Code 52-02 OCT Shorted - Outdoor Coil Thermistor has a short circuit.

What does 52-02 mean?

The outdoor coil thermistor, which is used to monitor the coil during defrost, is reporting a resistance below 1kohm for 1 second, indicating a short circuit. When this fault is active, defrost cycles will occur for their maximum programmed duration. This fault does not lead to a system malfunction.

• Short circuit in the outdoor coil thermistor wiring.
• Short circuit at the thermistor connector.
• Faulty outdoor coil thermistor sensor.
• Faulty PCM if thermistor resistance measures within range.

Click steps to track your progress.

1. 1

   Measure the resistance value of the outdoor coil thermistor at the PCM connector.

2. 2

   If the measured value is below 1kohm, carefully inspect the thermistor wiring and its connector for any signs of a short circuit.

3. 3

   If no shorts are visually observed, replace the outdoor coil thermistor sensor.

4. 4

   If the measured resistance is within the allowable range, the PCM (Processor Control Module) may be faulty and require replacement by a qualified technician.