Russell Hobbs microwave keeps blowing the fuse
My Russell Hobbs microwave, just over a year old — it trips the plug fuse / RCD as soon as I start it. Is this something I can fix myself or do I need an engineer?
Solution Summary
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Russell Hobbs microwave trips fuse or RCD when started
- The problem
- A Russell Hobbs microwave, just over a year old, blows the plug fuse or trips the RCD as soon as Start is pressed.
- Likely cause
- The accepted reply says this usually indicates a serious internal fault. The most strongly supported possibilities mentioned are the door interlock switch system or a high-voltage side fault, such as the capacitor, diode, transformer, magnetron, or wiring. The exact failed part was not confirmed.
- What fixed it
- Basic external checks were suggested: try a different wall socket, avoid an extension lead, check whether the trip happens exactly when Start is pressed or when the door is opened or closed, and inspect the plug, fuse and mains lead for visible damage. No internal DIY repair was confirmed. Further diagnosis should be carried out by a suitably qualified appliance engineer. Replacement may be more economical depending on repair cost, but no repair outcome was documented.
- Checks to try
- Tried or advised to try a different known good wall socket
- Advised to avoid an extension lead
- Advised to note whether it trips on Start or when opening/closing the door
- Advised to inspect the plug and mains lead for burning, damage or crushing
- Advised to confirm the plug has the correct 13A fuse fitted
- Parts or tools mentioned
- 13A plug fuse
Safety: Microwaves can retain dangerous high voltage even when unplugged, so internal testing or repair is not suitable for DIY unless properly trained.
1 Answer
If it trips the fuse or RCD the moment you press Start, that usually points to a serious internal fault rather than something simple like the door not closing properly. On a microwave, the common causes are the door interlock switches, high-voltage capacitor, high-voltage diode, transformer, magnetron, or wiring fault.
Before doing anything internal, isolate it from the mains. Microwaves can retain a dangerous high voltage even when unplugged, so they are not a good DIY appliance unless you are properly trained.
A few sensible checks you can do first:
1. Try a different socket Use a known good wall socket, not an extension lead. If it still blows the plug fuse or trips the RCD immediately, the fault is almost certainly inside the microwave.
2. Note exactly when it trips If it trips as soon as Start is pressed, that often suggests a high-voltage or interlock fault. If it trips when opening/closing the door, that more strongly points to the door switch system.
3. Check the plug and lead Look for signs of burning, damage, or a crushed mains lead. Also confirm the plug has the correct 13A fuse fitted.
4. Inspect for obvious internal signs only if competent After isolating from the mains, a trained person might look for burnt terminals, damaged door switch mounts, or shorted components. But I would not recommend DIY testing of microwave high-voltage parts.
Because this involves mains and high-voltage circuitry, I’d strongly advise a qualified engineer. Depending on age and repair cost, replacement may be more economical than repair.
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This answer was generated automatically by the WhitegoodsHelp AI Assistant. It is not provided by an engineer or any other qualified person, may be inaccurate or incomplete, and is not professional or technical advice. Do not rely on it. Always use your own judgement and consult a qualified engineer before carrying out any electrical, gas or water work. Use is entirely at your own risk. See our full Terms of Use.
SAFETY FIRST: READ BEFORE ACTING ON THIS GUIDANCE
Never work on a live appliance
Always unplug it at the mains before going near it with any tools.
Never attempt gas work
By law, gas appliances must only be worked on by a Gas Safe registered engineer. If your fault involves gas, stop and call a professional. Do not attempt it yourself.
Watch for sharp edges
Outer panels are smooth, but internal parts have sharp machined edges. Wear protective gloves and arm sleeves.
Water appliances can leak
Turn off the water supply before disconnecting any hoses.
Know your limits
If you are not confident testing or working inside the appliance, stop and call a professional.
AI guidance, not guaranteed
This response is generated automatically by the WhitegoodsHelp AI Assistant. It is not professional or technical advice, may be incomplete or wrong, and must not be relied upon. Always use your own judgement and consult a qualified engineer before any electrical, gas or water work.
This is general information only and is not professional advice. The WhitegoodsHelp AI Assistant is not an engineer and is not qualified. See our full Terms of Use.
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