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5 Common Faults in Boilers and How to Fix Them UK

Woking Boiler Installation GU21

Info provided by Flowright Plumbers Woking:

How often do you even think about your boiler?

Many of you are probably guilty of taking your boiler for granted. You just expect that it will always be there to give you heat and provide you hot water supply.

It is not until your boiler gets broken that you realize how your UK home can turn into complete chaos without it. When this happens, you will surely wish that you knew about the common faults in boilers and how you can fix them. Consider calling an engineer out to repair or replace your boiler.

Below are 5 of the common boiler problems you need to watch out for:

  1. No Hot Water or Heating

This can be due to many potential culprits like a broken valve, thermostat, or diaphragm. The first step you can take is to check the thermostat. If there is no problem with the thermostat but there is a broken valve, diaphragm, or airlock, all you have to do is replace it for your boiler to work again.

  1. Lower Boiler Pressure

A leak somewhere in the central heating unit and a damaged pressure relief are common reasons for lower boiler pressure.

This can reduce the efficiency of your boiler and its ability of heating up your house altogether. One common sign of this problem is if the pressure gauge fluctuates below and above the 1 bar mark. This is the first thing you need to check.

  1. Boiler Gets Cut Out

There are times when your boiler may fire up only to switch off or trip in between. It can also happen as a result of low pressure. Make sure that you inspect the pressure gauge if you are experiencing this issue. You just need to re-pressure your unit if the needle is below 1. If there is nothing wrong with the boiler pressure, it is possible that air got trapped. You can bleed the radiators to fix this.

  1. Strange Boiler Noise

Boilers normally produce sounds while it is in operation, particularly if it is firing up. But, if your unit starts to make weird whistling, banging, or gurgling noises all of a sudden, it is recommended to hire a qualified engineer.

Strange boiler noises might be due to a faulty pump, air in the unit, low water pressure, or an accumulation of a limescale called kittling.



  1. Water Leakage

It is never a good sign if there is a leak that comes from your boiler. The reason for this leak depends on where the water comes from. It is a must that you avoid trying to repair this leak in your boiler on your own. This is a job that is best left to the hands of a Gas Safe registered engineer.

The most common reason for boiler leaks is a broken or damaged internal component like a pressure valve or pump seal. If there is leak that comes from the pressure valve, there is a possibility of a very high boiler pressure. On the other hand, a leak from the pump seal indicates that it might have already worn out and requires replacement.

If your boiler leaks around the tank or pipes, this is a telltale sign of corrosion. If not, this might be due to poor installation. Make sure to call out a heating engineer to diagnose and solve the leak.