System is:vcw-sine 18 t3 w (gc- no. 47 044 01)
While running the hot water tap the radiators get hot without the heating being on.
I have looked through the forum but still confused as to what part fault could cause this.
I have an instruction book and thinking if this is a diy job (i know its an old boiler,but seemed to be reliable).
Any advice and tips to repair fault would be much appreciated.
Thanks in advance
While running the hot water tap the radiators get hot without the heating being on.
I have looked through the forum but still confused as to what part fault could cause this.
I have an instruction book and thinking if this is a diy job (i know its an old boiler,but seemed to be reliable).
Any advice and tips to repair fault would be much appreciated.
Thanks in advance