Hi,
My boiler works fine on hot water but when the heating is on the pressure keeps rising and lifts the safety valve. Then when it cools down it needs to be topped up or it trips out on low pressure.
Any ideas as to why it is over pressurising?
Thanks DTR
My boiler works fine on hot water but when the heating is on the pressure keeps rising and lifts the safety valve. Then when it cools down it needs to be topped up or it trips out on low pressure.
Any ideas as to why it is over pressurising?
Thanks DTR