Recent content by DJB1953

Worcester Bosch greenstar hi flo 50/50. Just changed the room stat from mechanical to digital. The stat is wired to a LP111 timer . I keep getting 130 volt backfed to boiler pcb even when the timer is switched off. I get the same voltage if the room stat is removed. When timer is removed then...

bosch greenstar 50/50 is getting an electrical backfeed of 130volts on LR even when the timer is off. With no timer zero volts on LR.