Error 42 — High pressure switch abnormal

What does 42 mean?

• High pressure switch is open
• Refrigerant overcharge
• Dirty outdoor coil
• Restriction in the system

Click steps to track your progress.

1. 1

   Check the continuity of the high pressure switch.

2. 2

   Verify the refrigerant charge; it may be too high.

3. 3

   Clean the outdoor coil.

4. 4

   Inspect for restrictions in the refrigerant lines.