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HomeRepair HelpNordyne Central A/C RepairNordyne Central air conditioner compressor won't run Repair
Nordyne Central air conditioner compressor won't run
When your Nordyne central air conditioner compressor won't run, the system may have an **AC compressor not running**, an **air conditioner compressor that won't start**, or a central AC compressor that is humming without starting. The compressor is the first component to consider, but it is not usually the most common failure. After disconnecting power, inspect and test the compressor for continuity. An open circuit indicates a likely defective compressor. Next, check the start capacitor, which helps cycle the compressor on; a bulging, leaking, or failed capacitor can stop it from starting. A defective contactor can also prevent voltage from reaching the condensing unit, while a failed run capacitor, standard capacitor, or dual run capacitor can keep the compressor from operating. Capacitors can retain a dangerous charge, and the compressor, contactor, capacitors, and other condensing unit parts involve 240V line voltage, so use a qualified technician if you are not trained to work safely around them. Compressor replacement or any repair involving refrigerant requires an EPA 608-certified HVAC technician. Enter your model number to find the exact replacement part for your Nordyne central air conditioner.
01 - Nordyne 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 - Nordyne 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 - Nordyne 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 - Nordyne 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 - Nordyne 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 - Nordyne 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 Nordyne central AC compressor not running?
How do I test a Nordyne AC capacitor when the compressor won't start?
Could the contactor cause my AC compressor not to run?
How do I know if the Nordyne compressor itself is defective?
How do I find the correct Nordyne compressor or capacitor replacement part?
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