Choose your Carrier appliance
About Carrier
Carrier is an American heating and cooling company founded by Willis Carrier, the engineer credited with inventing modern air conditioning. Carrier central air conditioners and heat pumps report faults by flashing a status light on the outdoor unit's control board, while its ductless mini-splits show a code on the indoor unit's display.
Carrier air conditioner error codes
- Solid / 1 / 2Status light showing normal operation
- 16Lost communication with the Infinity control
- 25Model plug missing or wrong
- 31 / 84High-pressure switch tripped or locked out
- 32 / 83Low-pressure or discharge temperature trip
- 45Outdoor control board fault
- 46Brown-out: supply voltage too low
- 47No 230-volt power reaching the outdoor unit
All 19 Carrier air conditioner codes
Before you start
- Find your model number. It's on the rating label, usually inside the door or lid, on the frame, or on the back or side panel.
- Try a reset. Unplug the appliance or switch off its breaker for 10 minutes. Many codes are one-off glitches.
- Stay safe. Never bypass safety switches or work on live wiring, gas or refrigerant lines. Each guide tells you when to call a technician.