Glow-worm High inrush current / electrical fault

Furnace causes lights to dim or trips breaker 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

Seized pump or fan causing high start current, Short circuit in Glow-worm PCB, Incorrect breaker rating, Shared circuit overloaded

Safety: Repeated tripping indicates a fault. Do not keep resetting the breaker.

User steps:

Note when the breaker trips (on start-up, randomly, etc.) and inform the engineer.

Technician steps:

Check pump and fan for free rotation and normal current draw.
Inspect wiring and PCB for shorts or burnt components.
Verify that the circuit breaker and cable are correctly rated for the appliance.

Hard 4/5

Fan / Pump / Main PCB

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