Carrier Error Code 13: Limit/Rollout Fault
How to Fix Carrier Code 13
- Step 1: Turn off the furnace immediately at the breaker.
- Step 2: Check and replace your air filter if it's dirty.
- Step 3: Ensure all vents are open and not blocked by furniture.
- Step 4: Call a qualified HVAC technician to inspect the furnace.
How to Reset Carrier Code 13
- 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.
What does 13 mean?
The Carrier error code 13, often displayed as a blinking LED pattern, signifies a 'Limit/Rollout Fault'. This means that either a limit switch or a rollout switch within your furnace has been triggered. These switches are safety devices designed to shut down the furnace when it detects potentially dangerous conditions like overheating or a flame where it shouldn't be. A limit switch monitors the furnace's internal temperature, and if it gets too hot, the switch opens, cutting off the gas supply. A rollout switch detects flames outside the normal burner area, indicating a potentially hazardous situation.
Because this code indicates a potential safety issue, it's important to address it promptly. Continuing to run the furnace with this error could lead to equipment damage or, more seriously, a fire or carbon monoxide poisoning. Do not attempt to bypass any safety switches.
Affected Models
- Performance Series Furnace
- Comfort Series Furnace
- Infinity Series Furnace
- Performance Series
- Base Series Furnace
- Performance Boost Furnace
- Performance Boost 95 Furnace
- WeatherMaker 8000
- WeatherMaker 9300
- Infinity 80
- WeatherMaker Furnace
- 24ABC6 Air Conditioner
- 25HBC5 Heat Pump
- Performance Series Heat Pump
- Infinity Series
- Base Series
- Comfort Series
- Infinity Series Heat Pump
- Comfort Series Heat Pump
- Infinity 20 Heat Pump with Greenspeed Intelligence
- Comfort 80 Gas Furnace
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Limit Switch | KH42WZ008 | — |
| Rollout Switch | — | — |
| Blower Motor | — | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 11 | No Previous Error | Info |
| 12 | Blower On After Power Up | Warning |
| 14 | Ignition Lockout | Critical |
| 21 | Gas Heating Lockout | Critical |
| 22 | Abnormal Flame | Critical |
| 23 | Pressure Switch Fault | Warning |
| 24 | Secondary Voltage Fuse | Warning |
| 31 | High Stage Pressure Fault | Warning |
| 32 | Low Flame Sense | Warning |
| 33 | Limit/Rollout Switch Lockout | Critical |