Posted by T. Rebich on July 22, 2002 at 07:00:43:
I just installed a Goodman GMT furnace. I changed out the old 2-wire thermostat to a new 3-wire one, I don't know if that is the problem but I thought I would mention it. The new furnace (as soon as AC power is turned on) the power vent and house blower motors turn on. The gas does not turn on until thermostat tells it to. any clues.