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Cooker tripping the electrics: what our engineers find

Cookers

These figures come from NAC's own repair records: 73 cooker jobs our engineers attended for this fault in the last 12 months. Here is what they found, what fixed it and what it typically cost.

When a cooker trips the electrics, engineers sometimes find that one of the heating elements has worn out inside. The grill element is a frequent culprit, especially when the trip happens as soon as the grill is switched on, but the fan oven element and the lower element in the oven can fail in the same way. As an element ages, its insulation can break down and let electricity leak to earth, which makes the safety switch in your fuse box cut the power. Sometimes an element also breaks completely, so the oven stops heating as well as tripping.

To find the cause, an engineer runs electrical safety tests on the cooker and then tests each element on its own. Disconnecting a suspect element and checking whether the tripping stops shows which part is at fault. It is quite common for several elements to need replacing together.

The faulty elements are then replaced. Sometimes the engineer carries the right part, but often it has to be ordered and fitted at a second visit. Until then, it is safest to leave the cooker switched off and not use it. Once the new parts are in, the engineer heats the oven and grill up to temperature to make sure nothing trips.

Written by our engineers from these jobs.

Jobs attended
73
in the last 12 months
Confirmed repairs
56
This is not a success rate. Jobs inside their 60-day window, jobs still being classified, jobs held for review and visits that didn't end in a repair aren't counted.
Fixed at the first appointment
29%
about 3 in 10 of our repairs
Typical total paid by customers
£159 to £279
including parts and VAT, from 55 repairs

No single cause has enough confirmed repairs behind it yet to show for this fault.

About the price. £159 to £279 is the typical total paid by customers, including parts and VAT: the middle half of what customers paid on 55 of these repairs. Repairs paid for by manufacturers and insurers aren't counted, because that work is charged at contract rates. It's a guide, not a quote. Your engineer confirms a fixed price before any work starts.

Before you check anything yourself

  • Switch the cooker off and unplug it, or turn it off at the isolator switch, before you touch anything. Our guide to safely isolating an appliance walks you through it.
  • If it involves the mains supply, sealed parts, or you're not confident at any point, stop and book a qualified engineer rather than risk injury or further damage.
  • If it's a gas appliance and you can smell gas, don't use it. Open the windows and call the National Gas Emergency Service on 0800 111 999.

A confirmed repair is a job we repaired where 60 days then passed with no engineer called back to it. Faults and causes are classified by an AI model reading our engineers' job notes, with personal details removed first, and checked against a hand-labelled sample of NAC jobs.

Figures from NAC's own repair records, updated 13 November 2026. The most recent job included is from 12 November 2026. How we work out these figures.

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