hOmeLabs
Control Board Lockup or Overheat Protection
Unit cools initially but then stops cooling until power is cycled.
Advertisements
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.
Advertisements
Possible Causes
Main board overheating, Firmware glitch, Failing thermistor causing logic error
How to Fix / Troubleshooting
Unplug the unit before accessing the control board.
- Observe pattern: Note how long the unit cools before stopping and whether the display remains on.
- Check board ventilation: Ensure the rear panel vents are not blocked and that the main board area is not excessively hot.
- Reset power: Unplug for 10 minutes to reset the board. If the problem recurs regularly, suspect a failing board.
- Sensor check: Test the cabinet thermistor for intermittent readings by gently moving the harness while monitoring resistance. Replace the cabinet thermistor if readings jump.
- Replace main board: If sensors are stable but the unit only recovers after power cycling, replace the main control board.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Main Control Board (PCB)
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements