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Combi probs?

Combi boilier only works when front case is taken off, any ideas why

Dan
October 2013
Heating, Home Heating SystemsCombi Works Ideas
blocked venturi, air pressure switch or fan. not enough suction of air so the ai pressure switch not activating. so when u open the cover more air is drawn in from the room increasing the suction pressure

kash
October 2013

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Combi Boiler Issues - Front Case Removal Fix