How to Fix Navien Error Code E004

When we have a Navien error code E004. There might be different issues with it.

- blockage in the venting system.If you have a blockage, it can short the onboard circuit board, which is what will ultimately cause false flame detection.

-Leak on the heat exchanger

How to solve Error Code E004 ?

-Clear the blockage

-If there is no blocking on the venting system; we need to asses the heat exchanger. If this is the case, we need to replace the heat exchanger.