Forum Discussion
climb_on
Nov 17, 2019Explorer
enblethen wrote:
Go to the furnace, locate the two blue wires. Connect them together. This should start the furnace fan, within short period 10-20 seconds the furnace should produce heat.
If nothing happens verify 12 volts DC to furnace. No power, probably fuse.
Power but no fan check small circuit breaker mounted on fan housing.
Fan comes on but no heat, blow the furnace out, paying attention to the sail switch area.
I will go try that now. I do believe I got the blower fan to turn on when I was troubleshooting it back in October. Don't recall how, but I bet it was the 2 blue wires. Where is the sail switch located? I know what a sail switch is, but I've never noticed one.
A strange development I forgot to mention....on the evening after replacing the board on the furnace (with no change), in the middle of the night the furnace fan turned on. No spark or gas though. I looked at the thermostat and I still had it set to call for heat. After waiting to see if the heat would come on (it didn't), I clicked the thermostat off and the next day, I could not recreate the fan coming on.
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