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The problem was the relay that control the induced blower, it's too old and keep getting stuck. I read the diagram but it's not there, but I should have thought of it. Anyway, every time it happens,...

I was so stupid, the settings on the limit switch must be the lower limit for the main blower to stop running. I should have set it to lower number so that the induced blower don't have to do the...

thank you so much

I removed one of the wire from the limit switch, the burner fire up as normal except the main blower doesn't run while the inducer blower does run.

When I turn off the...

Hi,

My furnace recently starts acting weird. After running up to satisfied temperature, the thermostat stops normally, then the blower stops 30 seconds later as usual, but the draft motor...

I did a little experience last week and record its behavior, here is what I know so far:

When I turn the thermostat to cool (desire temp is 6 degrees lower than room temp), the condenser run for 5...

Hi,

When I switch my thermostat to cool, the furnace fan runs as long as I keep setting at cool, but the condenser stop after about 30 minutes. The fan switch on the thermostat set to Auto.
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