Fault-Finding Your Central Heating System

Typical faults include:

  • Not all the radiators are hot enough
  • I’ve found a fault code displayed on my boiler
  • My boiler is leaking or dripping
  • I keep losing pressure on my boiler
  • My hot water cylinder is leaking
  • My boiler is making strange noises

We have given suggested answers to some of these below.

If in doubt, don’t delay!

Call Gregor today on 0117 935 2400 to arrange for one of our expert heating engineers to visit your home.


Helpful Hints and Tips

Owners of Worcester Bosch boilers can find some valuable self-help videos on topics such as how to repressurise boilers and how to thaw and prevent frozen condensate pipes on the company’s official Youtube channel. If you would like some more information about this, please read our blog on the subject.  

The radiator may have air trapped in it and need bleeding.

If only one radiator is affected and you have the know-how to safely bleed radiators, you may be able to manage this yourself. If you don’t feel confident about doing this, you may wish to call on the help of a friend or relative who is experienced at the task.

Alternatively, you are welcome to contact us to arrange an appointment. Because this is not an emergency, we cannot offer you a priority call-out for this, but we are happy to book an appointment so one of our engineers can carry this out.

If the problem persists after your radiators have been bled, then please call us to book a health check on your central heating system, so we can check to see if there is a fault.

If you are unsure on how to set up your time-clock, then we can arrange a phone call with one of our Technical Advisors. If after this you would still like a visit to help set it up, we can arrange for an appointment.

If your boiler persistently loses pressure, then please call us. There could be a problem that requires a repair.

If you have been away for a long time and you have returned and your boiler isn’t working due to low water pressure, please top the pressure up in accordance with your boiler manufacturer’s instructions – which is usually to between 1 & 1.5 bar. Then monitor the pressure to ensure it doesn’t increase or decrease.

If you are unsure about how to top your pressure up, then we are happy to arrange for one of our Technical Advisors to give you a call.

If there is a leak, we always advise that you turn off the water at the main stopcock. Please call our office!



Additional Boiler Fault-finding Resources

See also our further guides on these pages:


Understanding your Heating System

Have you recently moved into the property and don’t know how your heating system works?

  • Our expert engineers can help set up your heating controls, and will explain to you how the system works, and help you manage it for optimum performance and efficiency.

Are you happy with the costs of running your heating system?

  • We can help with advice on how to run your system more efficiently, improving your comfort and reducing costs.
  • This might involve a combination of a system flush, filters, or smart controls.