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thnk you i turn the upstairs return vavles by 1 turn each and that made my downstairs rads to work again thanks for all the help people like you who spend time to help people for free deserve merit THANK YOU

IM NOT SHOUTING IVE GOT BAD SIGHT WELL YOU ARE IN CUBA I NEED YOU TO HEAR ME? I HAVE TRIED EVERYTHING I CAN THINK OF , LAST NIGHT I CHANGED THE 10MM HEP UPSTAIRS TO 15MM HEP WHEN I RAN THE SYSTEM THE RADS UPSTAIRS GOT HOT AND THE RADS DOWN STAIRS ARE NOW COLD . SO I THINK THAT THE REMAINING...

CAN ANYONE TELL ME WHAT IS THE MAXIMUM RUN OF 8MM HEP ON A CENTRAL HEATING SYSTEM BECAUSE MY SYSTEM HAS A LOT OF THIS 8MM HEP. AND UPSTAIRS RADS WONT GET HOT, THE RADIATOR NEAREST TO THE POINT WERE THE PIPES ARRIVE UP STAIRS GETS SLIGHTLY WARM. IF I CHANGE THE UPSTAIRS TO 15MM WILL THAT GET...

There is no airlock i turned the boiler off and at the bottom of where the ppes go upstairs i disconnected the tee and the water gushed out from the upstairs radiators no air came out at all. i done this with the flow and return . The pipes are all from a earlier bosch 26cdi system which was...

THERE IS ONLY 4 RADS ON THIS SYSTEM , 2 UP 2 DOWN I KNOW THERE IS NO AIR OR BLOCKAGE I HAVE TRIED DISCONNECTING ALL THE PIPES ONE BY ONE AND FLOWING WATER THROUGH THEM . COULD THIS BE THE PROBLEM ?.........THE C H FLOW PIPE IS 22MM COPPER FOR 3 METERS THEN IT GOES TO 15 MM PLASTIC, IT IS THEN...

HI CAN ANYONE HELP? I PUT A NEW BOILER IN ON EXISTING RADIATORS. MY OLD BOILER WAS A BOSCH 26CDI AND THE NEW BOILER IS A BIASI 24SE WHEN I FIRST TURNED THE NEW BOILER ON ONLY THE LAST RAD UPSTAIRS WOULD HEAT UP . SO I DRAINED THE SYSTEM DOWN AND RELEASED THE STUCK THERMOVALVES ON THE OTHER...

SORRY ABOUT THE STOPS AND COMMS MY SYSTEM IS FREE OF AIR.

Can any one help i installed a new boiler when i first ran the system on existing radiators only the last radiator upstairs would work all the rest were cold so i drained the system down and found that the thermo vales were stuck closed on the other radiators so i solved that when i refilled...