What is this?
Panel heaters are slim electric heaters that use convection to heat a room. They can be wall-mounted or freestanding and are popular in flats and rented accommodation. When a panel heater stops working, the cause is usually a simple electrical issue such as a blown fuse or thermostat fault.
Common causes
- Blown fuse in the plug or fused spur
- Internal thermostat fault
- Failed heating element
- Loose wiring connection at the terminal block
- Electronic programmer or timer fault
- Internal thermal cutout has tripped due to overheating
Is it dangerous?
A panel heater that has stopped working is not dangerous. If you notice a burning smell, discolouration on the cable or plug, or the heater was making unusual sounds before failing, switch it off and do not use it until checked.
Can I fix it myself?
Check and replace the plug fuse (usually 13A). Ensure the thermostat is turned up and any timer is active. For freestanding models, try a different socket. Check that nothing is blocking the heater's air intake or outlet (at the bottom and top) as overheating can trigger the thermal cutout. Let it cool and try again.
When to call an electrician
Call an electrician if the fuse blows again, if the circuit trips when the heater is turned on, if the heater is hardwired and you cannot check the fuse, or if simple checks have not resolved the issue.
What will an electrician do?
Test the power supply to the heater
Check the fused connection unit and wiring
Test the heating element for continuity
Check the thermostat and thermal cutout
Replace faulty components or recommend replacement
Typical cost
£60 – £180
Fuse and connection repairs are inexpensive. Element or thermostat replacements depend on the model. Budget panel heaters are often cheaper to replace than repair.
