my ideal isar 35 keeps pressurising even when the filler loop is turned off it has also blown the automatic air vent could the air vent have caused the problem

jon tidy, December 2010

few things need checking, does the pressure rise to 3+ when in use? If so check expansion vessel. This is most likely cause unless filling loop broken. AAV breaking wouldn't cause it to keep filling more info contact me via facebook look for tmsgas

Stag Heating TMSGAS, December 2010