Hi group, we have a Vokera Syntesi 35 boiler, just had an fault with the expansion vessel which has been resolved by fitting an external one in the loft, ran for a week but now I am getting an error code 07 which denotes a faulty thermistor. I would like to replace the secondary thermistor, is there an easy way to drain down the boiler without having to drain the entire heating system?
Thanks group, Otto in a very damp West Cumbria
Thanks group, Otto in a very damp West Cumbria
Last edited: