Potterton Puma 80 combi boiler hi press problems?

sounds like your expansion tank at back of boiler need re-pumping up to 1 bar. you can do this with a foot pump. there is a valve on the tank, the cental heating system pressure has to be at zero. so you only measure the pressure within the tank. to do this turn the red three bar pressure relief valve anti clockwise.

Ryan
February 2005