Craigory

Thanks for the reply! I fixed it the next day. It needed a thermostat which makes complete sense. It would run up and over the normal temp until it hit the overtemp limit which closes the gas supply valve. The T-stat says it still wants more heat so the igniter tried three times to start with no gas supply which puts it into limp mode until you cycle the remote switch. Like a $6 part.

Found it to be the thermostat after doping it out a little more. When it tried to relight after running up to temp, it couldn’t. That told me the thermostat was calling for more while the overtemp said nope. That locked out the board until I cycled the remote switch. Thanks for you answers 

PS I already bought a new module and that didn’t fix it. If I turn the remote Off and on, it usually starts up, but sometimes I need to wait a bit.

I have the same issue. It starts and heats, then it stops and tries to relight. I hear the click click click three times and it goes to limp mode with a barely audible whine. The gas valve seems to crack open fine initially, but it’s not called for on the relight. Is that because the t-stat or overtemp is bad?