Carrier Error Code 11: No Previous Error
LED Blink Pattern
1 short blink, 1 long blink.
How to Fix Carrier Code 11
- Step 1: Verify that the HVAC system is operating as expected (heating or cooling).
- Step 2: If the system is functioning normally, no action is required. The 'No Previous Error' code is informational.
- Step 3: If you are experiencing issues, note the symptoms and contact a qualified HVAC technician for further diagnosis.
How to Reset Carrier Code 11
- Turn off the furnace power switch, usually located on or near the unit.
- Turn off the circuit breaker for the furnace. Wait 30 seconds.
- Restore power at the breaker and flip the furnace switch back on.
- Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Carrier Error Code 11 Mean?
The Carrier error code 11, labeled as "No Previous Error," simply means that the system's control board hasn't stored any prior error codes in its memory. Think of it like a clean slate. This is perfectly normal when you first install the unit, after a technician clears the error history during maintenance, or after a power outage that resets the board's memory. It doesn't indicate a problem; rather, it confirms that the system hasn't encountered any issues recently. If you're seeing this code during normal operation and the system seems to be working fine, there's nothing to worry about. However, if you're troubleshooting a problem and expect to see a different error code, it might indicate that the control board's memory was recently cleared, or the error you're experiencing is intermittent and hasn't been recorded yet. In this case, continue monitoring the system for any recurring issues.
Common Causes
- Normal system startup after installation.
- Error history was recently cleared by a technician.
- Recent power outage or reset of the control board.
- Intermittent issue that hasn't been recorded yet.
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| System is newly installed or error history was cleared. | Verify system operation (heating/cooling). | System operates normally. |
| System is experiencing issues, but code 11 is displayed. | Monitor system for recurring issues and note any symptoms. | Any new error codes should be recorded. |
Applicable Carrier Models
- 24ABC6 Air Conditioner(electric)
- 25HBC5 Heat Pump(electric)
- Base Series(gas)
- Base Series Furnace(gas)
- Comfort 80 Gas Furnace(gas)
- Comfort Series(electric)
- Comfort Series Furnace(gas)
- Comfort Series Heat Pump(electric)
- Infinity 20 Heat Pump with Greenspeed Intelligence(electric)
- Infinity 80(gas)
- Infinity Series(electric)
- Infinity Series Furnace(gas)
- Infinity Series Heat Pump(electric)
- Performance Boost 95 Furnace(gas)
- Performance Boost Furnace(gas)
- Performance Series(gas)
- Performance Series Furnace(gas)
- Performance Series Heat Pump(electric)
- WeatherMaker 8000(gas)
- WeatherMaker 9300(gas)
- WeatherMaker Furnace(gas)
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Control Board | — | — | — |
Related Codes on Same Models
Other codes that affect the same Carrier model families as 11.
| Code | Description | Severity |
|---|---|---|
| 12 | Blower On After Power Up | Warning |
| 13 | Limit/Rollout Fault | Critical |
| 14 | Ignition Lockout | Critical |
| 21 | Gas Heating Lockout | Critical |
| 22 | Abnormal Flame | Critical |
| 23 | Pressure Switch Fault | Warning |
| 31 | High Stage Pressure Fault | Warning |
| 32 | Low Flame Sense | Warning |
| 33 | Limit/Rollout Switch Lockout | Critical |
| 34 | Ignition/Flame Sense Fault | Warning |