Viessmann Vitodens 050 No Heating

[Dan Robinson]

Phew.... I'm busy enough without having to deal with those German schitboxes

 

[Phill Peck]

hey ajayre what area you live because if phil is near by (Cambridgeshire) he might be able to help

He’s not one of my customers though so afraid not.

 

[Phill Peck]

Phew.... I'm busy enough without having to deal with those German schitboxes

Oi
I’ll have you know the 050 is made in turkey(I think)

 

[Groover75]

East Yorkshire. Will try the manual method and hopefully that manages the problem until it can be fixed.

 

[Groover75]

Sigh.... Viessmann came out and said nothing is wrong with the boiler. The boiler installer says it is nothing to do with them because there is a water leak somewhere in the house.

The boiler will only turn the heating on if the DHW is turned off, and vice versa.

After I charged the system back up to 1.5 bar the pressure held for a day or two and then slowly dropped towards 1 bar over a period of a few days.

Installer suggests a leaking mixer tap is to blame. There are no dripping taps and no signs of a water leak, so no idea where it could be. So stuck without heating working properly.

 

[Dan Robinson]

Installer suggests a leaking mixer tap is to blame.

Oh dear.

 

[dilalio]

Installer suggests a leaking mixer tap is to blame

You cannot lose system pressure out of a leaking mixer tap - unless your installer eats dogs!

 

[Groover75]

So to confirm, by closing the DHW outlet valve at the boiler the rads heat up. Open the valve again and the rads cool down. Water pressure has stabilized and held. Any ideas? The installer is reluctantly coming out tomorrow but they are adamant it is not their problem so I need as much info/ammunition as I can. Thanks!

 

[Groover75]

Some idiot in the past extended the hot water to a new utility room. They ran the pipe inside the bathroom waste pipe... this broke pouring water down the drain so the large leak was not visible anywhere. Now fixed.

 

[Dan Robinson]

Wowsers.

 

[tolly123]

Any pictures?

 

[dilalio]

Some idiot in the past extended the hot water to a new utility room. They ran the pipe inside the bathroom waste pipe... this broke pouring water down the drain so the large leak was not visible anywhere. Now fixed.

I wouldn’t use the term “idiot” for someone who did that!

 

[chrisw99]

Some idiot in the past extended the hot water to a new utility room. They ran the pipe inside the bathroom waste pipe... this broke pouring water down the drain so the large leak was not visible anywhere. Now fixed.

Still don't understand how a leak in the hot water system causes a pressure drop in the heating system?