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HomeRepair HelpNordyne Central A/C RepairNordyne Central A/C Condensing unit does not run Repair
Nordyne Central Air Conditioner Condensing unit does not run
If your Nordyne outdoor AC unit is not running, the problem may be in the compressor, wall thermostat, condenser fan motor, or another control or safety component. The most likely cause listed for a Nordyne AC condenser not turning on is a failed compressor, especially when the capacitor and condenser fan motor appear to operate normally. A faulty wall thermostat can also prevent both the furnace and condensing unit from starting. Next, check the condenser fan motor and fan motor for seized bearings, poor electrical continuity, or a lack of power. If the unit has power but neither the compressor nor fan runs, a sealed-system problem, low refrigerant, or tripped low-pressure switch may be stopping operation. A high- or low-pressure switch can also fail, although this is less common. Testing capacitors, motors, the contactor, thermostat, and wiring requires caution because the condensing unit uses 240V line voltage. Refrigerant or pressure-switch repairs require EPA 608 certification and a licensed HVAC technician. Turn off power at the disconnect box and circuit breaker before DIY checks. Enter your Nordyne model number to find the exact replacement part for your central air conditioner.
01 - Nordyne Central Air Conditioner Compressor
Central air conditioners use a compressor to pump refrigerant through the condenser coils located in the outside condensing unit and through the evaporator coils mounted on top of the furnace or air handler. While it's not a common problem, if the compressor fails, the condensing unit will not run. You can use a multimeter to test the compressor for electrical continuity, a continuous electrical path present in the component, to help determine if the compressor is faulty. If all other potentially defective components, such as the capacitor and condenser fan motor, are operating properly, then a qualified technician should ...
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Highly Likely
02 - Nordyne Central Air Conditioner Wifi Thermostat
The WiFi thermostat has contacts in it that control the furnace. If the contact fails it can result in the furnace and the condensing unit to not run at all.
Common
03 - Nordyne Central Air Conditioner Condenser Fan Motor
A faulty condenser fan motor can be responsible for the central air conditioner condensing unit not running. You can use a multimeter to test the fan motor for electrical continuity, a continuous electrical path present in the motor, to help determine if the motor is defective. You can also use the multimeter to determine if power is reaching the motor. You can also try rotating the fan blades by hand. If the blades do not turn freely, it's likely the motor bearings have seized and the fan motor will need to be replaced.
Common
04 - Nordyne Central Air Conditioner Fan Motor
A faulty fan motor can be responsible for the central air conditioner condensing unit not running. You can use a multimeter to test the fan motor for electrical continuity, a continuous electrical path present in the motor, to help determine if the motor is defective. You can also use the multimeter to determine if power is reaching the motor. You can also try rotating the fan blades by hand. If the blades do not turn freely, it's likely the motor bearings have seized and the fan motor will need to be replaced.
Common
05 - Sealed system problem
If the condensing unit has power to it, the contactor checks out okay, but the fan and compressor are not running, it is likely that the unit is low on refrigerant which will cause the low limit pressure switch to trip and keep the unit from running. Since diagnosing and repairing a sealed system takes specialized tools and knowledge, a qualified service technician should diagnosis and repair the unit.
Common
06 - Nordyne Central Air Conditioner Pressure Switch
A pressure switch is a safety device used to help prevent component and system failures. There are basically three types of pressure switches used in central air conditioning and heat pump applications: High Limit, Low Limit, and Ambient Temperature. Depending on the model, you may have one or more of these or none. The pressure switch(es) can be checked with a multimeter, referencing the wiring diagram for the circuit locations. Note: If a pressure switch needs to be replaced the refrigerant will need to be removed, requiring a qualified technician.
Less Common
Frequently Asked Questions
Why is my Nordyne AC condenser not turning on?
What should I check if the Nordyne condenser fan is not running?
Can a thermostat cause my central AC condensing unit not to start?
Why do the condenser fan and compressor both stop running?
How do I find the correct Nordyne AC replacement part?
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