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HomeRepair HelpGoodman Central A/C RepairGoodman Central air conditioner compressor won't run Repair
Goodman Central air conditioner compressor won't run
Won’t your Goodman central air conditioner compressor run? The compressor may be defective, but test the other components before ordering this expensive sealed-system part. A failed start capacitor is a common reason an air conditioner compressor won't start, especially if the compressor hums but does not begin running. Next, inspect the contactor, which receives a low-voltage signal from the control board and sends power to the outdoor condensing unit. A faulty contactor, burned contacts, or an open coil can cause a central AC compressor not working symptom. Less common causes include a failed run capacitor, capacitor, or dual run capacitor, which supplies starting and running voltage to the compressor and condenser fan motor. Testing capacitors, contactors, and compressor continuity involves stored electrical energy and potentially 240V line voltage, so shut off power at the disconnect box and circuit breaker, and attempt these checks only if you are qualified. Compressor replacement or any repair involving refrigerant requires an EPA 608-certified HVAC technician. Enter your Goodman model number to find the exact replacement part for your specific central air conditioner.
01 - Goodman 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 - Goodman 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 - Goodman 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 - Goodman 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 - Goodman 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 - Goodman 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 is my Goodman AC compressor not running?
My AC compressor is humming but not starting. Could the capacitor be bad?
Why is my AC condensing unit not turning on?
How do I know if my Goodman AC compressor is defective?
How can I find the correct Goodman AC compressor or capacitor replacement part?
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