Weishaupt
Electrical Short / Earth Leakage
Water heater trips the household circuit breaker or RCD when it starts.
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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
Shorted pump motor (on combi/storage units), Shorted fan motor, Water ingress on wiring, Faulty control board
How to Fix / Troubleshooting
Safety: Do not repeatedly reset a breaker that trips; identify the fault first.
- Visual inspection: With power off, remove the cover and look for signs of burning, melted insulation, or water leaks onto electrical parts.
- Isolate components: A technician can disconnect suspect components (pump, fan, ignition transformer) one at a time and test if the breaker still trips.
- Dry moisture: If water ingress is found, fix the leak source (e.g., faulty gasket, condensate overflow) and allow components to dry completely before re-energizing.
- Replace faulty part: Replace any component that shows low insulation resistance or visible damage.
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Repair Difficulty
Professional Required
5/5
Required Part
Combustion Fan Assembly
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