S.54 High
Your boiler has temporarily stopped working because it cannot detect enough water circulating through the system to operate safely.
Technical description: Appliance is within the waiting period of the block operation due to water shortage
Typical repair cost: £100-250 (including labour)
DIY fix possible
Check the pressure gauge on your system and top up the water if it is below 1.5 barEnsure all radiator valves and isolation valves under the boiler are fully openBleed your radiators to remove any trapped air pockets that might be blocking water flow
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.54 — 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
- Circulation Pump
- Water Pressure Sensor
- Automatic Air Vent
*Affiliate links — we may earn a commission at no extra cost to you.