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Carrier home heat

I have model no. CB5AXA024000AAAA
I CAM HOME TO FIND THE FURNACE FAN RUNNING
CHECKED THE THERMASTAT AND IT WAS IN THE OFF POSITION
I KNOW THERE IS A PART THAT TELLS THE FAN TO RUN INDEPENDENT OF THE THERMASTAT AND I SUPECT IT IS THIS PART THAT IS DEFECTIVE BUT I HAVE NO CLUE WHAT IT LOOKS LIKE.
I AM A MECHANIC AND ADDAVANCED IN AUTOMOTIVE A/C AND I WOULD LIKE TO FIX IT MYSELF.

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If the unit is manual control there are two knobs in the control the thermostat and the selector switch. If your selector switch is in fan position the fan will run and the compressor will be "off"(even if you "off" and "on" your thermostat), if your selector switch is in cool position and your thermostat is in "on" position the compressor and fan will both run. But if the thermostat is in "off" position and your selector knob is in cool position the fan will run but the compressor will be "off".

Posted on Jan 15, 2008

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Posted on Jan 02, 2017

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