Xtramax HE Range High
Your boiler is struggling to circulate water quickly enough, likely because the temperature is rising too fast or the pump is underperforming.
Technical description: F24
Typical repair cost: £150-£350 (including labour)
DIY fix possible
Check that all radiator valves (TRVs) are fully open to help water flow.Verify that the boiler pressure is between 1.0 and 1.5 bar on the display.Restart the boiler to see if the fault clears temporarily.
Protect yourself from future repair bills
A boiler cover plan would cover faults like Xtramax HE Range — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation pump
- Heat exchanger (scaling)
- Flow/Return thermistors
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