Why Is My Boiler Pressure Too High? How to Fix it

January 11, 2022 4:12 pm
Published by: reapirnetwork

Boiler pressure can change for a variety of causes. If you discover that the pressure in your boiler has become too high, in the following troubleshooting steps we will discuss how to lower it and restore it to its normal operating level.

What Is Boiler Pressure And What to Know About It?

The water pressure within the boiler is referred to as “boiler pressure.” The pressure of the boiler is determined by the balance of water and air within the machine, and it must be kept at a normal level to guarantee that the boiler is gas safe, which is critical for your safety.
The pressure generated by the boiler is distributed throughout the system’s pipes and components, and it can be hazardous when enough pressure builds up.
It’s a good choice to consult a boiler engineer if you need to lower your boiler pressure or to restore it to normal.

Contact Boiler Engineer near you

How to Read Your Boiler Pressure

The perfect boiler must be able to detect when pressure needs to be adjusted. But that isn’t the case, then contact a boiler engineer to make an inspection.
You must monitor the boiler pressure gauge to verify if your boiler is operating properly. Because of the colours and numerals on the gauge, it is easy to observe whenever the boiler pressure approaches a dangerous zone on most boilers.
The pressure in your boiler ought to be between 1 and 1.5 bar, which would be in the green portion of the pressure indicator. If the pressure from the water in the system exceeds 2.5 bars, the pressure is too high, and anything below 1 bar is too low.
To keep it safe, your heating system should immediately shut off if the boiler pressure is extremely high or low. At a high pressure of three or four bars, a new boiler like the Worcester BOSCH 8000 model will automatically shut off.
Strong pressure in your boiler isn’t always a concern; it could simply signal elevated water requirements from the system. If this is the case, the release valve will go down once you have interrupted access to water in the house, such as cleaning dishes or taking a bath.
However, there could be a problem with your boiler if the pressure has become too high at approximately 3 bar without any additional demand for hot water.

Common Causes of High Boiler Pressure

There is most certainly a problem with your boiler if the pressure is constantly too high.
Let’s look at a few of the most prevalent reasons for high boiler pressure:

Standard Issues

The more water or air pressure in your boiler can be caused by a number of factors, including the expansion vessel, pressure release valve, and filling loop.
You can inspect these valves yourself, but most boilers require a gas safe professional to check that your home has better accessibility to heating and hot water. In most circumstances, boilers with this type of malfunctioning valve can be readily repaired, and it is often not expensive.
To get the proper solution and keep your place safe, call a boiler technician as quickly as possible if there are difficulties with your boiler.

Boiler Needs a Replacement

Most boilers can last around 10 years and occasionally even longer, if maintained well.
However there isn’t any strict rule, on some occasions a boiler might have to be replaced  sooner than expected. So, how can you know when it’s time to replace your boiler?
Here are some of the common reasons that your boiler needs to be replaced.

  • If your current boiler is more than ten years old with frequent issues, then you should consider replacing it.
  • Are you constantly in need of an engineer to get your boiler up and running? If your boiler requires many call outs in a year, then it will be a good choice getting your boiler replaced.
  • Have you detected any new sounds coming from the boiler radiators frequently?

Any unusual sounds, mainly those accompanied by vibrations, could indicate an underlying problem.
If your boiler isn’t keeping up with your heating and hot water demands, it’s time to upgrade to a more powerful one.

How to Reduce Boiler Pressure

If the problems with your boiler aren’t more complicated, then you might be able to fix them yourself to reduce the boiler pressure.
Boiler pressure can be caused by a variety of factors. One of the issues you might be able to solve on your own is having excessive water in your boiler. To lower boiler pressure caused by excessive water, make sure this is the issue first. You could do that by turning off the boiler and checking the pressure gauge.
When the pressure is greater than 1.5 bars, it is considered excessive. It’s simple to repair this problem by releasing pressure from a boiler. Most of the time, all you need to do is bleed your radiators with a radiator key to relieve some of the pressure.
Every radiator has a pressure release valve that is easily accessible. This can be turned to help reduce the pressure from the boiler. Only open the radiator valve slightly and allow them to bleed until the extra water in your boiler has been removed, in which you can monitor using the pressure gauge.

Still Boiler Pressure Too High? 

Contact Boiler Engineer near you

If there continues to be too much pressure in boiler, there might be one of the following problems:

  • The boiler expansion vessel must be depressurised.
  • The filling loop has a flaw.

It’s recommended to contact a skilled boiler engineer for their assistance while you are experiencing trouble with your boiler. This will make things a lot easier for you and allow you to solve the problem faster than trying to do it by yourself.
Repair Network’s trained boiler engineers would investigate your issue and assist you in resolving it at your leisure. To schedule an appointment, please contact us

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Categorised in: Boiler