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HomeRepair HelpLuxaire Central A/C RepairLuxaire Central air conditioner compressor won't run Repair
Luxaire Central air conditioner compressor won't run
If your Luxaire central air conditioner compressor won't run, the compressor itself may be defective or worn out, but check the other components first because they fail more often. A failed start capacitor is a common cause, especially if it is bulging, leaking, or cannot hold and release a charge. Next, inspect the contactor, which receives a low-voltage signal from the furnace control board and sends power to the outdoor condensing unit. A defective contactor coil or burnt contacts can keep the compressor from starting. Less common causes include a failed run capacitor, standard capacitor, or dual run capacitor that no longer supplies starting or operating voltage. You can use a multimeter to test capacitors, contactor coil continuity, and compressor continuity, but shut off power at the disconnect box and circuit breaker first. Capacitors and contactors involve hazardous voltage, so use caution and get professional help if you are not comfortable working inside the unit. Compressor replacement or any repair involving refrigerant or the sealed system requires an EPA 608-certified, licensed HVAC technician. Enter your Luxaire model number to find the exact replacement part for your specific central air conditioner.
01 - Luxaire Central Air Conditioner Compressor
The compressor is a pump which compresses the refrigerant and circulates the refrigerant through the evaporator and condenser coils. If the compressor is defective or worn out, it likely won't run. However, this isn’t usually the case. Before replacing the compressor, first check all of the more commonly defective components. If all of the other components are working properly, use a multimeter to test the compressor for continuity. If there is an open circuit, the compressor is likely defective.
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Highly Likely
02 - Luxaire Central Air Conditioner Start Capacitor
A start capacitor is often used to cycle on the compressor. If the capacitor burns out, the compressor may not run. The start capacitor can be tested with a multimeter to determine if the component can successfully hold and release its charge. If the capacitor is unable to hold and release a charge, or is bulging or leaking, the capacitor will need to be replaced.
Common
03 - Luxaire Central Air Conditioner Contactor
The furnace control board sends a low voltage signal to the contactor. When the contactor receives the signal from the control board, it closes the circuit, sending voltage to the condensing unit components. If the contactor is defective, it can prevent the compressor from running. To determine if the contactor is at fault, use a multimeter to test the contactor coil for continuity. If the contactor coil does not have continuity or the contacts a on the coil look burnt, replace it.
Common
04 - Luxaire Central Air Conditioner Run Capacitor
A run capacitor will power either the compressor or the fan motor (a dual run capacitor will power both). If the capacitor burns out, the compressor may not run. To determine if the run capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Less Common
05 - Luxaire Central Air Conditioner Capacitor
The capacitor provides voltage to the compressor to start it. If the capacitor is defective, the compressor won't run. To determine if the capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Less Common
06 - Luxaire Central Air Conditioner Dual Run Capacitor
A dual run capacitor will power both the compressor and the fan motor. If the capacitor burns out, the compressor may not run. To determine if the dual run capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Less Common
Frequently Asked Questions
Why won't my Luxaire central AC compressor run?
Can a bad capacitor keep my AC compressor from starting?
What should I check if my AC condenser won't start?
How do I find the correct Luxaire compressor or capacitor part?
Should I replace the compressor if it fails a test?
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