Search Error Codes
Search across 21 brands and 300+ diagnostic codes
If your Rinnai water heater displays error code 61, it means the fan motor has failed. The fan motor is responsible for ...
Error code 59 on your Noritz water heater indicates an overheating condition. This could be due to a faulty temperature ...
The E046 code on your Navien unit means the outlet thermistor, a temperature sensor located on the hot water outlet pipe...
The Noritz 14 error code indicates a failure of the thermal fuse in your water heater. The thermal fuse is a safety devi...
The Noritz 31 error code indicates a failure in the inlet thermistor, a crucial temperature sensor in your water heater....
Error code 33 on your Carrier furnace signifies that the unit's control board has detected an open limit switch or rollo...
Error 32 on your Noritz water heater indicates a failure in the outlet thermistor, a crucial temperature sensor. This se...
The error code 33 on your Noritz water heater indicates a failure in the heat exchanger thermistor. This component measu...
The error code 61 on your Noritz water heater indicates a fan motor failure. The fan motor is responsible for circulatin...
Error code 66 on your Noritz water heater indicates a failure in the bypass flow control valve. This valve is responsibl...
Mitsubishi's error code 7 indicates that the outdoor unit has either frozen or overheated. This is a safety feature desi...
The P6 error code on your Mitsubishi HVAC system indicates that the coil freeze/overheat protection feature has been act...
The Carrier error code 13, often displayed as a blinking LED pattern, signifies a 'Limit/Rollout Fault'. This means that...
The Daikin A5 error code indicates that your HVAC system has detected a condition that could lead to a freeze-up or over...
The Goodman 4 error, also known as an open high limit switch, indicates that your HVAC system has detected an issue with...
The E8 error on your Gree air conditioner indicates that the anti-high temperature protection has been triggered. This f...
The H3 error code on your Gree air conditioner indicates that the compressor has overheated and tripped its overload pro...
Mitsubishi's error code 6 indicates that your indoor unit's temperature has either dropped too low (freeze) or risen too...
The E016 error on your Navien boiler indicates that the water temperature has exceeded the safe limit. This could be due...
The E030 error on your Navien boiler indicates that the exhaust overheat sensor has detected temperatures exceeding the ...
The E047 error on your Navien tankless water heater indicates an open or short circuit in the DHW (Domestic Hot Water) t...
The E517 error on your Navien boiler or water heater means the water flow switch did not close within 10 seconds after a...
The E786 error on your Navien boiler indicates a failure in the header thermistor, a sensor that monitors the temperatur...
The E407 error code on your Navien tankless water heater indicates a problem with the domestic hot water (DHW) outlet te...
Rinnai's error code 31, Inlet Thermistor Failure, indicates a problem with the sensor that measures the temperature of t...
The Rinnai 32 error code signifies that the outlet thermistor, a temperature-sensing component, has failed. This part is...
Error code 33 on your Rinnai water heater indicates a problem with the heat exchanger thermistor. This sensor monitors t...
The Rinnai 57 error code indicates that there's an issue with the bypass servo valve in your water heater. This valve is...
Error code 65 on your Rinnai water heater indicates a problem with the water flow control valve. This valve ensures wate...
An open limit switch error on your Trane HVAC system indicates that the system has detected an open circuit in the limit...
The Navien E238 error code indicates an issue with the recirculation pump's operation. Specifically, the unit detects th...
The E311 error code on your Navien tankless water heater indicates that the unit's internal sensors have detected an abn...
The E351 error code on your Navien boiler indicates an issue with the automatic water feeder valve. This valve is respon...
The E421 error code on your Navien tankless water heater indicates a problem with the Domestic Cold Water Inlet Sensor. ...
The E434 error code on your Navien tankless water heater indicates an 'Abnormal Water Adjust Valve' condition. This valv...
The E439 error code on your Navien tankless water heater means the unit isn't sensing any domestic hot water flow. The u...
The E3 error code on your A.O. Smith tankless water heater indicates a problem with one of its temperature sensors. Thes...
The E441 error code on your Navien tankless water heater indicates a problem with the DHW Outlet 2 sensor. This sensor m...
The E761 error code on your Navien tankless water heater indicates that the unit's control board isn't detecting the pum...
The E352 error code on your Honeywell system indicates that the control board has lost communication with one of its tem...
The E805 error code on your Navien tankless water heater indicates that the unit is detecting an abnormal reading from t...
The E810 error code on your Navien tankless water heater indicates an issue with the circulator pump. This pump is respo...
The E811 error code on your Navien tankless water heater indicates a problem with the circulation pump, which is respons...
The E822 error code on your Navien indicates that the evaporator coil in your air conditioning system is experiencing ov...
The Navien E860 error code indicates a problem with the circulation of water within your heating system. Specifically, i...
The E1 error code on your A.O. Smith tankless water heater indicates a problem with one of its thermistors. Thermistors ...
The E2 error code on your A.O. Smith tankless water heater indicates a 'Dry Fire Protection' lockout. This safety featur...
The A.O. Smith E4 error code indicates that the high temperature limit switch has tripped. This switch is a critical saf...
The A.O. Smith water heater's 'ECO' or Emergency Cutoff code signifies that the high limit switch has tripped. This swit...
The '1R' error code on your Amana furnace, labeled 'Flame Without Call,' means the furnace's flame sensor is detecting a...