J3 — Faulty discharge pipe temperature sensor

What does J3 mean?

This indicates that the sensor measuring the temperature of the discharge pipe is not working correctly. This sensor is important for monitoring system performance.

• Faulty discharge pipe temperature sensor
• Loose or damaged sensor wiring

Click steps to track your progress.

1. 1

   Inspect the wiring connected to the discharge pipe temperature sensor for security and damage.

2. 2

   Ensure the sensor is properly attached to the pipe.

3. 3

   If the wiring is okay, a qualified technician should test and possibly replace the sensor.