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Tips to Fix Low and High Boiler Pressure

If your boiler has stopped working properly or cut out completely, this could be due to a variety of reasons. The cause may be the boiler’s water pressure. A quick look at the pressure gauge on the front of the boiler will tell you whether it’s low or high boiler pressure. Basically, in order for your boiler to pump hot water around the pipes in your house, the system pressure needs to be balanced correctly. In this article, we’ll look at how you can fix this from home and our tips to fix low and high boiler pressure.

What is the Right Boiler Pressure?

As an essential part of your home, it’s important to keep your boiler in good shape with regular maintenance. This will help to prevent any minor problems from getting worse which in turn could lead to expensive emergencies. Boiler pressure refers to the pressure of hot water running in your sealed central heating system. Comparatively, water pressure is the pressure of the water coming through your taps.

On the front of your boiler is the pressure gauge. This will be in one of two forms. An analogue display includes a pointer and looks like a clock face or speedometer. The needle points to the pressure.

Alternatively, your boiler will have a digital display and may show other information such as timers and temperatures.

The ideal pressure should be between 1 and 1.3 bar or be in the green zone. However, it’s a good idea to check your boiler manual for the optimum range.

What to do if Your Pressure is Too Low?

Low boiler pressure is nothing too much to worry about in terms of safety. It’s not likely to cause any damage to your boiler. However, it can have a large effect on the efficiency of your heating system. Essentially, if your boiler is losing pressure, it means that it will be harder to heat your home. This in turn will lead to higher gas bills.

Topping up the boiler pressure is a simple fix and can be carried out at home without a heating engineer. At some point during the boiler’s life cycle, you’ll have to top it up with mains cold water.

There are a few steps you can take to repressurise your boiler.

Firstly, identify what sort of filling system you have and then follow the instructions. You may have either an external filling loop or an internal filling loop. Whichever loop you have, follow the instructions and then watch the pressure rise. Stop once the bar reaches just about one.

If you have a keyless filling, there will be a blue lever at the bottom of your boiler. To increase the pressure, simply pull down the blue lever. Once the pressure has increased to over one bar, release the lever. Nonetheless, if your boiler continues to lose pressure on a regular basis, it might be time to consider a replacement. Especially if your boiler is over 10 years old.

What to do if Your Pressure is Too High?

If you check your pressure gauge and the boiler reading is over 1.5, it’s too high. 2 bar starts to become more serious. If it reads at the 3-4 bar, it’s in the red zone and this means your boiler has probably shut itself down as an internal safety precaution.

This is the time to get in touch with a Gas Safe boiler engineer.

There are a few scenarios that lead to high pressure.

Firstly, the heating system has been overfilled with water.

Secondly, the pressure release devices in the boiler are failing.

Thirdly, it could be down to natural expansion from boiler parts.

In the first scenario, you can try draining water from the heating system. This is via the drain cock or by bleeding the radiators. Make sure you shut off the valve at 1.3 bar to avoid reducing the pressure too much and causing low pressure.

In the second and third scenarios, it could be that some parts are not operating as they should. Different boilers have different parts to help release pressure when it’s at its highest. This includes expansion vessels, auto air-vents, and pressure release valves. Instead of releasing pressure, they are containing it. Therefore the boiler’s excess pressure has nowhere to escape. You will need an engineer to assess your boiler.

With high pressure, it’s important to call an expert to help with repairs. FixLink is a well-established business and our engineers are highly skilled and Gas safe registered. We can help to fix your boiler and advise you on any boiler problems. We can also offer new installations.

Generally speaking, if your boiler water pressure is giving high pressure readings on a regular basis, you may want to consider a replacement.

Call FixLink if Your Pressure is too Low or High

It’s worth emphasising that if you see that your boiler pressure is too high and you smell gas, call FixLink as soon as possible. A boiler that is defective can be dangerous to you and your family.

With this in mind, do not make any repairs to your boiler by yourself. If you have checked the boiler pressure and you need to increase it, follow the instructions in your manual. If you have tried making adjustments and it still isn’t increasing in pressure, then by all means, call us at FixLink.

However, if you have checked the pressure and it is too high, this can be difficult to adjust at home, so contact us at FixLink.

To Conclude: Tips to Fix Low and High Boiler Pressure

In conclusion, if you have a boiler breakdown or a problem with your heating, we can help you to get your hot water and heating back on at Fixlink. You don’t need to be a FixLink customer to use our boiler and heating breakdown services.

Having an annual boiler check will help to maintain the efficiency and longevity of your boiler. It’s worth emphasising here that if your boiler is over 10 years old and you continue to have low or high pressure readings on a regular basis, it probably needs replacing.

Contact us immediately and we’ll be more than happy to help you with your emergency heating, electrical, or plumbing requirements. Or with a new boiler installation.