Hi

I too have the F22 Vaillant problems and have read with interest advice and tips on what the problem is.

So I have a silly question (sorry) if the poor flow is caused by a blocked or weak pump, dirt or air or a blockage in the system, how can it be fixed? Do I get a Vaillant engineer in to fix the boiler, or water pump? Or contact the Green Sheild cover we have? Or some other specialist?

Sorry I did say it was a dumb question. I have just inherited this boiler.

Any advice greatfully received.

Thanks
Kim

Kim, February 2008

I read all the answers re PCB, flushing pumps etc....but I have done all of these many times over. I think it's something more subtle. Any views why it works fine when the temp outside is below freezing, then as soon as it creaps to say +5 it continously fails. It's so predicatable, this occurs every year

Steve, February 2009

i have the same problem f 22 and f 62.
The pressure bar is on 1.5 . how do i flush the boiler?

Any body know a good engineer in Liverpool?

luca, February 2009

flush the boiler with a good chemical from plumbers merchant b4 u swap pump as it may be sludge in system causing pump 2 run slow

paul, February 2008