Old-Biscuit wrote:
Gas valves are NOT SERVICEABLE
Thermistor???
That is a temp sensor for a fridge
What are you referring?
Thermocouple? (Pilot flame is staying ON so thermocouple IS working---it generates millivolts that HOLD magnet open allowing gas flow. When you push down on knob you are bypassing that to get gas flow....then thermocouple takes over)
And that probe out the backside...
That is the ECO (Energy Cut Off....a high temp probe. BLOWS if water temp gets to 190*F to shut down ALL gas flow--no pilot/no main. Gas Valve has to be replaced if it blows)
Thanks for the additional reply!
No, I'm not referring to the thermocouple - the pilot light stays lit so clearly that part of the gas valve is working (there is voltage from the thermocouple, and that voltage is holding the solenoid open).
And, yes I agree the ECO inside the probe is intact or there would be no gas flow at all (even to the pilot).
What I was referring to was the 'main' side of the valve... obviously the gas valve must sense the temperature of the water somehow (via the probe, I assume), and that in turn controls whether the main valve is open. As far as I know, the thermostat must be purely mechanical (bi-metallic?), or it's electrical and there's a thermistor that allows/disallows current to flow through a second solenoid to open the main valve. By your reaction it sounds like it's the former - so thanks!
I do understand that the standard answer is to say "It's not serviceable - you have to replace it!", but I was hoping a DIYer who has opened one up and fixed it might be able to tell me whether it's even worth trying.
In any case, I've got some torx security screws on order and plan to crack it open. I'll report back if I'm able to figure it out and fix it! :-)
Kind regards.
