American Standard | AC and Heat Pump

Error Code Green LED (Intermittent Flash – 1 flash every 4 sec)

Troubleshooting guide for the American Standard AC and Heat Pump system fault Green LED (Intermittent Flash – 1 flash every 4 sec).

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.

System Diagnosis

Hard lockout active.

Potential Causes & Solutions

  • The system is locked out due to a serious fault (e.g.
  • high/low pressure).
  • The red LED will flash the specific error code; power cycling is usually required to reset after resolving the issue.

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