Our Goodman Furnace Model GM100 Serial# 9412063230 will start up and run but will not recycle after initially satisfying the thermostat. If you wiggle the gray,(ground), wire on the gas valve, it will start again. It may run OK for up to three weeks and then fail, (3 times), to ignite and go into lockout. This has been going on for about 3 months, but wanted to wait until the warmer weather before getting the furnace replaced, due to a possible extended time of replacement.
Does anyone kow what is in the little black terminal box on the gas valve?
Can the two screws and the black cover,(?), be removed to reconnect whatever is not making a good contact inside?