Amana Cooling Call Not Reaching Outdoor Unit

Thermostat calls for cooling but only the indoor fan runs; outdoor unit does not start

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Open Y1 circuit between Amana control board and outdoor unit, Tripped high- or low-pressure switch on outdoor unit, Blown low-voltage fuse from short in Y1 wiring, Failed contactor coil in Amana condenser

How to Fix / Troubleshooting

Safety first: Turn off power to indoor and outdoor units before opening panels. Outdoor unit contains high voltage.

  • Step 1 – Listen for outdoor unit: When cooling is called, check if the outdoor fan or compressor attempts to start.
  • Step 2 – Check fuse on control board: Replace blown low-voltage fuse if necessary and look for shorts in Y1 wiring.
  • Step 3 – Inspect low-voltage wiring at outdoor unit: Ensure the two low-voltage wires from the indoor unit are securely connected to the contactor coil terminals.
  • Step 4 – Test contactor (advanced): With power off, inspect the contactor for burnt or pitted contacts. With power on and a call for cooling, measure voltage at the contactor coil. If 24V is present but the contactor does not pull in, replace the contactor.

When to call a professional: Work inside the outdoor unit and on refrigerant components should be done by an HVAC technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Amana Condenser Contactor
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