Thanks for the help guys ...... solved at last !
It was a blocked outlet from the expansion & feed tank !
Would not of found it without your help
System running sweet ! !
PLEASE HELP ........ Complete novice
Having a major headache with the central heating !
Condensing boiler ~ Fine ~ warms water no problem
Rads ..... hot when they feel like it ! .....Grunfos pump hot surrounding pipes cool ! ( suspect overheating )
Have checked its turning by removing the...