Air Conditioner: Hard starting / stalls on restart
Hard starting / stalls on restart on a air conditioner: Possible causes and checks for: hard starting / stalls on restart.
Common causes of hard starting / stalls on restart
- Low voltage (≥10% low) on PSC motor
- Restart before pressures equalize
How to fix hard starting / stalls on restart: step by step
- Wait for equalization
- Add start cap + relay per A1. pp.835, 844 [809, 818]
If the unit shows an error code, look it up: Carrier Air Conditioner codes Goodman Air Conditioner codes KeepRite Air Conditioner codes Lennox Air Conditioner codes Trane Air Conditioner codes
Source: General HVAC service practice — verify per model. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.