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Old 11-23-2011, 04:57 PM   #1
DRM
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Furnace blower will not shut off


I have a Amana 90 air command furnace that is about 12 years old have replaced the control panel and now have replaced the limit switch. Furnace cycles on and off as it should but the blower runs constantly...and no the switch is not turned to run ..it is in the automatic position...help!

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Old 11-23-2011, 05:05 PM   #2
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Furnace blower will not shut off


The way to tell where the problem is requires that the G wire at the furnace thermostat wire connection be removed. Turn power back on, if fan still runs it is most likely the circuit board blower relay. If it stops, it means somewhere in the stat or stat wire is a short from R terminal wire to the G terminal wire.

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Old 11-23-2011, 05:13 PM   #3
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Furnace blower will not shut off


Quote:
Originally Posted by Milwaukeetool View Post
The way to tell where the problem is requires that the G wire at the furnace thermostat wire connection be removed. Turn power back on, if fan still runs it is most likely the circuit board blower relay. If it stops, it means somewhere in the stat or stat wire is a short from R terminal wire to the G terminal wire.
Thats as goood a place to start as any.......
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