Northair Compressor Start Circuit Failure

Unit displays lights but the compressor never starts; only the fan and pump run.

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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 start relay, Open overload protector, Loose compressor wiring, Faulty compressor windings

How to Fix / Troubleshooting

Safety: Unplug the unit before accessing the compressor compartment. Capacitors and mains voltage are present.

Steps:

  • Access compressor: Remove the rear panel to expose the compressor and its start components.
  • Inspect start relay and overload: Check for burn marks or melted plastic. Reseat connectors.
  • Test components: With a multimeter, test the start relay and overload protector for continuity according to specifications. Replace if open or shorted.
  • Check compressor windings: Measure resistance between compressor terminals (C, R, S). Infinite or zero readings indicate a bad compressor.

Warning: If compressor windings are faulty, compressor replacement is a sealed system repair that should be done by a licensed technician.

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Repair Difficulty

Hard 4/5

Required Part

Compressor Start Relay
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