I have a Worcester Bosch 30CDi that only intermittently heats the house. To get it to do so when it stops, I sometimes can kick it into life by turning the room stat on and off rapidly, sometimes by turning the programmer on and off rapidly, and always by going up to the airing cupboard and turning the HW thermostat up. Doing these things will make the pump start. Otherwise the pump doesn’t run (except if we use a lot of HW, of course)
The motorised valve on the heating is in its sleep position when the boiler is stalled, the position in which the lever on the side does nothing. Once we get going the valve opens up.
The valve on the HW seems to work fine.
The room stat is a Honeywell T6360, and I’m about to replace that, because for a while a few weeks ago flicking the existing one on and off reliably started the pump.
The programmer is a Honeywell ST9400C.
My money is currently on a fault on the boiler pcb but my heating engineer doesn’t seem to think so (but hasn’t come up with any other idea)
Help, please! Thanks for any thoughts.
The motorised valve on the heating is in its sleep position when the boiler is stalled, the position in which the lever on the side does nothing. Once we get going the valve opens up.
The valve on the HW seems to work fine.
The room stat is a Honeywell T6360, and I’m about to replace that, because for a while a few weeks ago flicking the existing one on and off reliably started the pump.
The programmer is a Honeywell ST9400C.
My money is currently on a fault on the boiler pcb but my heating engineer doesn’t seem to think so (but hasn’t come up with any other idea)
Help, please! Thanks for any thoughts.