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hkarnes
Dec 14, 2007, 05:50 PM
I have an intertherm central air/heat unit. The ac works fine. All of a sudden today the heater will come on but the fan won't blow. If I turn it on run the fan does, but on auto it doesn't. It still works fine when the ac unit is on.
hvac1000
Dec 14, 2007, 10:05 PM
The fan control is defective. Post the exact model number of your furnace.
hkarnes
Dec 26, 2007, 08:28 PM
Turned out to be a sequencer was going bad on the heater unit. Replaced it and now it is running fine. Thanks for your advice.
hvac1000
Dec 26, 2007, 08:32 PM
Cool the heat sequencer is actually the fan control on most models of intertherm