Have got an ongoing problem with central heating system using a Vaillant Eco Max boiler.
The central heating pressure goes from 1.5 bar to zero in around 24 hours but there is no sign of a leak anywhere on the central heating system and the hot water system works very well.
Have tried using Fernox leak sealer but to no avail.
Any suggestions?
The central heating pressure goes from 1.5 bar to zero in around 24 hours but there is no sign of a leak anywhere on the central heating system and the hot water system works very well.
Have tried using Fernox leak sealer but to no avail.
Any suggestions?