Hiya, great video. Got the same boiler so really helpful to see as vessel needed recharging. The water drained from the boiler had black bits and smelt burnt almost, is this normal?
Different vessels need pumping to different pressures. 1.5 seems high but you would need to check the Vaillant manual. It is usually 0.75 to 1.0 however for most vessels
mine keeps coming up with an F22 error and 0.0 on display So i topped it up a bit just to 0.9 and the boiler started up. I thought great ive sorted it, but then when it was running the pressure keeps raising and raising luckily i spotted it at 4.3 so quickly shut it off. Went back to look in the cupboard and low and behold F22 code was back and 0.0 on the display. So i did the same again but this time watched it and it literally creeps up on the pressure gauge very quickly as im stood there so ive turned it off 🤷🏻♀️ typical friday night and blooming freezing weather 😖
It sounds like the expansion vessel needs re pressurising (pumping up). If this is flat, then the pressure will always go when the heating is on. This is because the water in your system expands when it gets hotter and therefore pressure goes up...
@@northwestgascertificates thank you so much for replying to this. I can't tell you how much more confident I feel calling somebody to come help now I have an idea what's potentially going on. If you were local id most definitely have asked you to come fix it for us. Thank you. These videos are super helpful for people like myself who have no idea about these things.
@@northwestgascertificates I will definitely sound like I know what I am on about thanks to you. When you're a female on your own you some times worry about sounding daft and like you don't know anything. Cheers for your help. It's helped me more ways than I can say!! Have a great weekend 🙂
I did this before watching, I only isolated the one valve I drained but didn't isolate the other, as I thought it is not needed to be if not draining. Is isolating both always required, even if not draining the other? If so have i caused potential damage?
If you don't isolate both valves, you are not isolating the boiler from the rest of the central heating system (radiators, pipework), therefore you will start draining the whole system and not just the boiler. Its not a problem if you drain the whole system but not necessary..
Thank you very much for your response, I appreciate it all lot. One more question if you don’t mind me asking. Why do you drain the right valve specifically? Wouldn’t you drain both left and right valves in the case of the bar being too high?
Sorry for the slow reply. It doesn't matter which side you drain as long the pressure goes down to zero and you just need to keep one side open (again it doesn't mater which side/you can open both if you like) while you pump the vessel up...
Worth mentioning about leaving on boiler during dropping the pressure and make sure it shows f22, or the pressure sensor would need changing. Good video bud, but please stop chewing gum in my ears
