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Navien Error Codes

Navien Error Codes Navien, service and repair contractor. Boston / Dedham MA Vaughan Plumbing and Heating, LLC

 

5. Troubleshooting 5.1 Error Code List Error Code Function Self-diagnostic/Action E003 Ignition failure 1. Check to see if the main gas supply valve is open. 2. Check that the power is “ON”. 3. Check the igniter for spark.

 

E004 False ame detection 1. Ensure ground wire is connected. 2. Check the igniter for spark.

 

E012 Flame loss 1. Check the main gas line (Is the valve open?). 2. Check intake air filter .
3. Check ground wire .
4. Check power supply.

 

E016 Overheating of heat exchanger 1. Turn OFF the system for at least 30 minutes then restart. 2. Clean the inlet water filter.
3. Check the water adjustment valve.
4. Check the heat exchanger; a flush may be necessary.

 

E030 Exhaust Overheat: exhaust limit switch shuts down the unit when the ue temperature exceeds 230 °F (110 °C) for more than 10 minutes. 1. Turn OFF the system for at least 30 minutes then restart. 2. Clean the inlet water filter.
3. Check the water adjustment valve.
4. Check the heat exchanger; a ush may be necessary.

 

E046 Abnormal heat exchanger thermistor Check heat exchanger thermistor connection

 

E047 Abnormal exhaust thermistor Check exhaust thermistor connection.

 

E060 Abnormal operation: dual venturi Check the Dual Venturi connection.

 

E109 Abnormal fan motor activity 1. Check and clean the intake air lter. 2. Check and clean the fan motor.

 

E110 Exhaust blockage 1. Check the exhaust pipe for obstructions. 2. Check and clean the intake air filter

 

E407 Hot water outlet1: thermistor open or short 1. Check the thermistor. 2. Replace the thermistor.

 

E421 Cold water inlet1:thermistor open or short.

 

E432 Cold water inlet2: thermistor open or short.  Error Code Function Self-diagnostic/Action

 

E434 Abnormal water adjustment valve. Check the water adjustment valve.

 

E438 Abnormal circulation pump. 1. Check the circulation pump.
2. Check the ow sensor.
3. Check the cold water main line.

 

E439 Abnormal ow sensor Check the ow sensor.

 

E441 Hot water inlet2: thermistor open or short. 1. Check the thermistor. 2. Replace the thermistor.

 

E445 Abnormal bypass mixing valve. Check the bypass mixing valve.

 

E515 Abnormal PCB Check the PCB for damage or defects.

 

E517 Abnormal dip switch setting Check the dip switches on the front panel and PCB.

 

E593 Abnormal panel key Check the Panel

 

E615 Abnormal input & memory Check the PCB. 1.

 

E736 Abnormal cascade communication 1. Check the Ready-Link cable. 
 2. Check the cascade settings. 


 

E760 Flushing/service alarm A heat exchanger ush is necessary.

 

E782 Abnormal Main-Panel communication Check the PCB. If any of the above solutions do not resolve the problem with the Water Heater, contact Navien’s Technical department at 1-800-519-8794.
There will be error codes displayed on the front panel and recorded on the PCB board (within the unit) of any problems or failures that occur with the Water Heater.  IMPORTANT To reset the Water Heater, either press the [Reset] button on the front panel or disconnect, then reconnect electrical power to the water heater. Error Code Reason Self-diagnostic / Action

 

E001 Water is boiling inside the heat exchanger 1. Clean the inlet water strainer (part#25). 2. Check the heat exchanger; remove and clean with a cleaning solution.

 

E002 Low pressure on heating side 1. Turn off the system. 2. Turn the unit back on.

 

E003 Ignition failure 1. Check to see if the main gas supply valve is open. 2. Check that the power is “ON”. 3. Check the igniter for spark (part#18).

 

E004 False flame detection 1. Ensure ground wire is connected. 2. Check the igniter for spark. E005 Space Heating supply : Thermostat-open 1. Check the thermostat. 2. Replace the thermostat.

 

E006 Space Heating supply : Thermostat -closed 1. Check the thermostat. 2. Replace the thermostat.

 

E007 DHW Hot water supply: thermostat -open 1. Check the thermostat. 2. Replace the thermostat.

 

E008 DHW Hot water supply: thermostat -short 1. Check the thermostat. 2. Replace the thermostat.

 

E009 Abnormal fan motor activity 1. Check and clean the intake air filter. 2. Check and clean the fan motor.

 

E010 Abnormal air pressure 1. Check the exhaust pipe for obstructions. 2. Check and clean the intake air filter.

 

E011 High pressure on heating side 1. Turn off the system. 2. Remove pump drain coke. 3. Drain water to release pressure 4. Re-plug the pump 5. Turn the unit back on.

 

E012 Flame loss 1. Check the main gas line (valve open?). 2. Check the intake air pipe. 3. Check ground wire. 4. Check power supply.

 

E013 Abnormal Pump Activity 1. Check the pump. 2. Replace the pump. If any of the above solutions do not resolve the problem with the combination boiler, contact Navien’s Technical department at 1-800-519-8794. Error Code Guide Error Code Reason Self-diagnostic / Action

 

E015 Abnormal PCB board 1. Check power supply 2. Check the power switch E016 Overheating of heat exchanger 1. Turn OFF the system for at least 30 minutes then restart 2. Clean the DHW cold water filter (part#25) 3. Check the heat exchanger; remove and clean with a cleaning solution E018 Space heating return: Thermostat - open 1. Check the Thermostat. 2. Replace the Thermostat. E019 Space heating return: Thermostat-short 1. Check the Thermostat. 2. Replace the Thermostat.

 

E021 DHW cold water inlet: Thermostat -open 1. Check the Thermostat. 2. Replace the Thermostat.

 

E022 DHW cold water inlet: Thermostat -short 1. Check the Thermostat. 2. Replace the Thermostat.

 

E027 Abnormal activity of the air pres- sure sensor 1. Check the exhaust & intake air pipe for obstructions 2. Check and clean the intake air filter.

 

E028 Pipe leak on heating side 1. Check pipes on heating side

 

E030 Exhaust Overheat: exhaust high limit switch shuts down the unit when the flue temperature exceed 149°F (65°C) 1. Turn OFF the system for at least 30 minutes then restart 2. Clean the DHW cold water inlet filter. 3. Check the heat exchanger; remove and clean with a cleaning solution.

 

E035 Abnormal activity of the gas pressure sensor 1. Check gas line.

 

E036 Communication failure 1. Contact to Navien tech. dept.

 

E037 Water leak Inside unit 1. Close DHW cold water main. 2. Replace leaking parts. E039 Abnormal the flow sensor. 1. Check the water flow sensor

 

E040 Outdoor Temperature Sensor – short (display only computer board) 1. Check Outdoor sensor 2. Replace There will be error codes displayed on the remote controller and on the PCB board (within the unit) of any problems or failures that occur with the combination Boiler. NOTE: To reset the combination boiler, either unplug and re-plug the electric supply or if a remote controller is installed, press the power button of the remote controller “OFF” then “ON”. Memo 5% off a service call with this code {Servicegcd} FOOTER [ Edit ]