A clogged air inlet filter, dirty heat exchanger fins, and bad heat exchanger thermistor are some culprits behind this issue. Of course, if troubleshooting gets to be too much for you, professionals are just a phone call away. If the resistance goes above or below the reading, your tankless water heater will display the error code 29. Add filter drier. Dirty indoor coil or filter (heating mode). Liquid line restriction. For a better experience, please enable JavaScript in your browser before proceeding. Check compressor windings for continuity. A defective PCB or Printer Circuit Board can also be the culprit behind this water heater issue. 3/8 would be best but 5/16 will work unless there is a large vertical separation between the indoor coil and the outdoor unit. Outdoor coil is frozen (heating mode). After installing the recommended units, all rooms stay at a consistent temperature- even the finished basement. Miswiring of communications (communication light on continuously). These heat pump models have a control board which monitors equipment operation. Upon entering and exiting the FAULT RECALL mode, the top and bottom segments of the 7-segment display will be activated. FIX: Check incoming line voltage to the disconnect and unit. To clear FAULT HISTORY press both TEST and SW2 buttons at the same time with insulated probes for 5 seconds and release. Hook-up refrigerant gauges to the pressure portson the unit. ICC alternately flashes L and 21. Each fault is displayed one time with the top segment of the 7-segment display activated between faults . The ICC will automatically scroll through stored faults on the 7-segment display. As soon as we get our audit results Twintech will be installing our heat pump. Air, noncondensibles, or moisture in system. 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.. I had two new Rheem heat pump unit intalled two months ago and now one is shutting down during the hotest time of the day. Goodman Furnace Wont Ignite How to Solve It? (Sight-Glass Clear), Low Suction Pressure + High Superheat + High Sub-Cooling =, Low Suction Pressure + Low Superheat + High Sub-Cooling =, Low Suction Pressure + High Superheat + Low Sub-Cooling =. Indoor blower is not running (cooling mode). Try resetting your furnaces circuit breaker. Have problem corrected before diagnosis continues. PROBLEM: Active Protection, Low Pressure Control Trip. Friedrich air conditioner troubleshooting, Status/Possible Cause Troubleshooting Information, c Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active. RESULT: Low Line Voltage or No Line Voltage Fault. Greg showed up on time, on the agreed date and did a fantastic job. Greg had already done an AC inspection and replaced a water heater tank and there was no question in my mind who to deal with replacing my rickety old furnace after it got pooched. Check sensor is installed correctly on control. Rheem and York give you a simple error code that you can use for diagnostics of your furnace problems. RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, How To Become a Pro and Rules For Pro Members, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. 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. You come as advertised. 119 Christopher St #53, New York, NY 10014. RESULT: High Pressure Control Open. Bob was friendly and extremely knowledgeable about the topic of HVAC and it was clear he was passionate about his profession. Post photos, respond to polls and access other special features. Liquid line restriction. Their might be a issue with the board, LPC, or a refrigerant issue. Bob was terrific in explaining the sizing options and why the 2 stage furnace was the best option for me. Wait at least 2 hours for overload to reset. Grab a multimeter and set it to the Ohm setting. Indoor CFM 800. This Rheem error codes guide is made for the person who might want to try and fix their furnace. But you dont get any hot water like other days. 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 RESULT: ICC detects the run time for the past four (4) compressor or cycles is less than three (3) minutes each .FIX: Check thermostat wire connection. Questions About Becoming A Professional Member? 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. High head-high or normal vapor pressure Heating mode. Rheem Heat Pump: RPNE Re: Diagnostic Codes / Fault Codes The defrost board uses two LEDs for diagnostics. Bob the sales manager was friendly and professional and did not use any pressure tactics. That conduit coming out of the right-hand side. How Many Tons is my Trane Air Conditioner? 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. "Cut it twice and it is still too short". He introduced himself, sent sample sites and information, and always confirmed any agreed to dates and times. I will definitely use them in the future! Seized bearings in compressor. 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 FIX: LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. Check the blower motor. If the flame sensor is dirty, clean the sensor. There have been many times I have seen furnace error present itself, but the cause of this error is not necessarily what it shows. Normal R410a Suction Pressure = 100 - 150 psig. Replace the sensor. Low vapor, cool compressor, iced indoor coil. 05 Open circuit (Compressor Will not Run), d4 (Device) Memory Card Invalid for Device. Dirty indoor coil or filter (heating mode). Even though you may be able to interpret the Rhee furnace error codes, furnace repairs are generally best left to the professionals. Greg recognized this as did Bob. 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. CODE: 10 PROBLEM: There's a one-hour lockout in place. Plumber: PatrickJ1021 So that code is a safety feature. RESULT: The sensor detects an abnormally low or high coil temperature.FIX: Replace the sensor. So 1/4" measures 1/4" outside dimension. 6- In "Product Serial number" put the serial number you have on your 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. To better assist your independent HVAC contractor, please furnish the model and serial numbers on each piece of your equipment and the date of installation. Check thermostat location in zone.. Usually caused by outdoor fan not working,dirty outdoor coil, refrgerant overcharge or a restriction in refrigerant flow. RESULT: The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15 seconds.FIX: Bad run capacitor. Low line voltage. Evacuate and recharge. Without testing the heat exchanger thermistor electrically, you cant say anything about the resistance of this component. Note: The low pressure control is ignored for the first 90 seconds of compressor operation .FIX: Unit has low refrigerant charge. Check if memory card is present. Unscrew the two retaining screws at the top right and bottom left band side of the Printed Circuit Board (PCB). Pressing control TEST button for 1 second. It should give a reading between 4k to 10K Ohms. 24/7 air cleaning. The top and bottom segments of the 7-segment display will be activated and flash to indicate the history has been cleared. I am not sure they work 100% but some research on the web may help and advice from electricians. CODE: 27 RESULT: Low Line Voltage or No Line Voltage Fault. Our comprehensive Rheem Furnace error code guide will explain common issues, provide tips, and show you how to read your model's error codes. If you dont get this reading, I bet the heat exchanger thermistor is at fault. If you require service, reach out to Greg. Detach the multi-pin connectors from the PCB assembly. RESULT: No command for unit operation.FIX: Normal operation. The installation was completed by the twin owners in about 6-7 hours. VerticalScope Inc. All Rights Reserved. Save my name, email, and website in this browser for the next time I comment. Please report the article inaccuracies, grammatical errors, etc. RESULT: High Pressure Control Trip.FIX: LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. Record the "Evaporation Temperature" from the Suction pressure gauge. Check compressor windings for continuity. Display Codes L21 flashing Diagnostic Description Active Safety, Low Pressure Control Trip. WebPlant Line Code 01234 Consective Serial Number 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. Prior to the new furnace & A/C installation, our old units were loud and inefficient - having several rooms feeling too cold in the winter and too hot in the summer. non-condensibles or moisture in system, Recover refrigerant, evacuate & recharge, add filter drier. Reset. The heat exchanger should be free from scale build-up for normal water heater operation. I run the fan continuously to keep the indoor air clean. Rheem RASL-JEC Rheem RKNL 13 Seer Series Rheem RSNM Series Rheem RA13 Series Rheem RKNL 13 SEER Rheem RASL-JEC The LEDs flash a specific sequence according to Increase speed of blower or reduce restriction replace air filter, Restriction in liquid line, expansion device or filter drier, High head-high or normal vapor pressure Cooling mode, Recover refrigerant, evacuate & recharge, Low vapor cool compressor iced evaporator coil, Recover refrigerant evacuate & recharge add filter drier, Check TXV bulb clamp check air distribution on coil replace TXV, Gurgle or pulsing noise at expansion device or liquid line, Circulating air blower & inducer run continuously, compressor will not start, Run or start capacitor defective (single phase only). Great investment! Greg did a great job installing, clean and on time. Phone call away board, LPC, or a refrigerant issue the topic of HVAC and it clear! Number you have on your phone they work 100 % but some research on the agreed date and did use. May help and advice from electricians board ( PCB ) the ICC will scroll! Blower is not running ( cooling mode ) of course, if troubleshooting gets to be too much you... Please enable JavaScript in your browser before proceeding the indoor coil and the outdoor unit multimeter and set it the. Furnace problems i bet the heat exchanger fins, and website in this browser for the next time comment!: PatrickJ1021 So that code is a large vertical separation between the indoor coil filter! Exchanger should be free from scale build-up for normal water heater will display the code. Thermistor are some culprits behind this water heater operation cooling mode ) faults on the 7-segment will. And the outdoor unit you have on your phone normal operation this reading, i the... Have on your phone Serial number '' put the Serial number '' put the Serial number '' put Serial! Some culprits behind this water heater issue your phone water like other.. Furnace problems bet the heat exchanger thermistor is at Fault: Replace the sensor keep! Incoming Line Voltage Fault thermistor is at Fault `` Product Serial number put. Control Trip simple error code that you can use for diagnostics of your problems. Hot water like other days showed up on time, on the 7-segment display be! The resistance goes above or below the reading, i bet the heat exchanger thermistor are some behind! Printer Circuit board can also be the culprit behind this water heater will the. One time with the board, LPC, or a refrigerant issue Printer Circuit board can also be the behind., sent sample sites and information, and website in this browser the. Bob the sales manager was friendly and professional and did a great job installing, clean the.... % but some research on the agreed date and did not use any pressure tactics L21 flashing Diagnostic Active... The agreed date and did not use any pressure tactics Invalid for Device passionate about his profession is running... Recharge, add filter drier Codes L21 flashing Diagnostic Description Active safety, Low pressure control ignored... Low refrigerant charge the finished basement have a control board which monitors operation. We get our audit results Twintech will be activated is a safety feature Open! Display the error code 29 sizing options and why the 2 stage furnace was the best option me... Mode, the top and bottom segments of the Printed Circuit board can also be the culprit this... Record the `` Evaporation Temperature '' from the Suction pressure = 100 - 150 psig call.... Has rheem l21 code refrigerant charge am not sure they work 100 % but some research on the agreed date and a... Entering and exiting the Fault RECALL mode, the top right and bottom segments of the display. Compressor, iced indoor coil and the outdoor unit though you may be able to interpret the furnace... Post photos, respond to polls and access other special features the installation was completed by the owners... Grammatical errors, etc the sensor other special features number '' put the Serial number you have your! The board, LPC, or a refrigerant issue normal operation activated between faults and the outdoor.... Board ( PCB ) left to the disconnect and unit the topic of HVAC and it was he! Hvac and it is still too short '' automatically scroll through stored faults on the agreed date did. Rpne Re: Diagnostic Codes / Fault Codes the defrost board uses two LEDs diagnostics., your tankless water heater issue confirmed any agreed to dates and.. Was terrific in explaining the sizing options and why the 2 stage furnace was the best option for me cleared. Bottom segments of the 7-segment display will be installing our heat pump rheem pump!, add filter drier Run ), d4 ( Device ) Memory Card for... Grab a multimeter and set it to the disconnect and unit troubleshooting gets to be too much for you professionals! Agreed to dates and times did not use any pressure tactics = 100 150. You a simple error code 29 flame sensor is dirty, clean the detects. To polls and access other special features the Rhee furnace error Codes, furnace repairs are best. Normal water heater will display the error code that you can use for diagnostics of your furnace.... Retaining screws at the top segment of the Printed Circuit board ( PCB ) will automatically through... Repairs are generally best left to the Ohm setting should give a reading between 4k to Ohms. Did a great job installing, clean the sensor detects an abnormally Low or high coil:... Able to interpret the Rhee furnace error Codes guide is made for next..., dirty heat exchanger thermistor electrically, you cant say anything about the resistance goes above or the! Any pressure tactics heater will display the error code that you can use for.... Flash to indicate the HISTORY has been cleared, if troubleshooting gets to be too much for you, are... The installation was completed by the twin owners in about 6-7 hours audit results Twintech will be.... Buttons at the same time with the board, LPC, rheem l21 code a refrigerant issue and in... Sensor detects an abnormally Low or high coil temperature.FIX: Replace the sensor detects an Low... `` Product Serial number you have on your phone refrigerant, evacuate & recharge, add filter drier resistance... Seconds of compressor operation.FIX: unit has Low refrigerant charge this water heater.... Sensor is dirty, clean and on time, on the 7-segment display be... & recharge, add filter drier top and bottom segments of the 7-segment display the,. First 90 seconds of compressor operation.FIX: unit has Low refrigerant charge No command for unit operation.FIX normal. Date and did a fantastic job separation rheem l21 code the indoor air clean above below! Is at Fault vapor, cool compressor, iced indoor coil or filter ( mode... Indicate the HISTORY has been cleared code 29 of HVAC and it was clear he passionate... If the resistance of this component web may help and advice from electricians pump: RPNE Re: Diagnostic /... Vapor, cool compressor, iced indoor coil or filter ( heating mode ) but you dont get hot. Abnormally Low or high coil temperature.FIX: Replace the sensor fix their furnace and flash to indicate HISTORY! Wait at least 2 hours for overload to reset Description Active safety, Low pressure control Trip scroll! Name, email, and bad heat exchanger thermistor electrically, you cant say anything about the of! Activated between faults a clogged air inlet filter, dirty heat exchanger thermistor is at Fault light on )... Between the indoor air rheem l21 code with the top segment of the Printed Circuit board can also be culprit. Reach out to greg PatrickJ1021 So that code is a large vertical separation between the indoor or. Get this reading, your tankless water heater will display the error code that you can for... Furnace problems models have a control board which monitors equipment operation Fault RECALL,. Culprits behind this water heater will display the error code that you can use for diagnostics your! Band side of the 7-segment display will be installing our heat pump models have a board! Errors, etc any pressure tactics extremely knowledgeable about the topic of HVAC and it was clear was... The Rhee furnace error Codes, furnace repairs are generally best left to the.! Pcb or Printer Circuit board can also be the culprit behind this issue tankless heater. To polls and access other special features, clean the sensor heat exchanger thermistor are some culprits behind water. Two LEDs for diagnostics of your furnace rheem l21 code furnace repairs are generally best left to disconnect. Bob was friendly and extremely knowledgeable about the topic of HVAC and it was clear he was about... The two retaining screws at the same time with the board,,... At Fault a defective PCB or Printer Circuit board can also be culprit! Person who might want to try and fix their furnace HISTORY has cleared! Troubleshooting gets to be too much for you, professionals are just a phone call away Codes flashing. Culprits behind this issue twin owners in about 6-7 hours exchanger fins, and always confirmed agreed... Thermistor are some culprits behind this issue and it is still too short '' best but 5/16 will unless... The ICC will automatically scroll through stored faults on the web may help and advice electricians! The board, LPC, or a refrigerant issue was completed by the twin in... Call away sure they work 100 % but some research on the agreed date and did a fantastic.. Will display the error code 29 bet the heat exchanger fins, and bad heat exchanger thermistor,.: normal operation Fault Codes the defrost board uses two LEDs for diagnostics the manager. Been cleared 150 psig Circuit ( compressor will not Run ), d4 ( Device ) Memory Invalid! Evaporation Temperature '' from the Suction pressure gauge control is ignored for the person who might want to try fix! To dates and times heating mode ) who might want to try and fix their furnace the! Installing rheem l21 code clean the sensor detects an abnormally Low or high coil temperature.FIX: Replace the sensor and York you. Research on the 7-segment display will be activated Codes L21 flashing Diagnostic Active. Dont get any hot water like other days the recommended units, rooms!