Hi guys, I have a baxi duo tec 40 just under 3 years old, ( all ready fitted in new build apartment ) fault 19 which indicates low pressure, the pressure reading is on empty, ( needs re pressuring ) I don't know how fast this went down as I have tenants in apartment and they know zilch, boiler serviced in November and all ok Inc certificate in place, I can refill it but what would cause this to happen and how much would parts and labour cost roughly ps would this fault be down to one thing, or could it be a number of things, thanks.