Error 43 — Low pressure switch abnormal

What does 43 mean?

• Low pressure switch is open
• Low refrigerant charge
• Blockage in the system
• Low indoor coil temperature

Click steps to track your progress.

1. 1

   Check the continuity of the low pressure switch.

2. 2

   Verify the refrigerant charge; it may be too low.

3. 3

   Inspect for blockages in the low pressure or liquid lines.

4. 4

   Check for low heat on the indoor coil.