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HomeRepair HelpAmana Central A/C RepairAmana Central A/C Condensing unit does not run Repair
Amana Central Air Conditioner Condensing unit does not run
An Amana central air conditioner condensing unit does not run, the compressor is the first listed possibility, although compressor failure is not common. The compressor circulates refrigerant between the outdoor condenser coil and the evaporator coil in the furnace or air handler. A failed wall thermostat can also prevent the furnace and outdoor condensing unit from operating, followed by a defective condenser fan motor. Check whether the condenser fan blade turns freely, since seized bearings can indicate a failed motor. If the unit has power but the contactor, fan, and compressor do not run, a sealed system problem or low refrigerant may have tripped the low pressure switch. A high or low pressure switch itself is less common. Testing components with a multimeter can help, but the disconnect box and condensing unit contain 240V line voltage, so shut off power and avoid live electrical testing unless qualified. Refrigerant diagnosis, sealed-system repairs, pressure-switch replacement, and compressor replacement require EPA 608 certification and a licensed HVAC technician. Enter your model number to find the exact Amana replacement compressor, thermostat, condenser fan motor, fan motor, or pressure switch for your central air conditioner.
01 - Amana 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 - Amana 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 - Amana 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 - Amana 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 - Amana 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 Amana outdoor AC unit not running?
What should I check when the condenser fan is not spinning?
Could the compressor be the reason my AC condensing unit will not start?
Can low refrigerant or a pressure switch keep the outside AC unit from running?
How do I identify the correct Amana AC replacement part?
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