Code 49 (18VS,19VS/V-HP/AC) — Compressor Over Current Fault

What does 49 mean?

This fault indicates that the compressor in an 18VS, 19VS/V-HP/AC unit has drawn excessive current, causing a safety shutdown. This protects the compressor from damage.

• Refrigerant system issues (e.g., overcharge, blockage)
• Motor winding fault in the compressor
• Electrical supply issue (voltage too low)
• Stuck compressor or mechanical binding

Click steps to track your progress.

1. 1

   Turn off the power to the outdoor unit at the circuit breaker for at least 30 seconds.

2. 2

   Ensure the outdoor coil is clean and free of obstructions, and the fan is working.

3. 3

   Check that air filters in the indoor unit are clean.

4. 4

   If the overcurrent fault recurs, contact a qualified HVAC technician immediately, as this indicates a serious compressor or refrigerant system problem.