E43 — Compressor Discharge Temperature sensor Over Low Protection

What does E43 mean?

This error indicates that the compressor discharge temperature (Td) is abnormally low during normal operation (Td < Pd+10℃ for 5 minutes). If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

• Insufficient load on the system or incorrect operating conditions.
• A faulty compressor discharge temperature sensor.
• Issues with refrigerant flow or charge.

Click steps to track your progress.

1. 1

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

2. 2

   Wait for at least 30 seconds, then restore power.

3. 3

   Allow the unit to attempt to operate.

4. 4

   If the error persists or recurs frequently, contact a qualified service technician to assess system operation and sensor readings.