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Common Boiler Problems

Gas Boiler

Boiler problems can be quite daunting, it can be tempting to try and do a bit of DIY and resolve the issue yourself such as re-adjusting the pressure back into normal range. However you need to bare in mind there are limits to what you can do as an amateur and also any problems you may think you have solved could re occur and something more serious could be causing the problems, so its always a good idea to get a Gas  Safe Registered Engineer to come and check It out to save you a costly repair in the future.

5 Common Boiler Problems

  1. Pressure – Boiler pressure should be around the 1.5 mark in order to work correctly. If there is not enough pressure, then the boiler will not be able to push enough water around the system and lock out. System and combination boilers often show a fault code which can be found in the manual so you can find out what is wrong with the boiler and what could be causing it. You can raise the pressure of your boiler by following instructions in the manual, however you could end up causing more problems if you do it incorrectly so you may want the help of a Gas Safe Engineer.
  2. High Pressure – This is when there is too much water in the system and often happens when too much water has been put in the system after a pressure drop. It could also be a sign of a leaky pressure relief valve. If you don’t feel comfortable following steps in the boiler manual contact your local Gas Safe Plumber.
  3. Boiler in Lock Out Mode – This can be an issue caused by the above and a multitude of other variables. Boilers go into lockdown mode to avoid the boiler becoming totally un repairable or dangerous. This can often be rectified by turning the boiler off for several minutes and then turning it back on. If this doesn’t rectify the issue, then contact Gas Safe plumber to come and take a look to rectify whatever may be causing the problem.
  4. Air in The System – This is bad news for radiators, boilers and components. It is often caused by a build up of limescale from hard water. This can be easily rectified by using chemicals to power flush the system. If you don’t know how to do this then it is best to call in a professional plumber to do it for you.
  5. Heating and Hot Water Not Working – This depends on the type of boiler you have. Combination boilers are a sealed unit, so all the parts are internal, if you are having problems with heating or hot water then it is best to call out a plumber as soon as is convenient.

Conventional Boilers have all the working parts on the outside of the boiler so if you know what is the cause of the problem there is a chance you could rectify it by checking the boiler manual however if you are unsure then it is always best to seek the assistance of a professional plumber.


If you are having problems with or boiler either at home or at your business then contact JWC Plumbing & Heating today – 0151 345 4039

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