Coil Temp Sensor Fault 55

What does 55 mean?

A fault has been detected with the coil temperature sensor. This could be due to a disconnected harness, a broken wire, an improperly attached sensor, a damaged sensor, or hardware damage to the outdoor unit (ODU) control.

• Sensor Harness not connected to ODU control
• Broken or loose harness wire
• Coil Thermistor not properly attached or in wrong location
• Broken or Damaged Sensor
• Hardware damage to ODU control

Click steps to track your progress.

1. 1

   Ensure the sensor harness plug is securely connected to the ODU control board.

2. 2

   Check the sensor harness for continuity to detect any broken or loose wires.

3. 3

   Verify that the Coil Thermistor is properly clipped to the distributor entry-tube.

4. 4

   Check the sensor for damage; its resistance should be 10kOhm at 77°F; replace if faulty.

5. 5

   If all checks pass, the ODU control hardware may be damaged and require replacement.