Search results

I have a 4 year old Vaillant EcoTec 428 system boiler which has been showing an F23 error code which is apparently down to a high differential between flow and return temperatures. It is a large 4 bed house with 16 rads. I had a plumber in who changed the pump on the system, but he said that...

Has anyone ever seen one of these? Just moved into a new house and several radiators have these on teh outlet end (they have TRVs on the inlet side. One of the radiators is cold at the bottom and I wanted to remove it and take it into the garden to try to flush it through and get any sludge...