Siemens No Power / Main Supply Failure

Refrigerator not running at all; display off; interior lights off; no sounds.

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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 household circuit breaker, Faulty power cord, Blown internal fuse on main PCB, Defective main control board power supply

How to Fix / Troubleshooting

Safety first: Ensure your hands are dry and the floor is not wet when working with electrical outlets.

Steps:

  • 1. Check outlet: Plug a lamp or other appliance into the same outlet to confirm power is present.
  • 2. Inspect cord and plug: Look for visible damage, burns, or loose plug blades. Replace the cord if damaged.
  • 3. Reset breaker: Check your home’s breaker panel or fuse box and reset any tripped breaker associated with the kitchen or refrigerator circuit.
  • 4. Internal fuse: If the outlet and cord are good, unplug the fridge, remove the rear control cover, and look for an internal fuse on the main PCB. Replace only with the same type and rating if blown.
  • 5. Main PCB: If the fuse is intact and there is still no power, the main control board’s power supply may have failed and require replacement.

Warning: If the new fuse blows immediately, do not keep replacing it; there is likely a short that needs professional diagnosis.

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Repair Difficulty

Medium 3/5

Required Part

Main Control Board (PCB)
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