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Vaillant timeswitch 150 analogue unit (clock stopped?

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My pressure keeps falling on my Vailant boiler, how do i top it up??????

My pressure keeps falling on my Vaillant boiler, how do i top it up????

Monique
September 2008
VaillantHeating, Home Heating SystemsBoiler Top Up
If you have a storage cylinder connected it may be low pressure in the expansion vessel. This should be checked annually and the manual will tell you what pressure is needed. Mine should be 4 bar but was down so I pumped it up again using a car-tyre pump.

Dennis Skinner
February 2009
You need the fill loop installed or opened, if its not installed you will have to call a heating engineer.

JB
September 2008

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