I have a Worcester 28CDi, the exhaust fan was recently changed because it had had become noisy and had started to seize up.
At the time we were also getting Air Pressure Fault indications (flashing HW light).
Have been through the diagnosis in the book with CH engineer, cleaned sensing tubes out, checked flue OK, and changed pressure switch.
Still intermittent fault. When fault appears switch off at Control Panel, count to 10 switch on and boiler fires up OK. Will now probably keep going for rest of day. This happens once every couple of days. Worcester Tech. Advice line suggest new PCB, am OK with this if really at fault but at £175+fitting+vat could be an expensive mistake.
Any suggestions for a cure or do I have to spend the big bucks ?
At the time we were also getting Air Pressure Fault indications (flashing HW light).
Have been through the diagnosis in the book with CH engineer, cleaned sensing tubes out, checked flue OK, and changed pressure switch.
Still intermittent fault. When fault appears switch off at Control Panel, count to 10 switch on and boiler fires up OK. Will now probably keep going for rest of day. This happens once every couple of days. Worcester Tech. Advice line suggest new PCB, am OK with this if really at fault but at £175+fitting+vat could be an expensive mistake.
Any suggestions for a cure or do I have to spend the big bucks ?