Asked by: Kiowa Brumos
asked in category: General Last Updated: 8th April, 2020

Why does my boiler keep losing water?

A boiler that keeps losing pressure is therefore always cause for concern. There are two main problems that typically cause a loss of pressure - water escaping somewhere in the system or a failure of the expansion valve and resulting damage to the pressure relief valve.

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Accordingly, why does my boiler keep losing water pressure?

Your combi boiler can be losing pressure for a number of reasons. Pressure loss may be caused from a leak in the pressure relief valve, an issue in the expansion vessel, air in your system, or a leak in the heating pipework itself.

Also, is low boiler pressure dangerous? The good news is that low boiler pressure is nothing to panic about and is not likely to cause any damage to your boiler. On the other hand, it can have a real effect on the efficiency and effectiveness of your heating system, making it hard to keep your house warm and costing you more on your energy bills.

Besides, why does my boiler keep going off?

Lack of water flow If the boiler keeps shutting off, it could be due to closed valves, air caught in the system or a broken pump. If there is enough air in the system to cause your boiler to switch itself off, it should be obvious when you start bleeding your radiators, as plenty of air will gush out of them.

How often should a combi boiler lose pressure?

If the pressure has fallen to below 0.5 bar (often indicated by a red section), then it shows that some water has been lost out of the system and it must be replaced. The pressure in a central heating system will usually need to be topped up only once or twice a year.

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