I HAVE A PROB WITH MY UPSTAIRS HEATING TWO OF MY RADS WONT WORK TRYED CLEANING THE SYSTEM THEY WORK FOR A WHILE BUT AFTER SHORT TIME THEY SEEM TO STOP THINK I MIGHT HAVE AIR LOCK PROB THE WATER GOING IN TO THE HOTWATER TANK UP STAIRS IS HOT TO THE TANK THEN THE PIPE IS COLD COMING OUT THE TOP OF THE TANK THANKS FOR ANY HELP GIVEN
Slightly confused....2 tanks in loft, only bother with the small one. It will have a cold water inlet at the top, a flow and expansion pipe at the bottom, and an expansion pipe that curves over the top. This tank should have around 4" of water in it, and when you drain or bleed the rads the water should be replenished. So, if the tank has water in it, either the rad valves are off or they are blocked with sludge. If the water that bleeds out is black, then its likely to be a sludge blockage issue.
John
October 2009
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