Somewhere on the furnace you should find a terminal strip where the wires
from your thermostat connect. Temporarily disconnect the red wire and see if
the furnace then shuts. The burner, if ignited, should quit immediately, and
the blower may take a while to turn off since it is most likely on a delayed
relay / switch. The key thing is to isolate the problem to either the
thermostat versus the furnace, which this simple test will achieve.

If the thermostat is stuck in the continuous on condition, then removing the
red wire will reveal that the thermostat and not the furnace is at fault.

If, on the other hand, the furnace continues to run despite the red wire
being disconnected, then the furnace itself is the problem.

There should be a wiring diagram someplace inside the furnace or in the
owner's manual if you want to try to troubleshoot the furnace with our help.
If not, call a competent repair person.

Smarty
"Dr. Hardcrab" wrote in message
news:vDanj.30021$75.16804@trnddc05...

wrote


Hey, I've got a Goodman GMT115 gas furnace


I'm sorry.....