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Vaillant 828/2E How to increase pressure dial reading?

Our system slowly loses pressure approx every 3 months until it shuts down with an error message. Keep getting plumber out and he fixes it but it gets expensive, is it something that I can do myself, I`ve looked in the manual but can`t find any instructions. It`s just above zero now and will shut down soon.

J. Outen
October 2009

Vaillant Heating, Home Heating Systems Pressure System Approx

look under the boiler to the right and near the front, you should see a slot for a screwdriver, turn it clock wise you will hear water run in to the boiler once the dial reads 1.5 turn off and boiler should work.

erj
October 2009

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Vaillant 828/2E How to increase pressure dial reading?

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