I have a mount vernon pellet insert from 2007 made by quadra fire. the unit has been intermittently working, more often not working. The error message is " Bad TC fire pot. indicating the thermo coupler in the fire pot. I have done a test on the thermo coupler with volt meter and it passes the test . It does however take a bit of time for the > 15 millavolts to be reached. And i contuined the test with a flame under the part unit i reached 23 mv. My thinking was that it was to slow to build to temp. in the time provide and shuts down. So as a workaround i tried removing the ceramic cover for a start up run. Even with full exposure to flame at start up , it failed to get out of start up and shut down once again. So What is the problem? My connection at the circut board is as good as it can be, the design is lacking here.
i am tempted to replace the thermocoupler again because it did check out.
What should i try next?