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American Standard AC Red Light Blinking – What Causes It And How To Resolve The Issue?

American Standard AC Red Light Blinking – What Causes It And How To Resolve The Issue?

The American Standard air conditioner brand has a long-standing presence in the market, offering affordable and suitable options for many American households. However, encountering a red light blinking on your AC unit may indicate a problem. In this research, we have explored the reasons behind this issue and provided solutions to help you resolve it effectively.

American Standard AC units feature various flash error codes, each indicating a specific problem. We will focus on three flash codes and their respective causes:

Two flash codes occur when the furnace blows cold air, typically due to:

  • A faulty pilot light
  • A dirty flame detector
  • A clogged air filter
  • Low gas supply
  • Clogged condensate lines
  • Damaged ductwork
  • Incorrect thermostat settings

Three flash codes indicate insufficient airflow, which can result from:

  • A faulty inducer
  • A blocked vent pipe
  • A damaged pressure switch hose
  • A faulty pressure switch

A 22 flash error code occurs when the flame fails to ignite, often due to a dirty or faulty ignitor.

Understanding these flash codes and their underlying problems is crucial for effectively addressing each situation. We also provide tips for maintaining your AC unit in good condition and offer considerations for deciding whether to repair or replace your AC.

Why Is The Red Light On Your American Standard AC Blinking?

A steady red light on your American Standard AC indicates normal operation. However, an abnormal blinking pattern suggests a problem. Each flash error code represents a specific issue, determined by the number of times the red light blinks.

American Standard AC Red Light Blinking – What Causes It And How To Resolve The Issue?

To understand the cause behind the blinking light, let’s explore these problems and their solutions:

Two Flash Error Code

When the red light blinks twice, your AC blows cold air. This issue can stem from various reasons, including:

  • Faulty Pilot Light: Sometimes, pilot lights go out, typically due to a sudden gush of air, gas supply interruption, or temporary shortage. Loose or malfunctioning thermocouples, which detect heat loss from the pilot light and shut off the gas valve to prevent gas leakage, can also cause this issue. Cleaning or replacing the thermocouple may be necessary.
  • Dirty Flame Detector: AC units without pilot lights use flame detectors to complete heating cycles. Over time, dust and grime accumulate on the detector or sensor, leading to AC shutdown and cold air blowing. Cleaning the detector restores the heating process.
  • Clogged Air Filter: Grime, dust, or soot can accumulate inside the air filter, obstructing airflow and causing overheating, which leads to AC shutdown and cold air blowing. Replacing the air filter with a new one resolves this issue.
  • Low Supply of Gas: Insufficient gas supply prevents the AC from generating heat, resulting in the blower producing cold air. This issue requires assistance from an HVAC professional.
  • Clogged Condensate Lines: Some AC units utilize condensate lines for water drainage. If these lines become clogged, water may back up into the system, triggering an overflow kill switch and causing the AC to shut down. Clearing the blockage resolves this problem.
  • Damaged Ductwork: Holes and cracks in the ductwork can let in cold air, even if the AC is functioning correctly. Sealing the ducts effectively solves this issue.
  • Incorrect Thermostat Setting: Setting the thermostat to ON causes the blower to run continuously, even when the AC is not heating, resulting in cold air blowing. Switching the thermostat to AUTO, which activates the blower only during heating cycles, resolves this problem.

Three Flash Error Code

This code indicates insufficient airflow, which may arise from the following causes:

  • Faulty Inducer: The draft inducer motor supplies a steady oxygen flow to the burners during the heating process and removes carbon monoxide through an external vent. When operating correctly, the motor facilitates airflow from the heat exchanger. If no air is flowing, the motor may be faulty, requiring repair or replacement by a professional.
  • Blocked Vent Pipe: A blocked vent pipe prevents the furnace from heating properly. Blockages can occur due to nesting birds, rodents, leaves, debris, soot, rust, or snow. Incomplete combustion and the accumulation of carbon monoxide are potential dangers. Removing blockages and replacing corroded portions of the vent pipe resolve this issue.
  • Damaged Pressure Switch Hose: The pressure switch in the furnace connects to the exhaust vent through a hose, which detects pressure levels. A damaged hose can keep the pressure switch open, preventing the furnace from heating. Replacing the hose or reconnecting a disconnected hose resolves this problem.
  • Faulty Pressure Switch: The pressure switch itself can be faulty, hindering airflow. Dust, dirt, or wear and tear may cause malfunctions. Replacing a damaged pressure switch is recommended, preferably performed by a professional.

22 Flash Error Code

Attempting to reset the AC unit by turning it off and then on may resolve this error. If the issue persists, the ignitor could be the cause. Failure to ignite the flame can result from a dirty or faulty ignitor or sensor. Cleaning the ignitor resolves this issue, and if the ignitor is faulty, it should be replaced.

How Can You Maintain Your AC Unit To Extend Its Lifespan?

American Standard AC Red Light Blinking – What Causes It And How To Resolve The Issue?

You play a vital role in maintaining your AC unit to ensure its longevity. Here are some tips to help you:

  • Turn off the system before inspecting it to avoid injury and further damage.
  • Regularly clean or replace the air filter as per the manufacturer’s recommendations.
  • Keep the area around your AC unit clean to prevent debris accumulation and maintain optimal performance.
  • Schedule a professional inspection of your AC unit before the cold season to address any existing issues promptly and avoid potential costly repairs.

Should You Repair Or Replace Your American Standard AC?

When deciding between repairing or replacing your AC unit, careful consideration is essential. The following factors can guide your decision:

American Standard AC Red Light Blinking – What Causes It And How To Resolve The Issue?
  • If your AC unit is near the end of its lifespan, it may be more cost-effective to replace it.
  • If your system is not performing efficiently, replacement may lead to energy savings, reducing high utility bills.
  • Warranty coverage can play a significant role in the decision. If your warranty covers parts or the entire AC unit, repair costs may be lower. Otherwise, replacement could be a more financially sound option.
  • Consider the return on investment. Assess whether repair costs justify the extended lifespan and improved performance or if replacement offers better long-term value.
  • Frequent breakdowns may indicate that repair costs outweigh the benefits. In such cases, replacement may be the more prudent choice.


A blinking red light on your American Standard AC unit signifies an issue. The number of blinks corresponds to a specific error code, indicating the problem at hand. Taking proper care of your AC unit and carefully considering repair or replacement options are essential steps in resolving AC issues effectively.

American Standard AC Red Light Blinking – What Causes It And How To Resolve The Issue?

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