Hayward H150 Gas millivolt heater

[Pghjoe]

I have a 12 year old Hayward H150 Millivolt system. When I want to turn it on, many times I must drop the top tilt out access, and give a strong love tap to the back of white thermostat cube. All of the wires seem intact and contacts are sprayed with WD40 each Fall and Spring.
Any ideas???

 

[ps0303]

Only way to determine what's wrong is to get out the volt meter and start measuring voltage thru the system. Or, pony up some $$ and get an updated system.

 

[Pghjoe]

Paul,
I'm an old retiree with little mechanical aptitude. If a tap on the back of the thermostat turns it on, should I spend the $40 and just replace the thermostat. It looks easier than mastering a volt meter. I have the heater on wheels and clean and store it in a heated garage every Pittsburgh winter.