Error codes for American Standard Furnace

American Standard Furnace is a brand of equipment from HVAC Service America, a division of ABC Supply Company. American Standard Furnace provides products and services that are designed to maintain the efficiency of heating and cooling systems. The company has been around for some time. Since then, it has been selling more and more advanced furnaces every year. Today, it is one of the leading manufacturers of heating and cooling equipment for residential and commercial properties.

The company has designed its furnaces for energy efficiency, safety, and durability. These three features are the reason why the company is known as a leading manufacturer of heating and cooling equipment. It provides an excellent range of products that will help you maintain the performance of your HVAC system without worrying about how to keep it running smoothly.

However, there are often some common issues that homeowners have with their furnaces. These issues can lead to dangerous situations and even expensive repairs. The purpose of this article is to provide a comprehensive guide on how to identify these common issues so that you can be able to solve them quickly and effectively. Let’s check out some of the common problems and their possible solutions.

Circuit Breaker or Fuse

It is possible that either the electrical system that supplies your furnace’s power has been shorted out or that the power switch has blown.

Try resetting the circuit breaker on your furnace. If the hose blows, you must replace it.


It is possible that the furnace’s igniter is cracked or faulty.

Check the ignition part for cracks, and if there are any, then replace the igniter. If it isn’t cracked, you can use a multimeter for continuity test.


It is possible that your thermostat is adjusting incorrectly, causing the furnace to cycle on and off too often.

If your thermostat has a calibration scale that can be adjusted, adjust the heat anticipator. In the event that this does not stabilize the unit, you may need to replace the thermostat.

Blower Motor

It is possible that your blower motor has completely burned out. If this does not happen, then it is possible that the connecting belt has broken.

Test to see if the motor is getting enough power. If it does not, and it isn’t running, the motor has probably failed. If the motor runs but the air doesn’t move, the belt that connects the two ends of the motor is probably broken. You’ll need to replace the belt.

Control Board

On the control board, there is a control knob that regulates the amount of voltage that can be reached by each of the parts. If the relay that controls the blower motor is faulty, it will continue to send voltage to the motor.

Change the control board.


The contact that controls the blower motor on your thermostat might be stuck closed. This will result in the blower motor running continuously.

Use a multimeter to test for the continuity. If it seems that the thermostat is the cause of the problem, you can replace it.

Flame Sensor

The flame sensor on your furnace monitors the burner, detecting whether there is a burning flame or not. If the sensor is defective or dirty, it will not be able to detect flames.

If the sensor is dirty, clean it with a fine pad that is abrasive. If the flame sensor is defective, replace it.

Error Codes

2 Flashes: Because your furnace is dropping the flame, it is likely that it is blowing cold air.

3 Flashes: This indicates that there is a problem with the pressure switch.

4 Flashes: When the switch flashes, it means that there is a problem with the limit switch.

6 Flashes: If this occurs, there is a problem with the polarity or grounding.

7 Flashes: Indicating that there is a problem with the gas valve.

9 Flashes: Indicates that there is a problem with the ignition or the ignitor circuit.

22 Flashes: Those are indicators that something is wrong with the flame itself.

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