The Most Common Boiler Problems – All You Need to know!


No one wants their boiler to stop working as the entire heating system, and hot water system depends on it. But issues can arise from time to time. Thankfully, the majority of these faults and issues can be repaired and fixed by professionals.

Sometimes you might even fix the problem yourself. You should ensure regular maintenance of the boiler so that problems can be prevented. However, some issues may arise despite your many efforts and care.

1.  Leaking boiler

Water or gas leaking from a boiler is an alarming sign.

Water leaks

Water leakage can be seen in multiple forms. If the walls around your boiler or the floor underneath it have become filled with water, you will see staining, dampness, and a buildup of mold near the boiler.

If your boiler is losing pressure despite your many efforts to correct it, it might be due to water leakage. There are many reasons why your boiler might be leaking water, including:

  •         The boiler pressure is too high.
  •         Storage tanks are corroded.
  •         Pipes are corroded
  •         Joints in the heating system are sealed
  •         The boiler has become old and isn’t as efficient
  •         Poor maintenance of the boiler

If you think water leakage is the problem, contact a skilled and experienced boiler engineer to fix the problem for you.


If you feel like gas is leaking from the boiler, immediately open all your windows and doors, turn off the gas from the main supply and leave the house immediately.

Do not light a match or anything flammable. You can suspect it to be a gas leak if you smell a pungent smell like that of rotten eggs.

A gas leak is usually due to poor installation and fitting. Or if the boiler has become worn out due to daily wear and tear that was not repaired due to lack of maintenance.

In order to prevent gas leaks, you should get your boiler installed and serviced by a skilled boiler engineer immediately because gas leaking can increase your monthly Utility Bidder energy bills.

2.  Pressure is low

There are many consequences of low pressure, such as:

  •         No heating
  •         No hot water
  •         Radiators aren’t heating up properly
  •         The pressure gauge needle drops down

Low pressure of the boiler is usually due to a water leak. By releasing air from the radiator, you can lower the pressure of the system.

3.    High pressure

If the pressure gauge needle is above the 1.5 mark when the heating is turned off and 2 when heating is on, the boiler is pressurized. Take a look at your boiler manual to find out the exact level on which you should be alarmed, and it differs from model to model. There are many reasons why the pressure may be too high:

  •         Too much water in the system
  •         Repressurizing flaws
  •         Broken or faulty parts
  •         Old boiler
  •         Lack of maintenance

4.  No hot water

If you open the tap and there is no hot water, it can be very frustrating, especially during the winter season. If there is no hot water, it may be due to:

  •         Frozen condensation pipe
  •         Lack of fuel
  •         Faulty thermostat
  •         Pilot light is gone out

So finally, I hope you were able to understand the most common problems in a better way with this article. Thanks for reading.


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