[hossmv]

I have a goodman furnace model # GMP075-3, serial # 9310089194
The blower fan randomly comes on even though thermostat is set on off and fan is set on auto.
1- Please tell me what should I check?
2- Please tell me where is the location of fan limit control switch and what is it look like?
Thanks
Victor

[wmproop]

Disconnect the tstat wires from the furnace end,, be sure to tag or mark each wire so you can put them back where they came from,, do this on a warm day that the furnace isn`t needed,, watch the furnace to see if problem is still there
If the prob. Goes away you can be pretty sure its either in the tstat or a short in the tstat wires between the furnace and tstat

On the inside of cover there should be a legand type diagram ,with a list of parts and a drawn out picture telling you where to find the part