Ducane Furnace Codes: What Do They Mean?

Duchane gas furnaces are arguably some of the most reliable, energy-efficient, and user-friendly products on the market today. However, like any other heating system, these units can occasionally experience issues that may need to be addressed by a professional service technician. In the event your Duchane gas furnace begins displaying strange error codes or fails to turn on at the expected times, you may have a problem with the unit — and should contact local HVAC professionals as soon as possible to schedule a repair appointment. In this blog post, we’ll explore some of the most common troubleshooting codes for Duchane gas furnaces — as well as what they signify in each case. If you own a Duchane gas furnace and notice an alert light or unusual noises coming from your unit, this blog post will serve as a helpful resource for learning about potential issues and how to address them before things get worse.

Error Code 1: Blower Motor Circuit Malfunction

The blower motor circuit is responsible for activating the blower on your Duchane gas furnace. In the event your furnace fails to activate the blower motor, it’s likely a result of a short circuit or overloading within the blower motor circuit. If you notice that the blower fails to turn on but the pilot light is lit, this is likely an indication that the blower circuit is overloaded or has a short — and should be addressed as soon as possible. Blower motor circuit malfunctions can result from a variety of things. When the blower motor circuit malfunctions, you may notice that the furnace fails to turn on or generate the expected amount of heat. Additionally, you may also notice that the furnace’s blower motor is not running — and is therefore not blowing any air through the ductwork. If your Duchane gas furnace has a blower motor circuit malfunction, you’ll likely see a blower-motor circuit error code displayed on the unit’s control panel: Blower Motor Circuit Malfunction.

Error Code 2: Damper Actuator Malfunction

The damper actuator is responsible for automatically opening and closing the damper in your furnace’s internal ductwork. In the event the damper actuator on your Duchane gas furnace fails to properly open or close the damper, your furnace won’t be able to draw in the necessary air to burn the fuel inside the furnace. If the furnace isn’t able to draw insufficient air, the furnace won’t be able to produce the necessary heat — and the unit will shut off. You might also notice that the thermostat isn’t able to regulate the temperature in your home and that the furnace’s Blower Motor Circuit Malfunction light remains illuminated. If you suspect a Duchane gas furnace damper actuator malfunction, you’ll likely see a Damper Actuator Malfunction error code displayed on the furnace’s control panel: Damper Actuator Malfunction.

Error Code 3: Furnace Electronic Control Malfunction

The furnace’s electronic control is responsible for automatically regulating the furnace’s temperature, fan speed, and ignition sequence. In the event the furnace’s electronic control malfunctions, the furnace won’t be able to turn on — and won’t generate any heat. If the furnace’s Blower Motor Circuit Malfunction light is illuminated and the furnace isn’t able to turn on, there is a good chance the issue is related to a fault within the electronic control. To resolve the issue, you’ll likely need to have the furnace’s electronic control replaced by a professional HVAC technician. Blower Motor Circuit Malfunction

Error Code 4: Furnace Rotor Shaft Malfunction

The rotor shaft is responsible for rotating the internal fan blades that draw air into the furnace and feed it through the ductwork. If the rotor shaft fails to turn and rotate the fan blades, the furnace won’t be able to draw insufficient air — and won’t be able to generate any heat. If the furnace is turned on but isn’t generating sufficient heat, you may notice that the Blower Motor Circuit Malfunction light remains on. The furnace may also emit a loud noise when it first turns on and does not generate any heat. If you suspect a rotor shaft malfunction, you’ll likely notice a Furnace Rotor Shaft Malfunction error code displayed on the furnace’s control panel: Rotor Shaft Malfunction.

Error Code 5: Furnace Electronic Control Again

If the furnace’s electronic control malfunctions, it may not be able to recognize certain conditions — and shut down until the issue is resolved. If the furnace’s control again kicks in and begins the ignition sequence again, it may be an indication that the furnace’s control has reset itself and is once again recognizing the environment. If the furnace’s Blower Motor Circuit Malfunction light is on, and after a few moments the furnace begins to turn on again, it may be an indication that the furnace’s electronic control has reset itself. When this occurs, you may see a Furnace Electronic Control Again error code displayed on the furnace’s control panel: Furnace Electronic Control Again.

Error Code 6: Electronic Air Drain Valve (EADV) Malfunction

The electronic air drain valve (EADV) is a component that’s responsible for automatically draining water away from the furnace’s internal components. In the event the EADV malfunctions, the valve may fail to open and drain away water. Without the EADV fully open, the water may begin to accumulate and flow into the furnace’s internal components. If you notice that the furnace’s Blower Motor Circuit Malfunction light is on and water is pooling at the bottom of the furnace, you may have an EADV malfunction. If you suspect an EADV malfunction, you’ll likely see an Electronic Air Drain Valve (EADV) Malfunction error code displayed on the furnace’s control panel: Electronic Air Drain Valve (EADV) Malfunction.

Error Code 7: Electronic Air Change Device (EACD) Malfunction

The electronic air change device (EACD) is a component that’s responsible for regulating the amount of air that flows into and out of the furnace’s internal ductwork. If the EACD malfunctions, it may not be able to properly open and close the ductwork and regulate the flow of air within the furnace. If you notice that the furnace is not generating any heat, you may notice that the Blower Motor Circuit Malfunction light is on and that water is pooling at the bottom of the furnace. If you suspect an EACD malfunction, you’ll likely see an Electronic Air Change Device (EACD) Malfunction error code displayed on the furnace’s control panel: Electronic Air Change Device (EACD) Malfunction.

Conclusion

Many different things can go wrong with a gas furnace, but fortunately, Duchane makes high-quality products that are easy to troubleshoot. If you notice that your furnace is showing any of the above codes, you should call a professional to come out and look at the issue as soon as possible. The longer you wait to address the issue, the more likely it is to become more serious and require a more extensive repair. Having your furnace checked out and fixed by a professional technician will ensure that your furnace is safe and efficient and will help extend the life of your home’s heating system.