My C/H SYSTEM IS WORKING OK EXCEPT FOR 2 RADS -1 IN A BEDROOM AND 1 IN A DOWNSTAIRS ROOM ,BOTH ARE COLD. I HAVE TRIED TO BLEED THEM BUT NO AIR COMES OUT JUST WATER. THE INFEED PIPE ON THE DOWNSTAIRS ONE IS HOT BUT THE UPSTAIRS ONE IS COLD.
HELP NEEDED PLEASE!!
* SYSTEM IS ABOUT 25 YEARS OLD WITH A NEW BOILER 10 YEARS AGO. THE FEEDPIPES ARE ABOUT 12 mm.