Your consumer unit is doing exactly what it was designed to do. An RCD trips when it detects current escaping where it should not go — through water, a damp casing, or a failing element — because that same path could run through a person. So the rule for this fault is absolute: unplug the machine, leave it unplugged, and get the leaking component found and replaced. This is the one washing machine fault where "see if it happens again" is genuinely bad advice.
When it trips tells you the culprit
Trips when the water heats (10–20 minutes in)
The classic pattern. The heating element is a metal-sheathed coil; limescale builds on it, the sheath corrodes or splits, water reaches the live element inside, and current leaks to earth the moment it heats and expands. If the trip arrives reliably once the wash water warms up, the element is suspect number one. The same element failure in its earlier stage shows up as washing machine not heating — the two faults are often the same part at different moments.
Trips the moment the motor starts
Motor insulation breaks down with age, heat and damp. A motor that trips the RCD as the drum begins to turn — on wash or spin — needs insulation testing, and usually replacement.
Trips on drain or intermittently
The drain pump is a small sealed motor sitting in water by design; a cracked pump housing leaks current too. Intermittent trips with no clear pattern can also be water where it should not be — check for a leak underneath the machine (see washing machine leaking) before assuming electronics.
What to do — and what not to do
- Unplug the machine and leave it unplugged. Do not run "one more load to check".
- Note when in the cycle it trips: immediately, on heating, on spin, on drain. That timing is the diagnosis shortcut.
- Confirm it is the machine: with the washer unplugged, reset the RCD. If the power stays on with everything else running, the washer is the source. If it still trips with the washer unplugged, you have a different faulty circuit — call an electrician, not an appliance engineer.
- Never bridge, tape or bypass an RCD, and never move the machine to a non-RCD socket to "get the wash done".
One more distinction matters: if the whole house loses power, or the switch that trips is the main switch rather than the RCD protecting the sockets circuit, note it and tell us. Patterns like that can point at the supply or the consumer unit rather than the appliance, and if the machine insulation-tests clean on our visit we will say so and route you to an electrician instead of selling you a part.
Keep children and pets away from a machine that has tripped until it is unplugged and checked — current leaking to a casing you can touch is exactly the situation the RCD exists to catch.
The Dublin angle
Hard water is the accelerant here. Areas normally supplied by Leixlip — Swords, Lucan, Finglas — receive water around 200 mg/L, and Bog of the Ring areas like Balbriggan, Rush and Skerries around 336 mg/L, which is very hard: elements fur, overheat, split and earth-fault years earlier than on the soft Ballymore Eustace supply (~50 mg/L) in South Dublin or the Vartry/Ballymore blend (around 75 mg/L) in Dublin 4 and Dún Laoghaire. Older housing compounds it: with 70.7% of Dublin homes pre-2001, many machines run in damp utility rooms, extensions and hot press conversions where condensation keeps casings and motors damp — ideal conditions for insulation faults.
What it typically costs in Dublin
Typical Dublin ranges, checked November 2026. Fixed price confirmed after diagnosis, before work; call-out fee stated when booking.
- Heating element replacement: €179–€249
- Drain pump replacement: €149–€199
- Motor replacement: €279–€420
We insulation-test before replacing anything, so you are not paying for a guessed part. Full pricing on our repair costs page.
When to call us
Call Dublin Washing Machine & Fridge Repair on 645 465-6305 the day it trips — this fault does not improve and the machine should stay unplugged until it is fixed. Book via washing machine repair Dublin and tell us when in the cycle the trip happens. If the trip persists with the machine unplugged, that is a job for a registered electrician instead, and we will tell you so on the phone. Guarantee in writing on every repair.
