Red 2 Flashes, Green 2 Flashes (Single System) — Indoor Air Sensor Failure

What does Red 2 Flashes, Green 2 Flashes mean?

Both the red and green LED lights on the indoor unit flash two times simultaneously. This signals a fault with the indoor air temperature sensor, which measures the room temperature.

• Loose or disconnected indoor air sensor wire.
• Damaged indoor air sensor.
• Faulty connection on the indoor unit PCB.

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power switch.

2. 2

   Locate the indoor air sensor (usually near the return air vent) and check for visible damage or loose connections.

3. 3

   After checking, restore power to the unit and see if the error clears.

4. 4

   If the sensor is damaged or the fault remains, contact a service technician for replacement.