Error 128 — EVA IN temperature sensor detached

What does 128 mean?

The evaporator inlet (EVA IN) temperature sensor in the indoor unit has become physically detached from the EVA IN pipe. This means the unit cannot accurately measure the refrigerant temperature at this critical point.

• Sensor not properly secured during installation
• Vibration causing the sensor to detach
• Broken mounting clip or fastener

Click steps to track your progress.

1. 1

   Turn off the indoor unit's power at the circuit breaker.

2. 2

   Locate the EVA IN sensor and physically reattach it securely to the EVA IN pipe.

3. 3

   Ensure any clips or fasteners holding the sensor are tight and unbroken.

4. 4

   Restore power to the unit and check if the error clears.

5. 5

   If the sensor cannot be securely reattached or the error returns, contact a service technician.