Why Does My Boiler Keep Losing Pressure in Selsey?
A boiler that keeps losing pressure is a common problem in Selsey homes. Here are the most likely causes and what you should do.
What Causes Boiler Pressure Loss?
If your boiler pressure keeps dropping below 1 bar, there is a leak or fault somewhere in your heating system. This is a common issue we see in homes across Selsey and the Manhood Peninsula, and it should not be ignored.
The most common cause is a small leak in the pipework or a radiator valve. Even a tiny leak that drips onto a floorboard can cause your boiler pressure to drop over time. Other causes include a faulty expansion vessel, a damaged pressure relief valve, or a leak inside the boiler heat exchanger.
How to Check for Leaks
Walk around your home and check all visible pipework, radiator valves, and the area around your boiler for any signs of water. Look for damp patches, rust marks, or green staining on copper pipes. If you find a leak, do not attempt to fix it yourself — call a Gas Safe registered engineer.
If you cannot find an external leak, the problem may be internal to the boiler, such as a faulty pressure relief valve or expansion vessel. These require a professional diagnosis.
Can I Repressurise My Boiler Myself?
Yes, you can repressurise your boiler using the filling loop to bring the pressure back to between 1 and 1.5 bar. However, if the pressure drops again within a few days, there is a leak that needs professional attention.
Continually repressurising your boiler without fixing the underlying issue can cause long-term damage to the system and may invalidate your manufacturer warranty.
Get Professional Help in Selsey
If your boiler keeps losing pressure, send us a photo of your boiler pressure gauge and a brief description on WhatsApp. We can diagnose the issue and arrange a repair visit across Selsey and the Manhood Peninsula.
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