Tempstar ductless mini-split indoor unit displays F6 and compressor does not start

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

Shorted compressor windings, Failed inverter power module, Loose compressor wiring, Overvoltage or undervoltage supply

Safety first: Turn OFF power at the main breaker and outdoor disconnect. High-voltage DC is present in inverter systems and is dangerous.

Homeowner actions:

1. Do not repeatedly reset: Avoid cycling power repeatedly; this can worsen damage.
2. Visual inspection only: With power off, remove the outdoor panel and look for burned components or wiring on the inverter board.
3. Call a professional: F6 requires specialized testing of the compressor and inverter module. Contact a Tempstar-qualified technician.

Professional Required 5/5

Inverter Power Board

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