Viessmann Boilers Guide

Hi Everyone,

I have a Viessmann Vitodens 100W boiler installed last year. The boiler is continuously losing its pressure, especially at night. I have top up its pressure to 1.5 bar in the morning & heating runs well without losing pressure until the heating goes off late in evening. After 1-hour pressure of the boiler dropped below 1 bar & in two hours it is 0 bar. There are no signs of leaks. How can I fix it?

Thanking you in Anticipation

Susan

Hi Susan,

As you said that there are no signs of leaks then, the main problem can be within the boiler itself. Do check the pressure release valve because if this valve is leaking or even if there are few strains around your boiler then, this can be the problem. However, you cannot resolve this issue without the assistance of the specialist.