How to Clear YORK Fault Codes: A Comprehensive Guide


Clearing YORK fault codes is a crucial step in troubleshooting and maintaining your HVAC system. This comprehensive guide will walk you through the step-by-step process of clearing YORK fault codes, providing detailed technical information and expert-level insights to ensure a successful and safe resolution.

Identifying and Clearing YORK Fault Codes

how to clear YORK fault codes

Step 1: Locate the “Last Error” Button

The first step in clearing YORK fault codes is to locate the “Last Error” button on your YORK HVAC unit. This button is typically located on the control panel or the circuit board of the unit. It is important to note that the exact location of the “Last Error” button may vary depending on the model and year of your YORK HVAC system.

Step 2: Press and Hold the “Last Error” Button

Once you have located the “Last Error” button, press and hold it for at least five seconds. This action will clear the stored fault codes in the unit’s memory. You will know the process is complete when the LED on the control panel flashes three green flashes.

Step 3: Identify the Fault Codes

After clearing the fault codes, it is essential to identify the specific fault codes that were stored in the unit’s memory. This information can be found in the user manual or by consulting with a professional HVAC technician. Common fault codes for YORK air handlers include “Open limit switch,” while YORK heat pumps may display “Pipe freeze timer expired.”

Step 4: Reset the Fault Codes

To reset the stored fault codes on a YORK Affinity YZF unit, follow the instructions provided in the user manual or consult with a professional HVAC technician. This step may involve navigating through the unit’s menu system or using specific reset procedures.

Step 5: Troubleshoot and Repair the Underlying Issue

If the fault codes persist after clearing and resetting them, there may be a more serious issue with the YORK HVAC unit that requires professional repair. It is important to identify and address the underlying cause of the fault codes to prevent them from reappearing in the future.

Technical Considerations and Expert Insights

Fault Code Identification and Interpretation

When dealing with YORK fault codes, it is crucial to have a thorough understanding of the specific codes and their meanings. Each fault code corresponds to a particular issue within the HVAC system, and correctly interpreting these codes can greatly assist in the troubleshooting and repair process.

Common YORK Fault Codes and Their Meanings

Fault Code Meaning
“Open limit switch” Indicates an issue with the limit switch, which is responsible for monitoring the temperature and pressure within the HVAC system. This fault code is commonly seen in YORK air handlers.
“Pipe freeze timer expired” Signifies a potential issue with the refrigerant lines or the defrost cycle, which is often encountered in YORK heat pumps.
“Compressor short cycle” Suggests a problem with the compressor, such as a failed start capacitor or a refrigerant leak.
“Outdoor fan motor failure” Indicates an issue with the outdoor fan motor, which is responsible for circulating air over the outdoor coil.

Safety Considerations

When working with HVAC systems, safety should always be the top priority. It is essential to follow all manufacturer instructions and guidelines to ensure the safe operation and maintenance of the YORK HVAC unit. This includes wearing appropriate personal protective equipment (PPE), such as gloves and safety glasses, and disconnecting the power supply before attempting any repairs or maintenance tasks.

Professional Assistance

While the steps outlined in this guide can be performed by DIY enthusiasts, it is important to recognize the limitations of one’s own expertise. If you are not comfortable or confident in your ability to properly clear YORK fault codes or address the underlying issues, it is highly recommended to consult with a professional HVAC technician. They have the necessary training, tools, and experience to diagnose and resolve complex HVAC problems safely and effectively.


Clearing YORK fault codes is a crucial step in maintaining the optimal performance and longevity of your HVAC system. By following the detailed instructions and expert-level insights provided in this guide, you can successfully clear YORK fault codes and address the underlying issues, ensuring your HVAC system continues to operate efficiently and reliably.


  1. York Heat Pump: How to Clear Fault codes and more! – YouTube
  2. York furnace problems. I am trying to find the ‘last error – JustAnswer
  3. How to reset stored fault codes on York Affinity YZF – HVAC-Talk
  4. York Furnace Lockout and Diagnostic Codes – GHAC :: Knowledgebase
  5. How to reset fault code on old York e2fh042s06c. : r/HVAC – Reddit