If you’ve noticed that your boiler pressure keeps dropping, you’re not alone. This is a common issue many homeowners face, and it can be frustrating when you’re unsure why it’s happening or how to fix it. Understanding the causes behind dropping boiler pressure is essential to preventing further damage and keeping your heating system running efficiently. In this blog post, we’ll explore some of the most common reasons why your boiler pressure might keep dropping and what steps you can take to resolve it.
1. A Leak in the System
One of the most common reasons for dropping boiler pressure is a leak in the heating system. Even a small leak can cause a gradual loss of pressure, as water slowly escapes from the system. Leaks can occur in various parts of the system, such as the radiators, pipes, or even the boiler itself.
If you have a leak, you may notice damp patches on walls or floors, or you might hear a hissing sound near your pipes. To fix this issue, it’s important to have a heating engineer inspect your system for any leaks. If left untreated, leaks can cause further damage to your system and lead to more costly repairs.
2. A Faulty Pressure Relief Valve
The pressure relief valve is a safety feature on your boiler that helps regulate the internal pressure. If the pressure gets too high, the valve opens to release water and reduce the pressure. However, if the valve becomes faulty or damaged, it can cause water to leak out of the system, leading to a loss of pressure.
You can check for a faulty pressure relief valve by looking for water around the boiler or signs of water pooling near the base of the unit. If you suspect the valve is malfunctioning, it’s crucial to contact a professional to repair or replace it.
3. Air in the System
Air trapped in the heating system can cause fluctuations in pressure. When air gets trapped in the radiators or pipes, it can prevent water from circulating properly, which may result in a drop in pressure. If you’ve noticed cold spots on your radiators or hear gurgling sounds coming from the pipes, there’s a good chance air is trapped in your system.
To resolve this issue, you can bleed your radiators. This is a simple process that allows the trapped air to escape and helps restore the pressure in your system. If you’re unsure how to do this, a heating engineer can carry out the task for you to ensure it’s done safely and correctly.
4. A Faulty Expansion Vessel
The expansion vessel is another crucial component of your boiler. It helps to absorb the increased pressure caused by the expansion of water when it’s heated. If the expansion vessel is faulty or the air charge inside it has worn out, the system can become pressurised, causing the pressure to drop.
A faulty expansion vessel can often be identified by unusual sounds coming from the boiler or pressure fluctuations. To check and replace an expansion vessel, you’ll need a professional heating engineer to diagnose and repair the issue.
5. A Broken Pump
Your boiler’s circulating pump is responsible for moving water through the system. If the pump becomes faulty or damaged, it can cause a drop in pressure. A broken pump can also lead to other issues, such as your radiators not heating up properly or the system becoming sluggish.
If you suspect a problem with the pump, it’s important to call in a heating engineer to inspect and repair or replace the pump as needed. Ignoring this problem can lead to further damage to your boiler and heating system.
6. Incorrect Boiler Pressure Settings
In some cases, the issue may not be related to a fault but rather an incorrect pressure setting. Boilers generally require a pressure between 1 and 1.5 bar when cold, and the pressure can rise slightly when the system is heated. If your pressure gauge reads too low, it could be because you’ve accidentally set the pressure too low.
You can easily check and adjust the boiler pressure yourself by following the instructions in the user manual. If you’re unsure, a heating engineer can help set the correct pressure for your boiler.
What to Do If Your Boiler Pressure Keeps Dropping?
If you’ve noticed a consistent drop in boiler pressure, it’s essential to address the issue promptly to avoid potential damage or a breakdown of your heating system. Here are the steps you should take:
- Check for visible leaks – Look around your boiler and heating system for any signs of leaks.
- Bleed your radiators – If air is trapped in your system, bleeding the radiators can help restore pressure.
- Check the pressure relief valve – If there’s water around your boiler, it could be a sign of a faulty valve.
- Call a professional – If you’re unable to fix the problem yourself or suspect a more serious issue, it’s time to call in a heating engineer.
At A N Heating Ltd, we provide expert boiler repair across Wiltshire. Our experienced team can diagnose and fix the root cause of your boiler pressure issues, ensuring your heating system is safe, reliable, and efficient.
Contact Us for Professional Boiler Repair in Frome
If your boiler pressure keeps dropping and you’re unsure of the cause, it’s time to get in touch with a professional. At A N Heating Ltd, we offer expert boiler repair in Frome, and we can quickly identify and fix any issues with your heating system. Our friendly, experienced engineers are here to provide efficient and reliable service to ensure your home stays warm and comfortable.
Call us today on 01225 708 562 or visit our contact page to book an appointment. Let us help you get your heating system back on track!
