Transtherm No Power / Main Supply Failure

Wine cooler is completely dead: no display, no light, no sound

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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

Blown internal fuse on main control board, Faulty power cord, Tripped circuit breaker, Failed main control board power supply section

How to Fix / Troubleshooting

Safety: Ensure the outlet is not live before handling the plug; always unplug before opening panels.

Steps:

  • Check external power: Test the wall outlet with another appliance. Reset any tripped breakers or GFCI outlets.
  • Inspect power cord: Look for visible damage along the Transtherm power cord. Replace the power cord if damaged.
  • Access control board: Remove the control cover and locate the small fuse on the main PCB. Test it with a multimeter and replace with the same rating if blown.
  • Evaluate board: If the fuse blows again immediately or there is no low-voltage output, the main control board is likely faulty and should be replaced.

Warning: Never bypass or upsize the fuse; this can cause fire or further damage.

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Repair Difficulty

Medium 3/5

Required Part

Main Control Board
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