Haier
Control Board or Start Circuit Failure
Interior lights work but compressor and fans do not run; no cooling.
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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
Main PCB not sending run signal, Failed compressor start relay, Open door switch preventing fan operation, Faulty temperature sensor causing control lockout
How to Fix / Troubleshooting
Safety: Unplug the refrigerator before accessing control boards or compressor components.
Steps:
- 1. Check door switches: Ensure door switches are working (lights turn off when pressed). A stuck switch can prevent fans from running.
- 2. Listen for relays: After plugging in, listen near the control board for relay clicks. No clicks may indicate a control issue.
- 3. Test start relay: Inspect and test the compressor start relay/overload as described in the compressor not running entry.
- 4. Sensors: A failed sensor reading extreme values can prevent cooling. Test refrigerator and freezer sensors and replace if faulty.
- 5. Replace PCB: If start components and sensors are good but the board never energizes the compressor or fans, replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (PCB)
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