Can anyone help with this?
We have an Empire RH65, propane, B-vent heater. We depress the off/pilot/on control knob and light the pilot. As soon as the pilot knob is released, the pilot flame goes out. The gas valve on this is heater is a Mertik Maxitrol GV31. The heater is between 5-10 years old.
OK- we replaced the thermocouple, the pilot flame is big and blue and covers the thermocouple end. Also, when we hold a small propane hand torch on the thermocouple end to pre-heat it, when we release the pilot knob, the pilot flame still goes out. The thermocouple is screwed in tight at the gas valve end
The vent safety switch wires (by the flue output), we can bypass and this makes no difference in pilot operation.
This heater did this before last month, I took the plastic cover off the valve body and turned an adjustment screw "out" on the top of the valve body. I dont know if this is some sort of spring tension control for an internal magnet. It is not the pilot flame adjustment screw as this is non-adjustable on LP valve and on the side of the valve body.
Well, we got the heater started after that. (Coincidence or not?) Now the heater is off because we had to change propane bottle and cant restart the heater, pilot flame goes out when knob released. The heater ran fine last winter but started to develop these pilot flame issues at the end of last season.
BOTTOM LINE QUESTION....is there a "magnet" in the valve body that goes bad (becomes saturated-whatever that means) and wont work anymore? Do we need a new valve body? What does the adjustment screw I turned really do? So confused. Dont understand gas valves at all but guess its time to learn. Replacing the valve is a can do, but really dont want to if it is really another minor issue.