If your boiler is running but you have no heating, no hot water, or only one working but not the other, the issue may be more specific than a full breakdown.
Different symptoms point to different faults. Identifying the pattern helps narrow down the cause.
If both have stopped completely, common causes include:
Check the boiler display for fault codes and ensure pressure is above 1 bar. If the boiler will not restart, professional diagnosis is required.
If hot water stops suddenly during use, possible causes include:
Boiler overheating and cutting out
Flame detection issues
Gas supply interruption
Pressure drop
Contact a Gas Safe engineer if:
The boiler display shows a fault code
Pressure keeps dropping
The system locks out repeatedly
There is water leaking from the boiler
The issue persists after basic checks
When attending a heating or hot water issue, we assess:
System pressure
Circulation and pump operation
Diverter valve function
Gas rate and combustion
Electrical controls
If your radiators are heating but taps run cold, the likely causes include:
This is common in combi boilers and usually requires internal component repair.
If you have hot water but radiators remain cold, possible causes include:
This is often a circulation or control issue rather than a full boiler failure.
We aim to offer same-day appointments where availability allows. Emergency breakdowns are prioritised.
F.75 usually indicates a pressure change detection issue, often linked to the pump or pressure sensor.
Pressure loss may be caused by leaks, expansion vessel failure or pressure relief valve issues.
Yes. All gas work is carried out by a fully qualified Gas Safe registered engineer.
We repair most major domestic boiler brands including Worcester Bosch, Vaillant, Ideal and Baxi.
If your heating system is not working correctly, contact us today.
