Replacing the Air Probe

To avoid electrical shock or property damage, disconnect power before installing or servicing equipment. A qualified technician must perform the service procedures.

  1. Remove the crosshead screws securing the bottom, rear cover and let hinge down.

  2. Cut wires ties to probe wires.

  3. Unplug the probe from the wire harness.

  4. Using a multimeter or ohmmeter, check across the probe terminals for the correct ohms using the RTD Resistance Chart. If the probe proves faulty, continue onto step 5. If probe is good, replace wire ties on wires.

  5. Using a 3/4” wrench, loosen probe strain relief and pull the probe from the unit.

  6. Install new probe in reverse order, extending the probe 1/8” into cabinet.

    Some probes are held into place by a probe bracket instead of a strain relief. Press on the edge of the bracket to relax the tension on the probe and then pull probe from unit. Extend the new probe about 1/4” into cabinet.