I have a Goodman GMP 100-4.
My problem is the blower is not blowing. The unit is blinking 4 times. From my research, this appears to be the limit switch or auxiliary switch.
The blower wheel will not turn by itself, but we are able to reach in and rotate it which then starts it. However, when the house reaches the temperature on the thermostat and shuts off, it will not kick on again unless we manually rotate the wheel. I have tried locating the limit switch and auxiliary switch, but the manuals and part images I find online have been poorly illustrated and I'm having trouble identifying these parts.
Does this sound like a limit or auxiliary switch issue? Can you direct me to a place that show a good illustration of the parts?
I hope I've explained this clearly - I'm a novice with furnaces.