Baxi Electrical Short or Earth Leakage

Furnace trips the household RCD or blows fuses when starting

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 on electrical components, Shorted fan motor, Damaged pump winding, Faulty PCB causing earth leakage

Safety: Do not repeatedly reset an RCD that trips; this indicates a potentially dangerous fault.

Visual inspection: With power off, inspect inside the Baxi furnace for signs of water leaks onto electrical parts.
Dry and repair leaks: Fix any leaks and allow components to dry thoroughly.
Component isolation: A technician can disconnect fan, pump, and other loads one by one to identify the faulty component.
Replace faulty part: Replace the component causing the short or leakage.

Professional Required 5/5

Combustion Fan or Circulation Pump or PCB

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