Hisense
Outdoor Unit Not Running
Hisense air conditioner powers on but compressor and outdoor unit do not start; only indoor fan runs.
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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
Tripped outdoor breaker or disconnect, Faulty outdoor PCB, Failed compressor contactor (non-inverter models), Broken communication cable between indoor and outdoor units
How to Fix / Troubleshooting
Safety first: Turn off all power before opening the outdoor unit. High voltage is present.
- Step 1 – Check outdoor power:
- Verify the outdoor disconnect is ON and the breaker is not tripped.
- Step 2 – Listen for outdoor activity:
- When the indoor unit calls for cooling, listen for any hum or click at the outdoor unit.
- Step 3 – Inspect wiring:
- With power off, check that the power and communication wires are secure at the outdoor terminal block.
- Step 4 – Technician diagnosis: If the outdoor unit remains dead, a technician should test the PCB, contactor (if present), and compressor.
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Repair Difficulty
Hard
4/5
Required Part
Outdoor Main Control Board (PCB)
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