Otis · 400 Elevator
Indicates an unplugged or faulty temperature sensor within the refrigeration system. This prevents accurate temperature readings for refrigeration control, potentially leading to incorrect cooling or heating.
Click steps to track your progress.
Check the temperature sensor connection at the control board (VMC) to ensure it is plugged in.
Check that the sensor is wired properly and that its pins are making contact.
If the sensor is unplugged, replug it.
If the sensor is miswired, replace it.
If connections are bad, attempt to repair them or replace the sensor.