Overload, short circuit or leakage
A breaker that trips when a kettle, heater and washing machine run together may be overloaded. Immediate tripping after one appliance starts more often suggests a fault in that appliance, outlet or cable.
An RCD or RCBO may trip because of moisture, damaged insulation or leakage to an appliance body. The device label alone is not enough for a diagnosis.
Safe steps before the electrician arrives
Unplug appliances on the affected circuit. Reset the breaker once with no load. If it remains on, reconnect appliances one by one and leave the suspect item disconnected.
If it will not reset unloaded, or you notice heat, crackling or a burning smell, leave the circuit off. Do not remove the consumer-unit cover.
Why a washing machine may trip the breaker
Possible causes include the heating element, filter, motor, cable or outlet. Note the stage of the programme: a fault that appears only when heating starts is useful diagnostic information.
Do not use an unsuitable extension lead or fit a higher-rated breaker. The circuit, earthing, protection and appliance must be checked.
How the fault is diagnosed
The electrician inspects the board, terminals and heat damage, then tests load, insulation resistance, outlets and circuit sections. The aim is to identify the cause, not merely replace the breaker.
Breaker rating must suit the cable size and installation method. A larger breaker can leave undersized wiring unprotected.
Information to send with the booking
Photograph the board so labels are legible. Say which appliance was running, how quickly it tripped and whether there was heat, sound or smell.
Frequently asked questions
Can I reset the breaker repeatedly?
No. One controlled test without load is enough. Repeated attempts may worsen damage.
Will a larger breaker solve it?
Not safely without checking the cable. The breaker protects the wiring and must not be upsized simply because it trips.
Why does it trip after several minutes?
Delayed tripping can indicate overload, a heating connection or a fault that appears during one stage of appliance operation.
When should I turn off the main switch?
If there is smoke, severe burning smell, arcing or heat at the board, turn off the main supply only if you can approach it safely and call an electrician.