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cleancondenser
05-23-2007, 11:39 PM
40 gallon gas with a vent motor FGR

the thermocouple screws into a factory interrupt switch
that connects to two limit switches on the top flue vent opening

I have continuity through the wire and both limit swiches, but

when i connect the limits back into the switch the pilot does not stay lit

If I jump out the switch the PILOT will stay on

Can it be a weak thermocouple that does not

generate enough current to travel through the limits?

The pressure swich is working and it energizes the vent motor when

the burner lights

oloenneker
05-24-2007, 12:15 AM
Check the voltage of the Thermocouple. If it is out of the acceptable range, its bad.

cleancondenser
05-24-2007, 09:17 PM
Should I check the Voltage at the terminals that are behind the
control vave
What is an acceptable milivolt reading for that valve