DIY Doctor UK DIY Forums

HI THERE
I HAVE JUST FITTED A DIVERTER DIAPHRAGM ON MY HALSTEAD COMBI BOILER 82 BECAUSE MY HOT WATER DID NOT WORK ,THIS FIXED IT AND HAS OBVIOUSLY SHROUDED ANOTHER FAULT ,WHEN YOU TURN THE HOT WATER ON THE HEATING GOES OFF UNTIL YOU TURN OFF THE HOT WATER ,CAN YOU HELP PLEASE??????? [/b]

That's how combi boilers work - hot water gets priority, so if you run a bath you'll find the radiators will cool down.

htg