Riello Electrical Short or Earth Leakage

Boiler frequently trips the household RCD or MCB when starting

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.

Possible Causes

Water ingress into electrical components, Shorted pump or fan motor, Damaged wiring insulation, Faulty ignition transformer

How to Fix / Troubleshooting

Safety: Repeated tripping indicates a potentially dangerous fault. Do not repeatedly reset the RCD without investigation.

Visual inspection: With power isolated, inspect inside the boiler for signs of water, burnt components, or damaged cables.
Dry and fix leaks: If water is present, locate and repair the leak before replacing any affected electrical parts.
Component isolation (technician): A professional can disconnect components (pump, fan, ignition) one by one to identify the faulty item and replace it.

Repair Difficulty

Professional Required 5/5