Error codes for Armstrong Furnace

As a manufacturer of furnaces, Armstrong Electric Company or Armstrong Air is a company that has been in the industry for some time. The company has a long history of providing great products and services to its customers. Since its establishment, Armstrong has been creating and designing a variety of products that will provide you with the best services and performance.

The company has a wide range of products, including furnaces, air conditioners, heat pumps, and more. The company is known for providing a wide range of products that will help you maintain the performance of your HVAC system without worrying about how to keep it running smoothly. The company has also developed many energy-efficient models that are ideal for energy-conscious homes. The company is also committed to creating superior products that will help you maintain the comfort level in your home or office.

However, there are also some common issues that homeowners have with their Armstrong 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.

Tech Support 24/7
Ask a Tech Specialist Online

Connect with the Expert via email, text or phone. Include photos, documents, and more. Get step-by-step instructions from verified Tech Support Specialists.

Circuit Breakers and Fuse

Most likely, either the electrical system that powers your furnace has become short or the power switch has blown. Try resetting the circuit breaker on your furnace. If the valve blows, you will need to replace it.


The fire furnace’s igniter might either be cracked or faulty.

Check for cracks and if there are any, replace the igniter. If it is not cracked, then use a multimeter to test for continuity.


There is a possibility that your thermostat is adjusting incorrectly, causing the furnace to cycle on and off too often. If your thermostat has a calibrated scale that is adjustable, adjust the heat anticipator. If this does not cause the temperature to rise and stabilize the unit, it is possible that you will have to replace the thermostat.

Tech Support 24/7
Ask a Tech Specialist Online

Connect with the Expert via email, text or phone. Include photos, documents, and more. Get step-by-step instructions from verified Tech Support Specialists.

Blower Motor

There is a possibility that your blower motor has completely burned out. If that is not the case, the connection belt may have just broken.

Check to see if the motor is producing power. If it doesn’t, but it is still not running, then the motor has probably failed. If the motor runs, but the air doesn’t move, it is probable that the connecting belt is broken. You will also need to replace the belt.

Control Board

It is on the control board that regulates the amount of voltage that will reach all the parts that are used. When the relay that controls the blower motor is failing, it will continue to send voltage to the motor. Then, replace the controller.


If that contact is stuck closed, the blower motor on your thermostat may continue running continuously. You can check continuity using a multimeter. If it appears that the thermostat is the cause of the problem, you should replace it.

Flame Sensor

The flame sensor on your furnace monitors the burner, detecting if there is a flame. If the object in question is defective or dirty, it will not be able to detect a flame. If the sensor is dirty, clean it with a finely abrasive pad. If your flame sensor is faulty, replace it.

Error Codes


It was not possible to turn on the device, and there were no hardware faults that were detected.


That is, it is now normal operation.

CODE: 1 Flash

Flammable and with a gas valve on.

CODE: 2 Flashes

The pressure switch was closed and the inducer was turned off.

CODE: 3 Flashes

There is a pressure switch open, and there is an inducer on.

CODE: 4 Flashes

Switch to the high limit is open.

(Visited 73 times, 1 visits today)


  • No comments yet.
  • Add a comment