If your boiler keeps losing pressure, you’re not alone. This is a common issue faced by many homeowners, especially during colder months when heating systems are in regular use. A drop in boiler pressure can lead to reduced performance or even a complete loss of heating and hot water due to the boiler cutting out.
While it might seem like a small problem, it often points to a fault that needs attention. Instead of trying to fix it yourself, it’s always best to have the system checked by a qualified engineer. At Kerry Maintenance, we provide fast and professional boiler support to help you get back to comfort and peace of mind.
What is Boiler Pressure?
Boiler pressure is how you measure the amount of water inside the central heating system and radiators. It is the force that is exerted by the water and is measured in Bar. The pressure is how the water moves through the system and the radiators. It plays a key role in keeping your house warm and ensuring you have a reliable supply of hot water.
What Does Boiler Pressure Loss Mean?
When a boiler loses pressure this means there is less water in the system and it won’t be able to push the water round the radiators as well.
Most boilers operate best at a pressure between 1 and 1.5 bar. You can usually check this on the pressure gauge, which is often found on the front of the boiler. If the pressure drops too low, the system may shut down or display a fault code. You might also notice cold radiators or no hot water.
Pressure loss often indicates a bigger issue within the system—something that needs more than a quick top-up. Leaving it untreated can lead to further damage or higher energy bills. If your boiler pressure keeps dropping, it’s time to get it looked at properly.
Why Is My Boiler Pressure Dropping?
Understanding why boiler pressure is dropping helps you know when to act. Below are the most common reasons behind this problem—each of them should be assessed by a qualified engineer.
Leaks in the Heating System
Leaks are one of the most frequent causes of pressure loss. These can be small and hidden, such as around pipe joints or on radiators, or more noticeable like dripping from the boiler itself. Even a slow, steady leak can cause regular drops in pressure.
Pressure Relief Valve Issues
The pressure relief valve is a safety feature designed to release water if pressure becomes too high. If this valve is faulty or has debris inside, it may release water when it shouldn’t. This can cause gradual pressure loss and leave puddles or damp patches near the external overflow pipe.
Expansion Vessel Problems
Inside your boiler is a component called an expansion vessel. Its job is to absorb the pressure as water heats and expands. If it becomes damaged or loses air pressure, the system can overcompensate by releasing water through the relief valve, leading to a pressure drop.
Air in the System or After Bleeding Radiators
Trapped air can affect how your heating system works. It sometimes enters the system naturally or during maintenance. Following our step-by-step guide on how to bleed your radiators will help remove this air, but the process can also lower pressure—especially if the system isn’t topped up correctly afterwards.
Each of these issues requires proper inspection and repair. Attempting to diagnose or fix the problem without the right skills or qualifications can lead to further damage or even safety risks. Kerry Maintenance has the experience and tools needed to handle boiler pressure problems safely and correctly.
Why You Shouldn’t Try to Fix Boiler Pressure Yourself
It might be tempting to search online for a quick fix, especially if your heating cuts out, but boilers are complex and potentially dangerous systems. Only Gas Safe Registered engineers should carry out work on boilers.
Topping up the pressure incorrectly, or missing the real cause of the issue, can make the problem worse. It may even void your manufacturer’s warranty. That’s why it’s best to avoid DIY fixes.
Instead, call a qualified engineer who knows exactly what to look for. At Kerry Maintenance, we’re Gas Safe registered and fully trained to handle all types of pressure faults. We check every part of the system, fix the root cause, and make sure your boiler runs safely and efficiently again.
Expert Boiler Repair Near Me – Kerry Maintenance
If you’re searching online for boiler repair near me, you’ve found a trusted local solution. Kerry Maintenance offers expert boiler services across Gloucestershire, helping homeowners stay warm and safe all year round.
We know how disruptive boiler problems can be, which is why we offer quick response times and clear communication. Our team has years of experience diagnosing and fixing pressure issues, whether it’s a faulty valve, a hidden leak, or an internal component that’s failed.
All our engineers are fully certified and follow strict safety standards. We arrive on time, explain what we’re doing, and leave your home as tidy as we found it.
Get in touch today to book a visit or request an emergency call-out. We’re here when you need us.
