What each Carrier code means — and what to do next. Stuck? AAA Comfort Air fixes Carrier systems across Central NJ, often same-day.
Carrier (and its sister brands Bryant and Payne) invented modern air conditioning and build premium furnaces and ACs. Their boards flash a 2-digit numeric status code.
The LED blinks the code: short flashes give the first digit, long flashes the second (e.g., 3 short + 3 long = 33). The pattern repeats. The indicator is a numeric status code (short flashes = 1st digit, long = 2nd).
| Code | What it means | What to do |
|---|---|---|
| 13 | Limit circuit lockout | Overheating/airflow — replace filter, then call us |
| 14 | Ignition lockout | Flame sensor/igniter/gas — call us |
| 21 | Gas heating lockout | Call us |
| 22 | Abnormal flame-proving signal | Flame sensor/gas valve — call us |
| 23 | Pressure switch did not open | Call us |
| 24 | Secondary voltage (fuse) fault | Wiring short — call us |
| 25 | Improper line polarity or grounding | Wiring — call us |
| 31 | Pressure switch stuck open | Vent/inducer/condensate — call us |
| 33 | Limit circuit fault (overheating) | Replace a dirty filter / clear airflow |
| 34 | Ignition proving failure (no flame) | Flame sensor/igniter/gas — call us |
| 41 | Blower motor fault | Call us |
⚠️ Codes can vary by model and control-board revision — always confirm against the label inside your unit’s access panel. For any gas, electrical, or refrigerant fault, call a licensed technician.
The LED blinks the code: short flashes give the first digit, long flashes the second (e.g., 3 short + 3 long = 33). The pattern repeats.
You can try one power cycle at the breaker to clear a one-time fault. But if the same code returns, it’s a real fault — repeatedly resetting a gas or electrical issue can be unsafe. Call AAA Comfort Air at 609-665-3022.
AAA Comfort Air installs and repairs Carrier systems across Cream Ridge and Central New Jersey, with same-day and 24/7 emergency service. Call 609-665-3022.
Book online or call your local Carrier HVAC team — same-day & 24/7 emergency service.
