Outdoor Unit LED 7 Flashes — Outdoor temperature thermistor error

What does 7 Flashes (Outdoor Unit) mean?

The LED on the outdoor unit flashes seven times. This indicates a problem with the outdoor temperature thermistor, which measures the ambient air temperature.

• Faulty outdoor thermistor.
• Loose or damaged wiring to the thermistor.
• Obstruction or debris affecting the thermistor's reading.

Click steps to track your progress.

1. 1

   Power cycle the heat pump system by turning off the main breaker for 60 seconds and then restoring power.

2. 2

   Inspect the outdoor thermistor for any physical damage or blockage by debris.

3. 3

   Ensure the thermistor is securely mounted and its wiring connections are intact (only if safely accessible).

4. 4

   If the error persists, contact a qualified technician to test or replace the outdoor thermistor.