E231 (Red ON, Green Blink, Yellow OFF) — Condenser temperature sensor error

What does E231 mean?

The outdoor unit's PCB LED displays E231 when an open or short circuit is detected in the condenser temperature sensor. This sensor monitors the temperature of the outdoor coil, crucial for efficient operation.

• Damaged condenser temperature sensor
• Loose or faulty sensor wiring connection
• Faulty outdoor PCB

Click steps to track your progress.

1. 1

   Turn off the main power to the outdoor unit at the circuit breaker.

2. 2

   Visually inspect the condenser temperature sensor and its wiring for any signs of damage or disconnections.

3. 3

   Ensure the sensor is properly installed on the condenser coil.

4. 4

   Restore power to the unit. If the error continues, contact a qualified technician to test or replace the sensor.