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HomeRepair HelpGrandAire Central A/C RepairGrandAire Central air conditioner circuit breaker keeps tripping Repair
GrandAire Central air conditioner circuit breaker keeps tripping
When your GrandAire central air conditioner keeps tripping the breaker, the most likely cause is a shorted condenser fan motor in the outdoor condensing unit. A seized motor, shorted winding, or motor that will not turn freely can trip the circuit breaker or fuses. and can be checked for a short to ground by a qualified technician. Next, a defective blower motor in the furnace or air handler may overload the circuit, especially if the blower wheel does not turn freely, the motor smells burnt, or its windings are shorted. Less common causes include a shorted compressor, control board, or damaged wire harness with loose or broken connections. This symptom involves 240-volt line voltage, so turn off power at the disconnect box and circuit breaker, and do not test or replace these components unless you are qualified to work safely on HVAC electrical systems. Compressor diagnosis or any repair inside the sealed refrigerant system requires an EPA 608-certified, licensed HVAC technician. Enter your GrandAire model number to find the exact replacement condenser fan motor, blower motor, compressor, control board, or wire harness for your central air conditioner.
01 - GrandAire Central Air Conditioner Condenser Fan Motor
If the outdoor condensing unit's breaker or fuses keep tripping the condenser fan motor may be to blame. To determine if the condenser fan motor is shorted, use a multimeter to test the motor windings for a short to ground. If the condenser fan motor will not turn freely or the windings are shorted, replace the condenser fan motor.
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Common
02 - GrandAire Central Air Conditioner Fan Motor
If the outdoor condensing unit's breaker or fuses keep tripping the condenser fan motor may be to blame. To determine if the outdoor fan motor is shorted, use a multimeter to test the motor windings for a short to ground. If the outdoor fan motor will not turn freely or the windings are shorted, it will need to be replaced.
Common
03 - GrandAire Central Air Conditioner Blower Motor
Since the furnace or air handler's blower motor is the component that circulates the air through the home's venting, a defective blower motor may result in the circuit breaker tripping. You can try disconnecting the motor from the control board and see if the breaker still trips. You can also use a multimeter to test the blower motor for an electrical short, or see if there are any burnt smells coming from the motor. You can also try turning the blower wheel by hand. If the wheel does not turn freely, it's likely the motor bearings have seized. If the motor doesn't turn freely or is shorted the blower motor will need to b...
Common
04 - GrandAire Central Air Conditioner Compressor
The compressor is located in the outdoor condensing unit and gets power through a service panel box next to the unit. If the compressor is shorted the fuses in the service panel box or the main breaker box may trip. You can test the compressor for shorts by using a multimeter. If the compressor windings are shorted the compressor itself or the whole unit will need to be replaced.
Less Common
05 - GrandAire Central Air Conditioner Control Board
The control board regulates the power supply to all of the components of the furnace or air handler. If the control board shorts out it can trip the circuit breaker. A shorted control board will usually have burn marks or smell burnt and will need to be replaced.
Less Common
06 - GrandAire Central Air Conditioner Wire Harness
A wire harness sends power and low voltage signals between the electrical components and the control board. If a wire harness becomes damaged, it can short out causing the circuit breaker to trip. Check the appropriate wire harnesses for breaks or loose connections. A damaged wire harness will need to be replaced.
Less Common
Frequently Asked Questions
Why does my GrandAire central air conditioner keep tripping the breaker?
How can I tell if the condenser fan motor is causing the AC breaker to trip?
Can a blower motor or blower wheel cause my central air conditioner to trip the breaker?
Could the compressor or capacitor be causing the AC breaker to keep tripping?
How do I find the correct GrandAire central air conditioner replacement part?
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