1. Why are my radiators cold at the bottom?
Usually caused by sludge buildup (magnetite) restricting flow. The system may need cleaning (e.g. flushing).
2. Why do I have to keep topping up the boiler pressure?
There’s likely a leak in the system or an issue with the expansion vessel. Pressure loss should always be investigated.
3. Why is one radiator not heating up?
Common causes include:
4. Why is my boiler making banging or kettling noises?
This is often kettling, caused by limescale or sludge in the heat exchanger, restricting water flow and overheating it.
5. Why does my heating take ages to warm up?
Usually due to:
Usually caused by sludge buildup (magnetite) restricting flow. The system may need cleaning (e.g. flushing).
2. Why do I have to keep topping up the boiler pressure?
There’s likely a leak in the system or an issue with the expansion vessel. Pressure loss should always be investigated.
3. Why is one radiator not heating up?
Common causes include:
- Blocked boiler, blocked pump, blocked pipework
- Air trapped (needs bleeding)
- Stuck TRV valve
- Poor circulation due to sludge
4. Why is my boiler making banging or kettling noises?
This is often kettling, caused by limescale or sludge in the heat exchanger, restricting water flow and overheating it.
5. Why does my heating take ages to warm up?
Usually due to:
- Poor circulation
- Sludge buildup
- Incorrect balancing
- Undersized or struggling pump