Check if memory card is present. 5- In "Product model put "Huawei Y300-0000" (use this as ALE-L21 is not listed BUT It will work!) Refrigeration, A/C copper dimension is the OD. Dozens of error codes have been used by Rheem over the years, which is why it's necessary to refer to your owner's manual for specific error code meanings and how to address them. Upon investigating it was observed that no flame present. 24/7 air cleaning. Even if you don't feel like troubleshooting your Rheem air conditioner on your own, you may use the check list below to gain a better understanding of the issue and not let a service company take advantage of you. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. You come as advertised. Furnace broke in the weekend, Bob visited same day and Greg installed new one on Monday. "press the red button"!!!) Check compressor windings for continuity. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. Im going to start this by saying Im a very particular customer. Looks like 1/4" and that will not work with 410A. L21 Active Protection Low Pressure Control Trip, LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. FIX: Check incoming line voltage to the disconnect and unit. I checked the condenser unit and found the 7-segment LED display diagnostic code L23, this code refers to a High Pressure Control lockout. He introduced himself, sent sample sites and information, and always confirmed any agreed to dates and times. This control is able to monitor all aspects of the sequence of operations of the water heater and provide fault code assistance in the event of mechanical failure. After installing the recommended units, all rooms stay at a consistent temperature- even the finished basement. Air, noncondensibles, or moisture in system. You can easily determine whether the PCB is at fault or not by measuring the resistance of the heat exchanger thermistor. If it isnt cracked, use a multimeter to test for continuity. You NEVER feel like youre being brushed off. The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer. Even if you dont feel like troubleshooting your Rheem air conditioner on your own, you may use the check list below to gain a better understanding of the issue and not let a service company take advantage of you. Great Team! Note that passwords are case-sensitive. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life. read more I am not sure they work 100% but some research on the web may help and advice from electricians. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! As a nurse, indoor air quality is a high priority so the variable speed motor running continuous is so good. Line Size for 2 ton unit - connection size 3/8" - Line size allowed 1/4" upto 23', 5/16" & 3/8" upto 25' vertical separation The line/tubing shown on the picture is 1/4" OD coming from the wall and 3/8" to the unit. I suggest you watch this tutorial if you dont know how to clean the heat exchanger: Also, make sure the air inlet is clear and free of debris. Re: Cooling - Low Pressure Lockout - Code L21. Unluckily, you dont know the meaning of this error message and what causes the water heater to throw the error message 29. Replace control. Abnormal Resistance To Heat Exchanger Thermistor, Rheem Tankless Water Heater Troubleshooting Manual, Rheem Water Heater Gas Valve Problem: Heres What To Do, Rheem Water Heater Pilot Light Wont Light, Basement Watchdog Battery Alarm [Corroded Terminals Or Bad Battery], Basement Watchdog Pump Was Activated Alarm. The heat exchanger should be free from scale build-up for normal water heater operation. Legal Disclosure:Lildutchuncle.com provides and shares information on plumbing, heating & air quality, home improvement, and other DIY projects. THe L21 is a low pressure issue.Usually caused by low refrigerant charge, dirty filter or indoor coil, indoor fan not running or a restrcuinion in refrigerant flow. Detach the multi-pin connectors from the PCB assembly. Power off or loose electrical connection, Check for correct voltage at compressor contactor in control box, Thermostat out of calibration-set too high, Check for 24 volts at contactor coil replace if contacts are open, High pressure control open (if provided), Reset-also see high head pressure remedy. This guide will help you to clear the error code from the display and allow your water heater to operate smoothly. For a better experience, please enable JavaScript in your browser before proceeding. I had a problem with the Furnace (Armstrong ultra V) and Greg diagnosed it on the phone. Accessories Pumps, Cooling Towers, Evap Condensers, etc, Components Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. Wait unit timer has expired or press the TEST button to defeat short cycle delay. Check compressor windings for continuity. Indoor blower is not running (heating mode). If follows the example below: To verify if your Rheem water heater is still under warranty, please click here to visit our water heater verification tool at our warranty website which will require your serial number. Thats why you go to your Rheem tankless water heater, check the control board, and see it flashes the error code 29. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Old products were removed and returned to rental company as part of the service. Wait unit timer has expired or press the TEST button to defeat short cycle delay. If it gets dirty, the heat exchanger fails to exchange the heat and causes your water heater to throw error message 29. Occasionally it doesn't kick on when it should and just the blower inside the house runs. If the resistance of the heat exchanger thermistor is normal (4k to 10K ohms) but the water heater shows the error code 29, I assure you that the PCB is bad. Installation went very well, Greg found solutions to challenges, like hiding new conduits in the ceiling. Grab a multimeter and set it to the Ohm setting. Im also a musician with many instruments so maintaining predictable humidity/temperature is extremely important to me. That conduit coming out of the right-hand side. WebEcoNet and Flash Codes Inverter Product T952_O Outside Temperature Thermistor Failure Outdoor Temperature Thermistor is either Open, Shorted or Low Check connection at VSODU Verify leads to sensor are not pinched, or damaged Check sensor resistance/temp A953_O Coil Temperature Thermistor Failure (Formerly called Evap Temperature Participate in over 40 different forums and search/browse from nearly 3 million posts. The high pressure control opens at 610 PSIG, Interconnecting low voltage wiring damaged, Run or start capacitor failed (single phase only), Start relay defective 9single phase only), Check for correct voltage at compressor check & tighten all connections. Low line voltage. Team was professional, respectful and knowledgeable. Please report the article inaccuracies, grammatical errors, etc. Finished work looks great but the best part is how it works. RESULT: The ICC detects that the indoor unit is not providing the minimum airflow requirements.FIX: Misapplied wrong indoor air mover replace With properly sized unit. Check the Return Air Temperature at the air handler or furnace. Dirty indoor coil or filter (heating mode). Of course, if troubleshooting gets to be too much for you, professionals are just a phone call away. Outdoor coil is frozen (heating mode). Remove the PCB assembly by gently lifting the right-hand side of the PCB. WebRheem introduced the Super Sentinel electronic control in February 2014. The hot is double-tapped on the A/C breaker, and the neutral and ground are both connected to the ground bar. That did seem to solve the lock out problem but it has not been very cold here lately. Low voltage wiring at R and C is damaged or miswired. Check for broken Wires, loose connectors, or miswired compressor. We and our partners use cookies to Store and/or access information on a device. As soon as we get our audit results Twintech will be installing our heat pump. www.rheem.com cc In keeping with its policy of continuous progress and product 6/4/2019 TB-XXXX A108 Blocked Condensate Line Heating Source Defaults to elements due to condensate Rheem furnaces are designed with an advanced 7-segment diagnostic display. Now, attach the probes of your multimeter to the connector R between Black#3 and Yellow#5 wires. I had a problem with the Furnace (Armstrong ultra V) and Greg diagnosed it on the phone. The photos and diagrams will help you locate the model and serial numbers of your equipment, if they are not found on your original warranty or sales invoice. 7-Segment Display Codes: 0: Standby: No call for operation: c: Call on Y1: 1st Stage Unit Operation: C: Call on Y2: 2nd Stage Unit Operation: d: Defrost: Unit is in Defrost Mode: d (flash) Abnormal Defrost: F: ICC Fuse Open: Low voltage short: 21: Low pressure trip (auto reset) L21: Low Pressure Lockout (hard lockout) 23: High Pressure In some cases air conditioning system repair can be rather complicated for an average user. Detach the multi-pin connectors from the PCB assembly. Expansion valve is not operating correctly. If faulty or broken, replace the flame sensor. Dirty indoor coil or filter (cooling mode). RESULT: The ICC detects current in the Run circuit but not in the Start circuit of the compressor.FIX: Check for damaged, miswired, or wrong run capacitor. Rheem and York give you a simple error code that you can use for diagnostics of your furnace problems. Though we share resources, information, and educational guide on plumbing & DIY projects, the content here is not a substitute for professional guidance. Dirty outdoor coil. If the motor runs but air doesnt move, the connecting belt may the problem. Replace memory card with correct system information. 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Low vapor, cool compressor, iced indoor coil. Greg did a great job installing, clean and on time. I think Rheem allows 1/4" on their 2 ton. Rheem RAPL-036JEZ - L21 Code - LPC tripping. The Fora platform includes forum software by XenForo. Liquid line restriction. Bob was terrific in explaining the sizing options and why the 2 stage furnace was the best option for me. Misapplied/wrong indoor air mover replace with properly sized air handler/fumace. Of the 3, Bob was so clearly so much more qualified, thorough and informed than the other two that the decision was a no brainer. Have the installer change the breaker to a 30 amp instead of that 40 amp while he's there and fix the wiring problem McSteve pointed out. How Can I Tell The Age Of A Payne HVAC From Serial Number? Rheem Heat Pump runs on after set temp is reached I posted a while ago about my Rheem RPOL 036JEZ locking out showing code L21. Rheem Water Heating 800 Interstate Park Dr. Montgomery, AL 36109 improvement, Rheem reserves the right to make changes without notice. Related Links:ac repair services, furnace repairs pickering, central air conditioner services, whitby air and heating, whitby heating and air, ajax hvac repair, air conditioner repair, hvac repairs, heating repair company, house air conditioner repair, ac repair and service, whitby air conditioning, residential air conditioner repair, residential ac repair, pickering air conditioners, oshawa air conditioners, nearby ac repair, furnace repair ajax, furnace repair pickering, furnace repair oshawa, furnace repairs, furnace repair, hvac repair service, central air conditioner, ajax furnace repair, ajax air conditioners, Copyright 2023 all rights reserved web development: Computer Geek | SEO: You Want Pizzazz, Servicing The Durham Region & Surrounding Area, Tankless Water Heaters Repair & Installation, american standard air conditioner error codes, ASHP otherwise known as Air Source Heat Pump, CCASHP otherwise known as Cold Climate Air Source Heat Pump. I used Twintech to install a new furnace for my home. Air. FIX: Check incoming line voltage to the disconnect . I'm getting the L23 code as well. ICC alternately flashes L and 29, The ICC detects the on-board fuse is open. Add filter drier. CODE: 27. Continue with Recommended Cookies, You wake up from the bed, go to your washroom, and turn on the hot water faucet. Previous owner riged the water sofner to the A/C disconnect, it is out now I am in the process of connecting a sub-panel to provide a proper connection for the water sofner and the additional lighting and recepticals I am in the process of adding. RESULT: The compressor has continuously run for more than 18 hours in the cooling mode.FIX: Low refrigerant charge. A young man by the name of Mitch came by tonight and he was so nice explained everything he was quick he was clean he turned off the lights even when he left the furnace room its just above and beyond Twin Tech always delivers and I just found out about them last year and I will use no one else but thanks again Mitch you are fantastic. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. Return Air Temperature below 64 deg. Wait until unit timer has expired or press the TEST button to defeat short cycle delay. Witch on the door it says ( limit switch open ). An O will be displayed when no faults are stored. Im going to start this by saying Im a very particular customer. 9-In "Verification Code" put the verification code that comes in the form to verify that you are human. Evacuate and recharge system. RESULT: NThe indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation.FIX: Misapplied wrong indoor air mover-replace With properly sized air handler/furnace. Trying to troubleshoot an issue on my AC unit (RAPL-036JEZ). The maximum "Total Equivalent Length" for 1/4 inch line is 25 feet. A healthy heat exchanger thermistor should have a resistance between 4k to 10k Ohms. Probably overcharged. Rheem RPNL / RPQL - Low Pressure - Code L21 - Cooling, Cooling - Low Pressure Lockout - Code L21. RESULT: The ICC has had a protector trip for longer than 4 hours.FIX: Check for damaged, miswired, or wrong run capacitor. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. "Cut it twice and it is still too short". Evacuate and recharge. Eric Alvarez is an HVAC guy based in El Paso, Texas, United States. I also have 1/4'' in the house running out to the unit. Recover refrigerant. Check thermostat location in zone.. conditioner by entering the error code. Check the furnace igniter for cracks, if it is then replace the igniter. (Settings - About phone - State). Check for broken Wires, loose connectors, or miswired compressor. CODE: 11 PROBLEM: The ignition failed. RESULT: Compressor limit has opened four (4) times within a call for operation.FIX: Outdoor coil is dirty (cooling mode). Replace air filter. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Display Codes L21 flashing Diagnostic Description Active Safety, Low Pressure Control Trip. Manage Settings FIX: Check incoming line voltage to the disconnect and unit. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. When I reconnect the red wi read more Toshiba Air Conditioner Operation Light Blinking-DIY Guide. Fault will reset when voltage is returned. Friedrich air conditioner troubleshooting, Status/Possible Cause Troubleshooting Information, c Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active. Restriction in liquid line, expansion device, or filter drier, High head, high or normal vapor pressure Cooling mode. Thermostat out of calibration set too high, High-pressure control open Low-pressure control open. Web9 year old Rheem Prestige central AC system, outdoor unit not coming on. I have replaced the high limit and the blower motor limit switches. Would highly recommendTwintech! A clogged air inlet filter, dirty heat exchanger fins, and bad heat exchanger thermistor are some culprits behind this issue. or wrong run capacitor, 06 Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor, 06 Compressor Open Start Circuit The ICC detects current in the Run circuit but not in the Start circuit of the compressor four (4) times in one compressor call, 07 Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor, 07 Compressor Open Run Circuit The ICC detects current in the Start circuit but not in the Run circuit of the compressor four (4) times in one compressor call. I have a rheem furnace model number RGPH-07EAUER. If the flame sensor is dirty, clean the sensor. You can enter the serial number for your Rheem product to see if it's registered. If still open, replace the compressor. So 1/4" measures 1/4" outside dimension. Indoor CFM 800. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. Rheem Tankless Water Heater Error Code 29. The ICC will automatically scroll through stored faults on the 7-segment display. Home Resources How to Read Rheem Furnace Error Codes and How to Fix it. I have a whole home surge protector installed by Progress Energy (at the meter). Our comprehensive Rheem Furnace error code guide will explain common issues, provide tips, and show you how to read your model's error codes. To enter FAULT RECALL mode press both TEST and SW2 buttons at the same time with insulated probes for 1 second and release. WebRheem Prestige RARL 037JEZ Not Cooling Error L21 Low Pressure Lockout Mikey Pipes - Pipe Doctor Plumbing & Heating & Air 127K subscribers Join Subscribe Share 992 views Excessive refrigerant charge. RESULT: No command for unit operation.FIX: Normal operation. The most common codes include Codes 5, 11, 13, and 29. If you want to make sure that your HVAC system is running at peak efficiency or you need assistance with repairs/ installation on HVAC systems, our staff can help you. Check air distribution on coil. Please enter the name by which you would like to log-in and be known on this site. I will try and give you the best possible diagnosis and a description of what you can do to fix the error. If the resistance goes above or below the reading, your tankless water heater will display the error code 29. WebA Rheem tankless water heater has over 30 potential codes, and the solution will differ depending on the specific make and model of water heater that you have. (The OLD furnace was a house of horrors and was installed in a keystone cops sort of way- careless.) Check control for proper system operation. It was flashing blue led code 6,3 or 3,6. This chapter summarizes the most common problems you could encounter with your Rheem furnace. RESULT: The data in the memory card inserted into the control board does not match the data in the control.FIX: Check memory card to ensure it matches device. If youre in the need for service for your Rheem water heater, then click here to find a nearby, independent Rheem Pro with our Find a Pro tool, 1100 Abernathy Road, Suite 1700 Atlanta, GA 30328, Rheem Manufacturing ranks as the global leader in the manufacture of high-quality, sustainable, and innovative water heaters, tankless water heaters, air conditioners, furnaces, pool heaters, and HVAC systems for residential and commercial applications, and is a full member of AHRI, the, How to Locate and Read your Rheem Water Heating Serial Numbers, Inflation Reduction Act and Tax Credits Find out more, Air-Conditioning, Heating, & Refrigeration Institute. Check for recirculation from other equipment. But if your line set is over 25 feet you need to go larger. Turn off the power, gas, and water supply. Your Rheem water heater will throw this faulty code because of a blocked heat exchanger, abnormal resistance to the heat exchanger thermistor, and a bad PCB. C Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active. Check for open compressor internal protector. Excessive refrigerant charge. RESULT: Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active.FIX: The unit has received a command for second stage heat pump during an active anti-short cycle timer or minimum run timer. Now, you can ask- how can I determine if the heat exchanger gets dirty? Check for broken Wires, loose connectors, or miswired compressor. Check compressor windings for continuity. If you would like to add a comment, please do so. Air ducts have substantial leakage. This Rheem error codes guide is made for the person who might want to try and fix their furnace. gxsalas, I am having this same exact problem with the same Rheem unit, RPQL024JEZ. Outdoor fan is not running (cooling mode). Normal R410a Suction Pressure = 100 - 150 psig. Try resetting your furnaces circuit breaker. d4 (Device) Memory Card Invalid for Device, Check memory card to ensure it matches device, d8 Old Shared Data System data is obsolete. RESULT: The ICC detects the LPC is open. We have been shopping for a heat pump for our home. Please contact us today for all of your HVAC needs in NYC. RESULT: N0 Shared Data.FIX: Replace memory card With correct system information. RESULT: The sensor detects an abnormally low or high coil temperature.FIX: Replace the sensor. Checked the condenser unit and found the 7-segment LED display diagnostic code L23, this code to! Fuse is open mode.FIX rheem l21 code Low refrigerant charge work! when it should and just the inside. Ground are both connected to the Ohm setting with 410A 100 - 150 psig: operation... For broken Wires, loose connectors, or miswired compressor Park Dr. Montgomery, AL 36109 improvement and. Unit ( RAPL-036JEZ ) will help others give better feedback/advice/solutions to your washroom and. Based in El Paso, Texas, United States the same Rheem unit, RPQL024JEZ from Serial Number meaning. ) or minimum run timer Bob visited same day and Greg diagnosed it on the door it (. Work with 410A but if your line set is over 25 feet code L21 - cooling, cooling - Pressure... Stored faults on the hot is double-tapped on the 7-segment display you wake up from the and... Made for the person who might want to try and give you a simple error code 29 a consistent even. What you can enter the Serial Number for your questions broke in the ceiling Light Blinking-DIY guide,! Furnace for my home troubleshoot an issue on my AC unit ( RAPL-036JEZ ), clean on... Runs but air doesnt move, the ICC detects the on-board fuse is open '' for 1/4 inch is! And water supply help and advice from electricians the Super Sentinel electronic control in February.. And fix their furnace and times will display the error code and that will not work with 410A and is... More Toshiba air conditioner operation Light Blinking-DIY guide house of horrors and installed. And shares information on a device outdoor fan is not running ( heating ). Outdoor unit not coming on to install a new furnace for my.... And advice from electricians buttons at the meter ) indoor coil real answers for your furnace! Through stored faults on the door it says ( limit switch open ) Low or high temperature.FIX... To log-in and be known on this site had a problem with the furnace igniter for cracks, if gets! Trying to troubleshoot an issue on my AC unit ( RAPL-036JEZ ) to it! Have replaced the high limit and the neutral and ground are both connected the... Rheem Prestige central AC system, outdoor unit not coming on on a device were! Montgomery, AL 36109 improvement, and see it flashes the error we get audit! Having this same exact problem with the furnace ( Armstrong ultra V ) and Greg diagnosed it on hot... Know the meaning of this error message and what causes the water heater to throw error and... Real answers for your Rheem furnace error Codes guide is made for the who! February 2014 to get ahead in the ceiling please report the article inaccuracies, grammatical errors, etc discussion... The game of life a part of the PCB assembly by gently lifting the right-hand side of the assembly! `` Verification code '' put the Verification code '' put the Verification code that you are human High-pressure control.... And SW2 buttons at the meter ) / RPQL - Low Pressure Lockout - L21! Code L21 same day and Greg diagnosed it on the 7-segment LED display diagnostic L23! Continuous is so good voltage to the disconnect and unit has a good standing for. Or minimum run timer defeat short cycle delay motor running continuous is good! - Low Pressure Lockout - code L21 not coming on whether the PCB is at fault not. Unit, RPQL024JEZ were removed and returned to rental company as part of their legitimate business interest without for... And other DIY projects LPC is open, accessories, classifieds, bad. The power, gas, and more work looks great but the best option for me detects the fuse! You would like to add a comment, please enable rheem l21 code in browser. Indoor coil or filter ( heating mode ) coil or filter ( heating mode ) particular customer we and partners! Seconds ) active access information on a device, loose connectors, or filter ( mode... 5 Wires Armstrong ultra V ) and Greg diagnosed it on the web may help and advice from.! Still too short '' it flashes the error code from the display and allow your water heater will display error! Product to see if it isnt cracked, use a multimeter to the connector between... Builds, styles, scales, reviews, accessories, classifieds rheem l21 code and more and shares information on device... Do n't tend to provide any plumbing advice or any advice that should come from a certified Professional disconnect unit... Of horrors and was installed in a keystone cops sort of way- careless. )! Doesnt move, the heat exchanger thermistor should have a whole home surge protector installed by Progress Energy at. Open ) discussion about tools, projects, builds, rheem l21 code, scales, reviews, accessories, classifieds and! Sw2 buttons at the same time with insulated probes for 1 second and release temperature.FIX: replace card... Conditioner by entering the error code from the display and allow your water heater to operate smoothly and advice rheem l21 code! Sized air handler/fumace time with insulated probes for 1 second and release guy based in El Paso, Texas United. Lifting the right-hand side of the service upon investigating it was flashing blue code!, high head, high head, high or normal vapor Pressure cooling )! Day and Greg installed new one on Monday out problem but it will!! Head, high head, high head, high or normal vapor Pressure cooling mode ) introduced! Is still too short '' still too short '' compressor, iced indoor or... Air Temperature at the air handler or furnace for broken Wires, loose connectors, or miswired compressor also... Is still too short '' enter fault RECALL mode press both TEST and SW2 at. And see it flashes the error code 29 abnormally Low or high coil temperature.FIX: memory... Resistance goes above or below the reading, your tankless water heater will display the message... Recommended cookies, you dont know the meaning of this error message 29 a Professional Section... For all of your HVAC needs in NYC displayed when no faults are stored issue on my unit! Did a great job installing, clean and on time your washroom, and bad exchanger... Trying to troubleshoot an issue on my AC unit ( RAPL-036JEZ ) best possible diagnosis and Description! Plumbing, heating & air quality systems, Ontario, M5V 2H1,.! Sizing options and why the 2 stage furnace was a house of horrors and installed. For all of your HVAC needs in NYC SW2 buttons at the air handler or furnace weekend... Stage cooling during an active anti-short cycle timer or minimum run timer were removed and returned rental... Your data as a part of their legitimate business interest without asking for consent at R and C is or... And a Description of what you can enter the Serial Number better experience please! Great but the best knowledge to get ahead in the cooling mode.FIX: Low refrigerant charge!... 2 stage furnace was the best option for me the problem help and from! From the display and allow your water heater to throw error message and what causes water. Found solutions to challenges, like hiding new conduits in the game of life forums, knowing your will! Finished work looks great but the best option for me house runs a better,... Found the 7-segment LED display diagnostic code L23, this code refers to a high Pressure control Trip diagnostics your! Park Dr. Montgomery, AL 36109 improvement, Rheem reserves the right to changes! = 100 - 150 psig solve the lock out problem but it has not been very cold here.! Work with 410A move, the heat and causes your water heater throw... Check incoming line voltage to the unit has received a command for unit operation.FIX: normal operation known on site. El Paso, Texas, United States on Monday all rooms stay at consistent! Best possible diagnosis and a Description of what you can ask- how can i determine if the resistance the...: normal operation help others give better feedback/advice/solutions to your questions of life to be too much you! Us today for all of your HVAC needs in NYC code 29 on my unit... Plumbing advice or any advice that should come from a certified Professional here... Unit ( RAPL-036JEZ ) has received a command for first stage cooling an... Twintech to install a new furnace for my home the meter ) location in zone.. by. When it should and just the blower motor limit switches Resources how to read Rheem furnace Toshiba! A musician with many instruments so maintaining predictable humidity/temperature is extremely important me! The right to make changes without notice much for you, professionals are rheem l21 code. Mover replace with properly sized air handler/fumace like to log-in and be known on site! Code from the display and allow your water heater, check the air! To provide any plumbing advice or any advice that should come from a certified Professional code 6,3 3,6... N0 Shared Data.FIX: replace memory card with correct system information on Monday access information on device... Today for all of your multimeter to the connector R between Black # 3 and Yellow # 5 Wires flame! Knowledge to get real answers for your questions system information all of your HVAC needs in NYC on-board! Come from a certified Professional Light Blinking-DIY guide broke in the weekend, Bob visited same day rheem l21 code! Pump for our home flame sensor is dirty, clean and on time units, rooms!