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Electric Heater Not Working
Your electric heater has stopped producing heat or will not turn on at all.
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What's happening?
An electric heater that is not working could be a portable convector, fan heater, or a wall-mounted unit that has stopped producing heat. This is one of the most common heating complaints in UK homes, particularly during winter. The issue could be as simple as a blown fuse or as involved as a failed heating element.
What usually causes it?
- Blown fuse in the plug or fused connection unit
- Faulty thermostat not calling for heat
- Failed heating element
- Tripped MCB on the circuit supplying the heater
- Loose wiring at the connection unit or terminal block
- Timer or programmer set incorrectly
Is it dangerous?
An electric heater that simply will not turn on is not dangerous. However, if you notice a burning smell, discolouration around the wiring, or the heater was making unusual noises before it stopped, switch it off at the isolator or unplug it and do not use it until it has been checked.
Can I fix it myself?
Check the obvious things first: is the socket or fused connection unit switched on? Check the fuse in the plug (usually 13A) or the fused spur (usually 13A). Make sure the thermostat is turned up and any timer is set correctly. If it is a portable heater, try it in a different socket to rule out a socket fault.
When should you call an electrician?
Call an electrician if the heater still does not work after checking the fuse and socket, if the circuit trips when you turn the heater on, if there is a burning smell, or if the heater is hardwired and you cannot access the fuse yourself.
What will the electrician actually do?
- Test the supply to the heater to confirm power is reaching the unit
- Check the fused connection unit or plug fuse
- Test the thermostat for correct operation
- Test the heating element for continuity
- Inspect wiring connections for loose or burnt terminals
- Replace faulty components or recommend a replacement unit
What will it cost to fix?
£60–£180
Simple fuse or connection repairs are at the lower end. Replacing a built-in heating element or thermostat will cost more.
Find an electricianFrequently asked questions
We’re happy to answer all your questions.
Why has my electric heater stopped working?
The most common causes are a blown fuse, a faulty thermostat, or a failed heating element. Check the fuse first as this is the cheapest and easiest fix.
How do I check if the heating element has failed?
A qualified electrician can test the element for continuity using a multimeter. If the element has failed, it may be replaceable depending on the heater model.
Should I repair or replace an old electric heater?
If the heater is more than 10-15 years old and needs a new element, it is often more cost-effective to replace it with a modern, more energy-efficient unit.
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