Why does my tumble dryer keep tripping the electrics?

Most often the heating element is leaking current to earth, which trips the RCD. Moisture inside the machine, a motor fault or a damaged lead can do the same. If a circuit breaker trips instead, the dryer or circuit is overloaded or has a short.

Why does my condenser dryer trip the electrics?

Condenser dryers have the same element and motor faults as vented ones, plus a water container and pump. A leak or overflow can let water reach electrical parts and trip the RCD. Empty the container, clean the condenser, and stop using the dryer if it still trips.

My tumble dryer trips the electrics halfway through a cycle. Why?

That usually means the fault appears once the heating element is hot, which points to failing element insulation. If the house stays on and only the dryer stops, it is more likely the dryer's own overheat cut-out, often from lint build-up.

Can I plug my tumble dryer into an extension lead?

No. Electrical Safety First advises against running a tumble dryer from an extension lead because it draws a lot of power and can overload the lead. Plug it straight into a wall socket.

Is it the dryer or my electrics?

Unplug the dryer and reset. If the trip still happens with it unplugged, the fault is in the wiring. If it only trips when the dryer runs, stop using the dryer and book an appliance repair engineer.

Are tumble dryers a fire risk?

They can be, especially with lint build-up or when left running unattended. Clean the filter after every use, keep vents clear, register the dryer with the manufacturer and check for recalls.

Tumble Dryer Tripping The Electrics

A tumble dryer that trips the electrics usually has an earth leakage fault, most often a failing heating element or damp inside the machine. Unplug it, reset the trip, and do not use it again until it is checked. If the trip still happens with the dryer unplugged, the fault is in the wiring: call an electrician.

Caution

Blake FolgadoCo-founder, Tradehand

Published 1 February 2026Updated 22 September 2026

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What's happening?

Look at which switch goes off, because it tells you the kind of fault. If the RCD (the switch with a T or Test button) trips, current is leaking to earth. In dryers that is usually a heating element whose insulation has broken down, a motor or wiring fault, or water from a condenser or heat pump model reaching live parts. If a circuit breaker (MCB) or a plug fuse goes, the dryer is drawing too much current: a short in the element or motor, or the dryer sharing an overloaded circuit or extension lead. A dryer that simply stops mid-cycle while the house stays powered is usually its own thermal cut-out after overheating, often from lint build-up, which is a different problem. Condenser and vented dryers trip for the same reasons; condenser models add the water tank and pump as extra sources of leakage.

What usually causes it?

A heating element with failed insulation leaking current to earth
Water from a condenser box, pump or heat pump unit reaching electrical parts
A motor, door switch or internal wiring fault
A damaged plug, flex or socket, or a dryer run through an extension lead
Too many high-power appliances on the same circuit at once
A fault in the fixed wiring or socket if other appliances trip there too

Is it dangerous?

Treat it as a fault that needs fixing, not something to reset and carry on. Fire services publish specific tumble dryer safety advice, and Electrical Safety First advises cleaning the lint filter after every use and not running a dryer overnight or when you are out. A dryer that trips the RCD is leaking current where it should not, and repeatedly resetting it risks a shock or fire. If the dryer smells of burning, smokes or feels hot on the outside, unplug it and keep it closed.

Can I fix it myself?

1. Unplug the dryer and reset the RCD or breaker. 2. Leave the dryer unplugged and check the rest of the house stays on. If it trips with the dryer unplugged, the dryer is not the cause: call an electrician. 3. If the house stays on with the dryer unplugged, treat the dryer as the fault and do not run it again to test it. Never plug it into an extension lead. 4. Clean the lint filter and around the door seal, and on condenser models empty the water container and clean the condenser unit as the manual shows. 5. Check the model against the Electrical Safety First recall list. If it still trips, stop using it and book an appliance repair engineer. Do not remove the back panel with it plugged in.

When should you call an electrician?

Call an electrician if the trip happens with the dryer unplugged, if other appliances trip the same socket or circuit, if the socket or plug is scorched or hot, or if the RCD will not reset. If the trip only happens when the dryer runs, the dryer itself needs an appliance repair engineer or replacing.

What will the electrician actually do?

Confirm whether the fault is in the dryer or in the fixed wiring
Test the socket and circuit for earth leakage, polarity and insulation resistance
Check the plug, fuse and socket for heat damage and replace as needed
Check the RCD trips correctly and within time
Advise whether a dedicated circuit or socket would suit the laundry area
Recommend an appliance repair or replacement if the dryer is leaking to earth

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