How long should a furnace run before the blower turns on?

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I have an Armstrong forced air (induced draft) natural gas furnace with central AC (made around 1990 -- Model: EG6H80DC14-1, Serial: A18315MNA). I had a problem at the end of the heating season where the blower motor would run continuously (even when the thermostat is turned to "off"). I thought...

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Hello my nordyne mmha-077aahr-01 gas furnace turns on but the blower doesn't. The furnace motor turns on for about 30 seconds then turns off then turns on again for 30 more seconds then turns off and this continues to happen for about 3 minutes and then the control board blinks a red light three...

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The blower on my Goodman gas furnace came on all by itself tonight? Every 5-10 minutes the blower turns on for approx 1 minute then turns off by itself. Then the cycle repeats. I verified that the thermostat is in the off position (no heat/no cool) and that the fan switch was set to auto. I...

Furnace blower turns on and off [ 4 Answers ]

Furnace comes on and heats properly. After it turns off the blower kicks on and off several times more times.

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