Well, after some distractions, and a knuckle scrape or two, the unit was removed and the thermocouple replaced.
Much to my dismay, still, the pilot light will not stay lit.
The flame is strong, with proper color, when the button is held down.
Even after minutes with the button held, no standing pilot when released.
My next step will be to remove the flame end of the thermocouple, and set over an alternate flame, such as a candle. This may remove the possible issue of improper pilot positioning, and can be done without fully removing the unit again.
After that, I'm thinking gas control valve replacement (with proper LP orifice).
I know that there are two sensors related to preventing an over run/heat condition on this unit. A disc-like sensor mounted along the heat exchanger up & behind the valve, and a rectangular one mounted directly on the front of the unit just left is the pilot burner connection. There is also a fan 'flag' sensor.
It is my understanding that these come into play during operation, and are not a factor until the control valve is moved into the 'On' position. Regardless of their condition/fault, the pilot should still stand in the 'Pilot' setting.
Am I correct in this assumption?
(in correlation to other units/types I have repaired)
Any further help would be appreciated.
Any recommended supplier of this valve?
(which of course, I did not, happen to record the brand/model of while disassembled)
Thanks again
