Question about Heating & Cooling
Air Conditioner Fan intermittently stops blowing cold air into the house. When the fan stops blowing, we notice that the cooling coil connected to the AC unit is frozen. If we reset power to the AC unit and the furnace, it begins cooling again. This behavior is starting to occur about every day now. Have replaced thermostat and the issue still occurs. The breakers to the unit and furnace don't ever trip when this happens either. Not sure what the problem could be.
When the fan stops blowing, we notice that the cooling coil connected to the AC unit is frozen. That statement says a lot, The evaporator fan motor is failing which is causing the coil to freeze up. Voltage and amperage to the fan motor needs to be checked at the motor, sounds like the motor may be overheating and tripping off. The fan also should be checked for drag as a bad bearing could cause this issue. If all of the above checks out motor may need replaced.
Posted on Jan 11, 2013
You need to call a reputable service technician. The freezing up usually is associated with a low refrigerant charge or low air flow. Check your return air filter and replace as needed.
Posted on May 30, 2009
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Posted on Jan 02, 2017
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