Tosot Compressor Non-Start Condition

Unit powers on but compressor never starts, only fan runs

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.

Possible Causes

Failed inverter compressor, Faulty outdoor inverter PCB, Open compressor winding, Low or high pressure protection preventing start

Safety first: Turn off power at the outdoor disconnect. Compressor diagnosis should be done by a professional.

Listen for operation: When calling for cooling, listen at the outdoor unit. If only the fan runs and no compressor hum or vibration is felt, the compressor is not starting.
Visual inspection: Check for burnt wiring or terminals at the compressor.
Professional testing: A technician should measure compressor winding resistance, check for ground faults, and verify inverter output. Replace the compressor or inverter PCB as indicated.

Professional Required 5/5

Inverter Compressor

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