Warning: Your Navien boiler is overheating, which could lead to system damage. Turn it off and call a professional.
How to Fix Navien Code E016
Turn off your boiler at the main power switch
Check if the water flow rate is normal
If water flow is normal, call a professional HVAC technician
How to Reset Navien Code E016
Turn off the unit using the power button on the front panel.
Turn off the gas supply valve.
Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
Restore power at the breaker, then open the gas valve.
Turn the unit back on. If the error returns, the underlying issue needs repair.
What does E016 mean?
The E016 error on your Navien boiler indicates that the water temperature has exceeded the safe limit. This could be due to a variety of issues, such as a faulty temperature sensor, a problem with the boiler's control board, or an issue with the water flow rate. It's important to address this issue promptly to prevent further damage to your boiler.
● Turn off the system for at least 30 minutes, and then restart it. ● Flush the heat exchanger.
Navien NFB-H Installation & Operation Manual
116
Heat Exchanger Overheat
Check flow, clean system filters.
Navien NFC-H Installation & Operation Manual
127
Overheating of heat exchanger
Manual RESET
Navien NHB-H Installation & Operation Manual
119
Heat Exchanger Overheat
Check flow, clean system filters.
Navien NPF Installation & Operation Manual
125
Overheating of the heat exchanger
This error occurs when the overheat controller on the heat exchanger is initiated during combustion due to the heat changer overheating. ● If the furnace is continuously inoperable, contact Technical Support at 1-800-519-8794.