I've rescued one of these from a skip, 2 screens 1 outdoor unit, and discovered why it was thrown out. The outside temperature/humidity doesn't register.
I'm thinking that the sensor in the outdoor unit is faulty so I've had a look around Google and can't find anything corresponding with the number written on the sensor (assuming that what I'm looking at is the sensor)
Can anyone point me in the right direction for a replacement sensor or shall I just return it to the skip?