Why is my boiler pressure so low?
Table of Contents
Why is my boiler pressure so low?
Check the pressure gauge on the front of the boiler to see if it has low pressure. Causes of low pressure include leaks and recently bled radiators. You can increase the pressure by putting more water into the system via a filling loop. Call a Gas-Safe engineer if the problem isn’t resolved.
Is it safe to use a boiler with low pressure?
Is low boiler pressure dangerous? No – the good news is low boiler pressure isn’t dangerous. Sometimes, heating systems have small leaks – a bit like a slow puncture in a tyre. While you might not notice any water escaping, over time the pressure in the system falls until it’s too low.
Can you Repressurise a boiler when it’s on?
It is not necessary to turn the boiler off to repressurise the system. You won’t have to switch off the power to it either. You will need to turn off the central heating, which can be done from the room thermostat, and let the system cool before filling it with more water.
Can boiler pressure drop without a leak?
Can a boiler lose pressure without a leak? If you have found no leaks and your boiler is still losing pressure, the cause may instead be a boiler leak, a hidden leak on the system.
Will bleeding radiators increase boiler pressure?
Yes. During the process of bleeding radiators, air is released from within them, which in turn reduces the pressure in your boiler system.
How often should you top up your boiler pressure?
The pressure in the system will usually require topping up once or twice a year. If you are having to repressurise your heating system much more frequently, please contact your installer.
How often should I top up boiler pressure?
Ideally, you shouldn’t need to top up your boiler pressure very often. But if the pressure drops more than once or twice a year, check all visible pipes for signs of water leaks. You might also find green deposits near joins in copper pipework, or stains on the skirting boards or ceilings.
Can you top up boiler pressure when its on?
To top up a boiler with fresh water and increase pressure, you should not top it up when it is on. This is because it won’t give you an accurate system pressure reading and you could end up not putting enough water in, or too much.
