Why has my electric boiler stopped working?

Check the consumer unit for a tripped breaker first. Then check the boiler pressure gauge and display for error codes. These three checks identify most common faults.

Do I need an electrician or a heating engineer?

For electrical supply issues (tripping, no power), call an electrician. For internal boiler faults (pumps, valves, pressure), a heating engineer may be more appropriate. Many electricians also work on electric boilers.

Is an electric boiler expensive to run?

Electric boilers cost more to run than gas boilers due to higher electricity prices. However, they are more efficient (nearly 100%), cheaper to install, and require less maintenance.

How long do electric boilers last?

A well-maintained electric boiler typically lasts 10-15 years. They tend to last longer than gas boilers as they have fewer mechanical parts.

Caution

Updated 30 August 2026

Electric Boiler Not Working

Your electric boiler has stopped producing hot water or heating your home.

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What's happening?

Electric boilers heat water using an immersion element and circulate it through radiators or provide domestic hot water. When an electric boiler stops working, you may lose both heating and hot water. Electric boilers are common in flats and properties without a gas supply.

What usually causes it?

Tripped MCB or RCD on the boiler's dedicated circuit
Faulty heating element inside the boiler
Thermostat failure — not calling for heat
Motorised valve stuck or failed
Low water pressure causing the boiler to lock out
PCB (printed circuit board) fault in the boiler

Is it dangerous?

Electric boilers do not carry the same carbon monoxide risk as gas boilers. However, a fault that causes the circuit to trip could indicate an electrical issue such as an earth fault or short circuit. Do not keep resetting the MCB if it trips repeatedly.

Can I fix it myself?

Check the consumer unit for a tripped MCB on the boiler circuit (usually 32A or 40A). Check the boiler pressure gauge — most electric boilers need at least 1 bar of pressure. Check the boiler display for error codes and consult the manual. Make sure the thermostat is set correctly and the timer is on.

When should you call an electrician?

Call an electrician if the boiler's MCB trips when you turn it on, if the boiler displays an error code you cannot resolve, if there is no hot water despite the boiler appearing to run, or if you have no heating during cold weather and need urgent assistance.