:D THANKS FOR THE ADVICE. I HAVE TAKEN THE 3 OFFENDING RADS OFF AND FLUSHED OUT. STILL COLD! I AGREE WITH YOU MATE IT LOOKS LIKE THE TRV'S ARE NO GOOD. HOW DO YOU CHECK TO SEE IF THEY ARE STUCK AND IS THERE ANY WAY OF FREEING THEM OFF OR DO THEY JUST NEED REPLACING. CHEERS FOR ANY TIPS.