I have a Vermont Castings gas fireplace with a Honeywell RV8310 RF valve.
Here is what is happening...
Sometimes it works fine for hours.
Sometimes the pilot goes out.
Sometimes the unit calls for heat and the fan goes on, but the main burner does not light, and the pilot is still lit.
The pilot is always fairly easy to light and leave in the "pilot" position, but sometimes when I turn the knob to "on", there is a click and the pilot goes out.
Here is what I have checked and tested...
Both thermopiles read 600+ mV open circuit. I tested this with the pilot on, while holding the pilot light button in.
When testing them in circuit, they fluctuate between 370-420 mV.
When the pilot is lit, and the unit is in the "on" position, the red LED flashes once about ever 1.5 seconds. It does this even with no batteries in the remote, so it is not getting commands from the remote. According to my manual, it should only flash when it receive a valid code from the remote or if there is an error. I am not getting any error codes as described in the manual.
I have cleaned the thermopiles with no luck.
The question is, do I replace the thermopiles or the valve. The symptom that concerns me most is when the pilot remains lit and the unit is calling for heat and the fan is on, but the main burner is not. This symptom seems atypical for indicating bad thermopiles.
All suggestions appreciated.