Question about Honeywell CT3200 5-2 Day Electronic Programmable Thermostat Heater

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Blower won't shut off on heat or cool cycles

Honeywell Ct 3200 thermostat and Heil #NUGK100DH3 condenser gas furnace. Both are about 18-20 years old. Blower will not shut off after a heating or cooling cycle. I disconnected the green (fan?) wire from the thermostat and the fan continued to run. Could this be the thermal switch up in the plenum? ... or something more sinister?

Thanks, Dave

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  • Honeywell Master
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Hi it souds like the afc is not working check the setings on it or clean the back of it /or replace

Posted on Feb 17, 2010

  • Rafael Martinez
    Rafael Martinez Apr 03, 2014

    What does afc stand for

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