E49 — Low Pressure Switch Abnormality

What does E49 mean?

This error indicates that the low pressure switch (LP) has disconnected for 5 seconds, reporting a fault. If this occurs 3 times in an hour, the failure will be confirmed as unresumable.

• Insufficient refrigerant charge or a refrigerant leak.
• Blockage in the suction line.
• A faulty low pressure switch.

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 check the refrigerant system and pressure switch.