224 V High
Your boiler has switched itself off because it has detected it is getting too hot, usually caused by the water pressure being too low.
Technical description: Safety temperature limiter has tripped – top-up water until the reset pressure is reached
Typical repair cost: £0-140 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boiler or the digital display.Locate the filling link (usually a blue lever underneath the boiler or a white plastic key).Slowly top up the water pressure until it reaches between 1.0 and 1.5 bar.Press the 'Reset' button on the boiler display to clear the fault.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 224 V — no call-out fees, no surprises.
*Affiliate links — we may earn a commission at no extra cost to you. Prices shown are starting prices.
Parts commonly replaced
- External Filling Loop
- Overheat Thermostat
- System Pump
*Affiliate links — we may earn a commission at no extra cost to you.