How can I top up the water level in my Vaillant Combi Boiler?
I have a Vaillant Combi Boiler of about 2 or 3 years of age, I have lost the manual and cant seem to download it from Vaillant website. I want to top up the water level as it is below 0.8 bar but am not sure how to top it up.
You need the fill loop fitted. If it is fitted just open the valve till the desired pressure is reached . If it is not fitted you need to call an engineer.
Robo
September 2008
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