GETTA Help
No hot water? What to check
No hot water does not always mean the boiler has failed. First establish whether heating is also affected, whether the appliance has power, and whether a clear fault code is displayed.
Checks that do not involve opening the appliance
- Try more than one hot tap and check whether cold water still runs normally.
- Check whether central heating works and whether a timer or thermostat setting has changed.
- Look at the boiler display for a fault code and check the pressure shown.
- Check your consumer unit only from a safe, dry position. Do not handle electrical controls if they are wet.
- If you use a hot-water cylinder, check its normal programmed times and controls.
What the pattern may suggest
Hot water and heating failing together can point to a wider loss of power, fuel supply or boiler operation. Heating working while hot water does not may indicate a control, valve, sensor or hot-water-system problem. These are possibilities rather than a diagnosis.
Avoid unsafe investigation
- Do not remove the boiler cover, work on gas components or bypass safety systems.
- Do not keep resetting an appliance that repeatedly locks out.
- If you suspect the gas appliance is unsafe, turn it off and arrange a check by a suitably qualified Gas Safe registered engineer.
Useful details for a professional
- Boiler or cylinder type, make and model
- Whether heating works
- Any pressure reading or fault code
- When the problem began and whether it is intermittent
- Any recent plumbing, power or boiler work