Heat & Fan Work When Wired But Not With Thermostat. - HVAC - DIY Chatroom Home Improvement Forum


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Old 10-20-2009, 11:28 AM   #1
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Heat & fan work when wired but not with thermostat.


Carrier 58 ss

The flame starts when red & white wires connected.
The fan starts when red and green wires connected.
Fan does not go on when thermostat set to fan.
Heat does not work with thermostat.
AC works fine with thermostat.

What is my best course of action.

Thanks,
Two Cities

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Old 10-20-2009, 10:41 PM   #2
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Heat & fan work when wired but not with thermostat.


Is this a new stat? If so, is Rh and Rc jumpered? Is it properly configured?

If this stat worked fine last winter, replace the stat.

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