Troubleshooting American Standard Air Conditioners: Decoding Blinking Red Lights

American Standard AC Red Light Blinking


For over a century, American Standard air conditioners have graced the market, offering affordability and suitability for countless American homes. However, encountering an ac blinking red light on your air conditioner may leave you questioning if it signals a problem. In this investigation, we delve into the meaning behind the blinking red light and provide comprehensive answers to guide you through potential issues.

Understanding Error Codes: An AC Blinking Red Light

When a red light blinks on an American Standard air conditioner, it signifies a specific problem, with different blink patterns indicating distinct issues. Pay close attention to the following three blink codes:

2 Flashing Codes – Issues with Cold Air Production:

– Faulty control lamp
– Faulty flame detector
– Obstructed air filter
– Inadequate gas supply
– Condensate line clog
– Clogged vents
– Incorrect thermostat setting

3 Flash Codes – Insufficient Airflow:

– Failure of an inductor
– Blocked vent pipe
– Leaking pressure switch hose
– Faulty pressure switch

4. Flash Error Code – Flame Not Lighting:

– Clogged or faulty ignitor

Decoding the Blink Codes: Understanding the Issues and Solutions

If the red light on your American Standard air conditioner is consistently blinking, it indicates proper functionality. However, deviations from the normal blink pattern reveal error codes, each associated with specific issues and solutions. Let’s explore the problems behind each code and how to address them.

Flash Error Code 2:

If the red light blinks twice, indicating cold air production, potential issues include:
– Faulty control lamp: Address air bursts, gas cuts, or temporary gas shortages.
– Faulty flame detector: Clean the detector to resolve cold air issues after shutdown.
– Air filter clog: Replace the air filter to restore proper airflow and prevent overheating.
– Inadequate gas supply: Ensure sufficient gas supply for proper heating.
– Condensate line clog: Remove line obstruction to prevent water backup.
– Clogged vents: Caulk duct system holes to prevent cold air infiltration.
– Incorrect thermostat setting: Set the thermostat to AUTO for efficient heating.

Three Flash Error Codes – Insufficient Airflow:

If the red light blinks thrice, signaling insufficient airflow, potential issues include:
– Failure of an inductor: Check for broken induction motor and address accordingly.
– Vent tube clog: Remove obstructions in vents to ensure proper heating.
– Pressure switch hose damage: Reconnect or replace damaged pressure switch hose.
– Pressure switch failure: Replace a faulty pressure switch to restore airflow.

Flash Error Code 22 – Flame Not Lighting:

A blinking red light 22 times may indicate issues with the ignitor. Try resetting the system, and if unsuccessful, inspect and clean the ignitor or replace it.

Repair or Replace: Considerations for Decision-Making

When deciding whether to repair or replace your American Standard air conditioner, consider the following factors:
– End of useful life: Replace if the system is no longer cost-effective to repair.
– Suboptimal performance: Replace to avoid excessive energy costs.
– Valid warranty: Utilize warranty benefits for cost-effective repairs or replacements.
– Economic returns: Evaluate whether repairing or replacing yields better returns.
– Frequent failures: Consider replacement if the air conditioner consistently malfunctions.


An ac blinking red light on your American Standard air conditioner serves as a valuable indicator of potential issues. Understanding the blink codes and addressing them promptly, along with thoughtful consideration of repair or replacement options, ensures the continued efficiency and longevity of your HVAC system.

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About the author


I am Ben , a seasoned HVAC specialist with over 6 of experience in the HVAC industry. I holds HVAC Certification and has a proven track record in providing expert advice on HVAC systems.