What's the most likely cause for a newish thermostatic valve to physically break (other than accidental physical damage)?
We have a 2 year old Keston boiler (sealed system), the system was flushed, sealant used prior to installing the boiler + many new radiators and balanced afterwards (but not successfully).
We have a 2 year old Keston boiler (sealed system), the system was flushed, sealant used prior to installing the boiler + many new radiators and balanced afterwards (but not successfully).