Appliance Repair HubFind · Fix · Decode

Microwave

Microwave sparking? 2 likely causes

Stop using it straight away.

Symptom: Sparks or arcing inside · Typical cost: £0–£100.

Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.

Likely causes, most common first

  1. 1

    Damaged waveguide cover or food residue

    DIY: moderate

    Burnt-on food arcs.

    The fix:Clean it or replace the cover.

  2. 2

    Metal or foil inside

    DIY: easy

    Arcing.

    The fix:Remove metal.

When to call an engineer

  • Stop using immediately
  • You are not comfortable working on the appliance, or the fix involves electrics or gas.

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Frequently asked questions

How much does it cost to fix a microwave problem like this?

£0–£100.

Is it safe to keep using it?

If you can see leaks, smell burning, or the appliance is tripping the electrics, stop using it and unplug it. For minor faults without those signs it is usually safe to leave it off until you can diagnose it. Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.