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20 Μαΐ 2022 · Boiler pressure going really high is a common issue with Vaillant boilers. It’s mainly caused by the expansion vessel losing its factory 1 bar charge over time. This results in dramatic pressure rises when the heating is on as the vessel can’t properly absorb expanded water volume.
The boiler pressure will rise when it heats water in the system and drop slightly as it cools. If your boiler pressure is too high, let your system cool and recheck the pressure. If the problem persists, contact a Gas Safe engineer to diagnose the problem.
A boiler’s pressure can drop due to two main reasons: A leak in the system will result in not enough water being present in the system, consequently causing the pressure to drop. A bleeding radiator can also reduce system pressure. Low boiler pressure can be fixed by repressurising the boiler.
25 Αυγ 2022 · Part of our U Can Fix series, our apprentice demonstrates how to re-pressure a Vaillant boiler following an error code indicating low pressure....more.
In this article we will analyze the reasons why the Vaillant boiler rises pressure on its own, as well as effective solutions to fix the issue.
6 Σεπ 2024 · Key takeaways. Overfilling: Adding too much water can increase boiler pressure beyond safe levels. Faulty Pressure Relief Valve: A malfunctioning valve can cause excessive pressure build-up. Thermal Expansion: Heat expansion in the system can lead to increased pressure if not regulated properly.
If it’s too high – your boiler will tell you, but not over WhatsApp – via your boiler pressure gauge. ...or it just breaks down. In this guide, we'll explain the major causes of boiler pressure being too high and how to reduce your boiler pressure.
