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HomeRepair HelpPanasonic A/C RepairPanasonic Air conditioner circuit breaker keeps tripping Repair
Panasonic Air conditioner circuit breaker keeps tripping
If your Panasonic air conditioner trips the breaker, do not keep resetting it and hoping it clears. A tripping breaker usually means a shorted electrical part or an air conditioner power cord problem. On many window units, the LCDI protector in the power cord is sensitive and may trip before the home’s main breaker, especially if the cord or an internal component has shorted. If the power cord checks out, the next likely causes are a shorted condenser fan motor, dual shaft fan motor, or blower motor. A burned motor may smell hot or burnt, and you can test the windings with a multimeter. If your window air conditioner trips the circuit breaker as soon as power is applied, also inspect the wire harness for damaged insulation, loose connections, or breaks that could short to ground. Less commonly, a shorted control board can cause the same AC breaker keeps tripping problem and may show burn marks. Enter your Panasonic model number on RepairClinic.com to find the exact replacement power cord, motor, wire harness, or control board for your air conditioner.
01 - Panasonic Air Conditioner Power Cord
Most window air conditioners have an LCDI circuit protector that will detect a short in the cord or a component in the unit. If the circuit breaker on the cord is damaged or any of the components in the unit are shorted the circuit breaker will trip. The circuit breaker on the cord is usually more sensitive and will trip before the main breaker.
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Common
02 - Panasonic Air Conditioner Condenser Fan Motor
An air conditioner condenser fan motor is the component that spins both the condenser fan blade in the rear of the unit. If the fan motor is burned out or shorted it may trip the circuit breaker. You can use a multimeter to check if the motor windings are shorted. A shorted motor will usually have a burnt smell and will need to be replaced.
Common
03 - Panasonic Air Conditioner Dual Shaft Fan Motor
An air conditioner dual shaft fan motor is the component that spins both the condenser fan blade in the rear of the unit and the fan blade that forces the cooled air out the front vent. If the fan motor is burned out or shorted it may trip the circuit breaker. You can use a multimeter to check if the motor windings are shorted. A shorted motor will usually have a burnt smell and will need to be replaced.
Common
04 - Panasonic Air Conditioner Blower Motor
If the blower motor windings are shorted out the breaker will likely trip when power is applied to the motor. You can try disconnecting the motor from the unit to see if the breaker will still trip. You can use a multimeter to check if the motor windings are shorted. A shorted motor will usually have a burnt smell and will need to be replaced.
Common
05 - Panasonic 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
06 - Panasonic Air Conditioner Control Board
The control board regulates the power supply to all of the components of the air conditioner. 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
Frequently Asked Questions
Why does my Panasonic air conditioner trip the breaker as soon as it turns on?
Can a bad power cord make a Panasonic window air conditioner trip the circuit breaker?
How do I know if the fan motor is causing my Panasonic AC breaker to keep tripping?
Should I replace the control board if my Panasonic air conditioner keeps tripping the breaker?
How do I find the right replacement part for a Panasonic air conditioner that trips the breaker?
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