how to fix carrier furnace code 13?

Carrier furnaces can sometimes display error code 13, which is a limit circuit lockout. This error code indicates that the limit or flame rollout switch has been open for more than 3 minutes. One common cause of this error code is restricted airflow due to a higher MERV-rated filter. It is important to ensure proper airflow by checking switch operation and continuity, cleaning filters and ducts, and ensuring there is proper combustion air. If these troubleshooting steps do not resolve the issue, it may be necessary to replace the limit or flame rollout switch.

Key Takeaways

• Carrier furnace code 13 indicates a limit circuit lockout.
• Restricted airflow can trigger error code 13.
• Check switch operation, clean filters, and ducts for proper airflow.
• If troubleshooting steps fail, consider replacing the limit or flame rollout switch.
• Safety should always be the top priority when dealing with furnace issues.

Troubleshooting Carrier Furnace Code 13

When it comes to troubleshooting carrier furnace code 13, there are several steps you can take to try and resolve the issue before calling a professional. By following these troubleshooting tips, you may be able to identify and fix the problem yourself.

1. Check switch operation: Start by checking the high limit switch to ensure it is operating correctly. Verify if the switch is open and if it is, it may need to be replaced.
2. Inspect air flow: Look for any air flow issues, such as a clogged filter, obstructed vents, or blocked ducts. Restricted airflow can cause the furnace to overheat and trigger the error code. Clean or replace the filter and remove any blockages that may be hindering proper air circulation.
3. Clean A/C evaporator coil: Cleaning the A/C evaporator coil can improve the performance of your furnace. Use a soft brush or vacuum cleaner to remove any dirt or debris that may have accumulated on the coil over time.
4. Ensure blower wheel functionality: The blower wheel is responsible for circulating air throughout the system. Check if it is clean and functioning properly. If necessary, clean the blower wheel to improve its efficiency.
5. Reset the flame rollout switch: In some cases, resetting the flame rollout switch may resolve the issue. This can be done by locating the switch and pushing the reset button. However, it is important to note that resetting the switch should only be done if there is no indication of an actual problem with the system.
6. Consider increasing blower motor speed: If you have tried all the previous steps and the error code persists, you may want to consider increasing the speed of the blower motor. This can help improve air flow and prevent the limit circuit lockout error.

If your troubleshooting efforts do not resolve the carrier furnace code 13, it is recommended to contact a professional HVAC technician. They have the expertise and tools to diagnose and fix more complex issues that may be causing the error code.

Having a basic understanding of carrier furnace code 13 and following these troubleshooting steps can help you address the issue and potentially avoid costly repairs. However, remember to prioritize your safety and consult a professional if you are unsure or uncomfortable performing any of these tasks.

Understanding Carrier Furnace Error Code 13

Carrier furnace error code 13 indicates that the limit or flame rollout switch has been open for more than 3 minutes. The limit switch is a safety device that shuts off the furnace if it detects that the heat exchanger is getting too hot. The flame rollout switch is another safety device that shuts off the furnace if it detects flames rolling out of the burner area.

If either of these switches are tripped, it is important to determine the cause of the issue. This could be due to back drafts, blocked flue, or a plugged or damaged heat exchanger. It is important to address these issues promptly to ensure the safe operation of the furnace.

Here is a breakdown of the potential causes for Carrier furnace error code 13:

If you encounter this error code, it is recommended to check for any visible signs of these potential issues. Clearing any blockages, ensuring proper ventilation, and addressing heat exchanger problems can help resolve the error code and ensure the safe operation of your Carrier furnace.

Here is an image illustrating the parts involved in Carrier furnace error code 13:

By understanding the underlying causes of Carrier furnace error code 13 and taking necessary steps to address the issues, you can restore the proper functioning of your furnace and maintain a comfortable living environment.

Conclusion

Dealing with the carrier furnace code 13 error can be frustrating, but there are steps you can take to resolve the issue. By checking for air flow problems, ensuring proper switch operation, and addressing any combustion air concerns, you can often fix the problem on your own. However, if these steps do not solve the issue, it’s important to seek professional assistance.

When troubleshooting carrier furnace code 13, it’s crucial to prioritize safety. If you are unsure or uncomfortable performing any of the troubleshooting steps, it’s best to call a professional technician who can help you identify and fix the problem. Remember, your safety and the proper functioning of your furnace are paramount.

In conclusion, carrier furnace code 13 is a common error that can typically be resolved with the right troubleshooting methods. By following the steps outlined in this article and seeking professional assistance when needed, you can ensure the efficient and safe operation of your carrier furnace.