Trane Compressor Not Starting

Trane air conditioner outdoor fan runs but compressor does not; no cooling is produced.

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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

Failed compressor, Open compressor thermal overload, Bad start capacitor or hard start kit, Loose compressor wiring

How to Fix / Troubleshooting

Safety first: Turn off power at the disconnect before touching any components.

  • Check capacitor: Inspect and test the dual run capacitor and any separate start capacitor. Replace if out of spec or visibly damaged.
  • Inspect wiring: Ensure compressor terminals are firmly connected and not burnt. Replace burnt terminals with proper kits.
  • Cool down: If the compressor is very hot, allow it to cool for an hour, then try restarting.

If the compressor still will not start, a Trane technician should test it with proper instruments and determine if replacement is needed.

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Repair Difficulty

Hard 4/5

Required Part

Trane Scroll Compressor
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