Six common heating pump problems and how to fix them

You know the problem – your central heating pump suddenly starts making strange noises and your system isn’t working properly. It can be relatively easy to fix some of the most common heating pump problems with a bit of know-how and the right tools, so let’s get started.


Image Credit

1. Airlocks

The most common cause of strange noises is an airlock. When air builds up in the system, it stops the pump working properly. If you hear a constant humming, you need this quick fix.

Locate and open the bleed screw a quarter turn. Work slowly, as there is water in the pump. If this doesn’t fix the noise, try anti-vibration brackets.

2. No power

If your boiler has power but the pump doesn’t, it is likely you have a wiring issue. Check the fuse. If this hasn’t blown, check the pump for leaks. If your pump seems to be corroded, call a Gas Safe engineer from a reputable company such as to take a look.

3. The pump isn’t pumping

If your pump is hot to the touch and has stopped vibrating gently, the chances are that the propeller on the pump is stuck. Try giving the pump a gentle tap to unstick the propeller. If this doesn’t work, or if your pump seizes frequently, the chances are that you need a replacement. It is worth paying out for boiler repair Cheltenham and getting a replacement pump.

Image Credit

4. The system is clogged with dirt and debris

Over time, all central heating systems accumulate dirt and grime from pipework and radiators. This is a relatively simple problem to fix but needs doing before the sludge in the system can cause permanent damage.

Try a DIY flush of the heating system to clear the debris.

5. Leaking pump

Pumps can leak for a range of reasons, including incorrect settings that cause your pump to blow a seal. Start by checking that the pump is secure, then check the joint and make sure no corrosion is present. In the event of a leak, you will probably need a new pump.

6. Incorrect installation

It might be that your pump has been fitted the wrong way round. If this is the case, you will need to drain down the system and then get the pump reinstalled correctly.