American Standard | AC and Heat Pump

Error Code Green LED (Slow Flash – ~1x/second)

Troubleshooting guide for the American Standard AC and Heat Pump system fault Green LED (Slow Flash – ~1x/second).

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

Standby/Idle (normal, no active call).

Potential Causes & Solutions

  • No action needed.

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