If you’ve noticed that the pressure on your boiler keeps dropping, you’re not alone. This is a common issue that many homeowners face, and it’s often the sign of an underlying problem. But why does my boiler pressure keep dropping? In this post, we’ll explore the most common causes of low boiler pressure, how to identify the problem, and what steps you can take to fix it.
What Is Boiler Pressure?
Boiler pressure refers to the pressure of the water inside your heating system. It’s important because it ensures that water is circulated properly through your radiators and pipes, delivering heat to your home. Most modern boilers operate with a pressure range between 1 and 2 bars when the system is cool. If the pressure drops below this range, your boiler may not work efficiently, or it could shut down altogether.
Common Causes of Dropping Boiler Pressure
If your boiler pressure keeps dropping, it’s likely due to one of the following reasons:
1. Leaks in the System
A leak in your heating system is one of the most common reasons for a drop in boiler pressure. Even a small leak can lead to a gradual loss of pressure over time. Leaks can occur in the pipes, radiators, or even inside the boiler itself. If you suspect a leak, check for visible signs of water around your radiators, pipes, and the boiler. In many cases, the leak may be too small to spot immediately, but it will still cause your system’s pressure to decrease.
If you cannot locate the source of the leak, it’s essential to contact a professional heating engineer. Harpers Heating & Plumbing provides expert boiler repairs in Sawbridgeworth and can quickly identify and fix leaks to restore your system’s pressure.
2. Faulty Pressure Relief Valve (PRV)
The pressure relief valve (PRV) is a safety feature that releases excess pressure from your boiler to prevent damage. However, if the PRV becomes faulty, it may allow too much water to escape, leading to a consistent drop in pressure. You may notice that the PRV is releasing water when it shouldn’t be, which is a sign it needs replacing.
A faulty PRV can be tricky to fix without professional help. If you suspect this is the cause of your boiler’s pressure problems, it’s best to consult a qualified engineer.
3. Bleeding Radiators
Sometimes, bleeding your radiators can cause the pressure in your boiler to drop. When you bleed a radiator, air is released from the system, which can reduce the overall pressure. After bleeding your radiators, it’s essential to check your boiler’s pressure and top it up if necessary.
While this is a simple fix, if your pressure continues to drop after bleeding the radiators, there may be a more serious issue at play.
4. Faulty Expansion Vessel
The expansion vessel in your boiler is designed to handle the increase in water pressure that occurs when the system heats up. If the expansion vessel becomes faulty or loses its charge, it can’t regulate the pressure effectively, leading to pressure drops. This is often accompanied by the PRV releasing water.
A faulty expansion vessel typically requires the expertise of a heating engineer to repair or replace. At Harpers Heating & Plumbing, we can diagnose and repair expansion vessel issues as part of our boiler repair services in Sawbridgeworth.
How to Fix Dropping Boiler Pressure
If your boiler’s pressure keeps dropping, it’s important to take action before it leads to further problems. Here are a few steps you can take to address the issue:
1. Repressurise Your Boiler
In some cases, low pressure can be resolved by simply topping up the system. Most modern boilers have a filling loop that allows you to add more water to the system and increase the pressure. Be sure to consult your boiler’s manual for specific instructions on how to do this safely.
However, if you find yourself having to repressurise your boiler frequently, it’s a sign that there’s an underlying issue that needs addressing.
2. Check for Leaks
If you suspect a leak is causing your pressure to drop, inspect your system for visible signs of water escaping. If you find a leak, it’s important to fix it as soon as possible to prevent further damage to your boiler and heating system.
3. Call a Heating Engineer
If you’ve checked for leaks, bled your radiators, and repressurised your boiler, but the pressure keeps dropping, it’s time to call in a professional. There could be an issue with the PRV, expansion vessel, or another component of your boiler that requires expert attention.
At Harpers Heating & Plumbing, we specialise in diagnosing and repairing boiler pressure issues. Our team of qualified engineers can provide comprehensive boiler repairs in Sawbridgeworth, ensuring that your heating system is back to full working order as quickly as possible.
Preventing Boiler Pressure Problems
While some causes of low boiler pressure are unavoidable, regular maintenance can help prevent issues from escalating. Scheduling an annual boiler service is a great way to ensure that your system is working efficiently and to catch any potential problems early.
During a service, your heating engineer will check all the components of your boiler, including the PRV and expansion vessel, to make sure everything is functioning properly. This can help prevent unexpected breakdowns and keep your boiler operating at optimal pressure.
Conclusion
Dealing with dropping boiler pressure can be frustrating, but with the right knowledge and professional help, you can keep your heating system running smoothly. Whether it’s due to a leak, a faulty valve, or another issue, addressing pressure problems early can prevent more serious damage to your boiler.
If you’re experiencing pressure issues or need expert advice, contact Harpers Heating & Plumbing. We offer reliable boiler repairs in Sawbridgeworth and can help you get your system back to full efficiency. Don’t let low boiler pressure disrupt your home – contact us today to book a repair or service.
