Heating problems
Heating system is noisy or bubbling: causes and what to do
Bubbling, knocking or whistling points to air, scale in the heat exchanger or wrong pump settings. Fixing it in time protects the boiler or heat pump.
Answer in 1 working day
How to recognise it
What you see – and what it usually means
Bubbling in the pipesair in the system
Knocking in the boiler while heatingscale in the heat exchanger – cleaning
Whistling at thermostatic valvespump head too high – adjustment
Likely causes and the right service
You can safely check
- Check the pressure gauge (usually 1–2 bar for a cold system – see the manual).
- Check that radiator thermostatic heads and manifold valves are open.
- Note the error code and photograph the rating plate.
We do not give repair instructions: gas, electrical and pressurised systems are serviced by qualified specialists.
Smell gas? Do not switch anything electrical, close the gas valve if safe, open windows, leave and call 112.
Fault reporting
Report it in a minute – follow the status online
Choose the system and symptoms, add the error code and a photo. You get a number, a status page and a direct line to the technician. No heating in winter or a leak gets top priority.
- 1System
- 2Symptoms and code
- 3Photo
- 4Contact
3D
See where the problem sits
The 3D house shows the heat source, pump group, manifolds and radiators with water flows – it is easier to understand what the technician will check.
Diagnostics3D · System flushingHeating system with flows
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