What Pressure Should a Combi Boiler Be?

Check your combi boiler pressure!

One of the easiest things you can do to keep your boiler working correctly is check the pressure. There is a usually a clock like gauge on the front of the boiler or sometimes underneath.

Checking the pressure regularly will help indicate if there’s a leak on your system. And rather than finding out once you’ve run a freezing bath, then running round butt naked screaming the boilers broke again. You have just saved yourself a mini crisis. And it literally takes 10 minutes.

What Pressure is best for a combi boiler?

Ideally 1 Bar is the best pressure for your boiler. But it will fluctuate when its hot and cold. Don’t worry if your boiler pressure is increasing when the boiler is running. This is perfectly normal.

Let’s get technical: When the pump kicks in, the pressure will usually jump up by 0.5 bar so from 1 to 1.5 bar. Also when the boiler heats up the water expands and this increases the pressure slightly. Even with these increases f at cold the boiler pressure is 1 it shouldn’t rise above 2 bar.

If it keeps rising, from 1-1.5-2-2.5 right round to 3 you’ve got a problem. Then you need a local Gas Safe Registered Engineer to fix the issue.

What should i do if my boiler pressure is on 0 bar?

Don’t panic, there are many reasons this can happen, such as if you’ve bled a radiator, or if you’ve had some work carried out on your central heating system.

First if you haven’t bled a radiator have a look around at the radiators, radiator valves and any exposed pipes. Check for green, orange or brown stains, this could indicate a leak. Also, check for damp patches on the carpet, and floor as well as the ceiling.

If you can’t find any signs of a water leak just top the pressure up to 1 bar and keep an eye on it. If it continues to drop you you will likely need an expert to assist.

If you’re having boiler pressurfe issues GGB Heating Solutions can Help

We have over 25 years experience and have been in business for over 20 years, so you know we are a company you can rely on.

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