Roca No Power / Dead Furnace

Furnace will not start at all, no display or lights on the control panel

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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 circuit breaker, Blown internal fuse on Roca PCB, Loose power cable, Faulty main switch

How to Fix / Troubleshooting

Safety first: Before opening the unit, verify the breaker is off. Use a non-contact tester if available.

  • Check external power: Confirm the wall switch (if fitted) is on and the circuit breaker has not tripped. Reset if necessary.
  • Inspect power cord and plug: For plug-in models, ensure the plug is fully inserted and the outlet works (test with another device).
  • Internal fuse: With power off, open the electrical compartment and locate the PCB fuse. If blown, replace only with the same type and rating. If it blows again, there is a deeper fault.
  • Check main switch: Test the furnace’s main power switch for continuity. Replace if defective.

Warning: Repeated fuse blowing indicates a short circuit. Do not keep replacing fuses; call a technician.

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Repair Difficulty

Medium 3/5

Required Part

Internal Fuse / Main Switch
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