hi all, i know this fault code is ,optical water sensor; but what is this sensor 😕 is it the “pressure switch” in sump ❓ or “metering tank” the flow meter thing ❓ because there is` nt an optical sensor listed on spare parts list. cheers all.
it is the black grid switch in the sump at 3 o’clock as you look in it will probs be chocked with gunge, give a good clean, reset and try again, usually dont need replaced just a clean.