Navien Ace Gas Boiler Error Codes
Code Fault
03 No flame signal or flame sensor failure
04 False flame signal or flame sensor short circuit
05 Open circuit for the heating water temperature sensor
06 Heating water temperature sensor circuit short-circuited
07 Open circuit for hot water temperature sensor
08 Short circuit of hot water temperature sensor circuit
15 Malfunction or malfunction of control card
16 Boiler overheating
18 Overheating of the smoke detector
Navien Deluxe Gas Boiler Error Codes
Code Description of the malfunction
02 Insufficient amount of water in the heating system or an open circuit in the flow sensor
03 No flame signal or flame sensor failure
04 False flame signal or flame sensor short circuit
05 Open circuit for the heating water temperature sensor
06 Heating water temperature sensor circuit short-circuited
07 Open circuit for hot water temperature sensor
08 Short circuit of hot water temperature sensor circuit
09 Fan failure
10 Fault in the smoke exhaust system
13 Short circuit of the heating water flow sensor
15 Malfunction or malfunction of control card
16 Boiler overheating
27 Air pressure sensor open or short-circuited