Currently have to control heating manually by putting on hot water and manually opening 2 zone port valve. So heating only works if hot water on and manually open valve. If switch hot watet off but leave heating switched on boiler doesnt fire and nothing happens. There are no fault signs on boiler.Have swapped port valve and no change. Its as if no power is reaching system. Is it possible that could be pcb fault in boiler so only fires for hot water but not for heating? boiler is a glowworm ultra compact hxi
- posted
7 years ago