D.24 Medium
Your boiler is struggling with water flow, likely due to a build-up of debris or air in the system which is preventing the heat from circulating properly.
Technical description: Not relevant
Typical repair cost: £80-250 (including labour)
DIY fix possible
Check that all radiator valves are fully openBleed your radiators to remove any trapped airEnsure the boiler pressure is between 1.0 and 1.5 bar on the gauge
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.24 — no call-out fees, no surprises.
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Parts commonly replaced
- Central heating pump
- Magnetic system filter (cleaning)
- Automatic air vent
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