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Old 01-24-2009, 09:10 PM   #1
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Furnace fan running continuously

Hi, I have a 1991 Snyder General Furnace. Recently the exhaust blower fan has been running continuously but heat has not been coming on.

The only way to get it working is to shut off the thermostat and turn it back on - for some reason this does the trick.

If anyone has any ideas on what may be causing this problem... it would be greatly appreciated.


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Old 01-24-2009, 09:36 PM   #2
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You are not very clear, are you saying that your furnace is heating fine, but the draft motor is staying on all the time, or are you saying you have no heat and the draft motor runs all the time. There is a difference; 1 indicates a relay sticking and the other indicates the pressure switch not closing, need more info.


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Old 01-24-2009, 09:39 PM   #3
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the ID is only running when the stat calls for heat...as it should?tap the pressure switch(handle of a screwdriver) that the rubber tube goes to.the 2 wires connected to it are the circuit for your main burner,and when the ID runs that switch is suppose to close from the air pressure going into the furnace.remove the tube could be moisture in the switch.
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