Carrier Hvac Unit Heater Problem

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Old 01-03-02, 04:54 AM
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Carrier Hvac Unit Heater Problem

THE HEATER IN MY CARRIER CENTRAL AIR CONDITIONING COMES ON FINE BUT IT ONLY RUNS FOR ABOUT 10 MINUTES. THE BURNER THEN GOES OUT BUT THE FAN CONTINUES TO RUN. IT WILL ONLY STOP IF I TURN THE THERMOSTAT CONTROL TO THE OFF POSSITION. IT TAKES AT LEAST 30 MINUTES FOR THE FAN TO STOP AFTER I TURN THE THEMOSTAT OFF. AFTER THE FAN STOPS I CAN TURN THE FAN ON AND OFF WITH THE FAN ON/AUTO SWITCH. THEN I TURN THE THEMOSTAT CONTROL TO HEAT AND IT STARTS ALL OVER AGAIN. CAN YOU HELP?
 
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Old 01-03-02, 12:42 PM
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sounds like the fan limit is sticking. this may be a dial toward the top of the furnace, possibly under a rectangular cover. try to tap it after the burners are off for some time. if it turns the fan off, replace it, as it is also a safety that turns the burners off when the bonnet temp is too high.
 
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