Homeowners look no further if you want a qualified heating engineer to work in your home. K Williams Gas Services are tidy and neat, providing a quality heating service unmatched in the Bentilee area.
"I've got the Vaillant ecoTEC pro28, last week was serviced, now I have F75 error and the diverter valve is leaking.
How much for work and how much for a new diverter valve ?"