June 11, 2021

How to add pressure to your Vaillant Ecofit combi boiler

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Are you experiencing low water pressure on your Vaillant EcoFit combi boiler?

Pressure loss can be caused by a number of reasons. Something to bear in mind is that the pressure gauge on your boiler is a reflection of the pressure in your heating system – this includes your boiler, radiators and all pipe work that connects these vital components. This means if your pressure gauge is low it could be a leak somewhere between your boiler and radiators.

On many occasions no leak is visible and it’s completely normal to re pressurise your heating on an annual basis. However, if you find you’re pressuring the heating on a regular basis and no leaks are visible anywhere in the property then it would be a good idea to get your boiler serviced and please ensure the heating engineer checks the expansion vessel.

A deflated expansion vessel can cause the pressure in your heating system to increase and release water outside via the pressure relief valve once it hits 3 bars. Then when your heating cools the boiler will then read low pressure. Once the expansion vessel is recharged and sometimes replaced the water will have room to expand and the boiler will stop releasing the water when the heating is operating.

The video below shows you how to refill a Vaillant Ecofit Pure combi boiler.

Hope you find it useful!

If you’re based in SW London / Twickenham area and require help with your boiler or heating system, give us a call

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