Vaillant Turbomax Plus 824E Hot Water Pressue Issue

[BDH555]

Hello,

I’ve got an issue with the boiler in a house I have just purchased. I’ve looked online but don’t seem to be able to find a similar issue.

Basically when running hot water at a lower rate, the boiler will kick in and proved DHW, but will begin to decrease the flow rate, until it is too low to heat and turns off. All else appears to be working fine, and I have checked the CH in case of the common diverter valve issue, but the rads stay cold.

Has anyone experienced this issue before, or know of any problems that may be causing it?

Thanks for the help!

 

[cross thread]

is it all taps ? it its only one then it sounds like tap washer needs replacing

 

[CWHEATING]

Sounds like it’s down to the actual tap.

 

[BDH555]

Thanks for the replies, it happens to all taps, but then in saying that they are all the same make and model, and none have been changed in 18 years as far as we’re aware.