Hey, I've got a Goodman GMT115 gas furnace that, if turned on, will not stop heating the house. This started two nights ago, and it may be a fault in the fan/blower relay switch or something. I've tried turning off the thermostat, but the only way to regulate it now is to turn off power to the furnace. The manufacturer website doesn't give any help. Matching up the manual's wiring diagram with the furnace control panel and wiring doesn't quite mesh. Any help in diagnosing the problem, or identifying where the fan/blower relay is?
- posted
16 years ago