F2 — Low pressure sensor (LS) trouble

What does F2 mean?

This error indicates a malfunction with the low-pressure sensor (LS), which is crucial for monitoring the refrigerant system's low-side pressure. A faulty sensor can lead to incorrect pressure readings and system shutdown.

• Faulty low-pressure sensor (LS).
• Loose or corroded wiring connection to the sensor.
• Control board issue affecting sensor readings.

Click steps to track your progress.

1. 1

   Turn off the main power to the outdoor unit by switching off its dedicated circuit breaker.

2. 2

   Locate the low-pressure sensor on the outdoor unit's refrigerant lines.

3. 3

   Carefully inspect the sensor's electrical connections for any signs of damage, corrosion, or looseness.

4. 4

   Ensure the sensor itself is not physically damaged or leaking refrigerant.

5. 5

   Power cycle the unit by turning the breaker back on after inspection.

6. 6

   This issue typically requires a qualified technician to test the sensor and its circuit for proper operation.