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POTTERTON PERFORMA 24iHE LOSING HEATING PRESSURE DOWN TO0?

COULD ANYONE TELL ME WHY MY POTTERTON performa 24I HE KEEPS DROPPING PRESSURE AND HAS TO BE RE PRESSSSUIRISED,IT WILL BE PERFECTLY FINE ONE MINUTE THEN DROP TO 0 BAR,
MARINA, November 2008
have you noticed any leaks anywhere,if not check pressure relief valve or expansion vessel,boliers not that old though have you still got warranty

gasman1uk, November 2008
link Click here to see other fixes for Potterton.