Vaillant Combi Boiler

Vaillant combi boiler models, guide, comparison, parts, manual, drawings, help

Ecotec Plus Combo Boiler


When I put the boiler on, the gauge is going in the red, is this bad should i worry about it or can I do anything to put it right. Please can you help. Thank you.


Hi Ian,

This can be serious problem especially if your system relief valve is defective.  High pressure is typically caused because there is either too much water in the boiler circuit or trapped air.  You can drain water off at the dump valve located near the boiler.  Alternatively you can drain water off at the vent located on one of your radiators.  The highest radiator is best because you will be able to see if trapped air in the system is causing the issue.

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