Coleman Furnace Error Code 4 and What It Means

When you run a furnace, it is essential that it functions properly at all times. Any time there’s an issue with the furnace, it can be concerning. However, most of the time this simply means that the sensor has detected a problem and needs adjustment in order to operate smoothly again. Fortunately, most furnaces have a diagnostic feature that will alert you to any potential issues and what code has been triggered. This allows you to make any necessary adjustments as soon as possible to avoid further problems in the future and save on repair costs. The diagnostic codes are also a great resource for professionals who may need to troubleshoot problems with your furnace at some point in time. If you ever encounter an issue with your furnace, check below for common error codes related to a Coleman Furnace and their meanings:

Error Code 4

The first thing to understand about error code 4 is that it can be triggered in several different situations. There are two primary reasons that error code 4 is triggered and they are failsafe/thermostat malfunction and electronic air cleaner (EAC) failure. As you can see, both of these issues can be serious and quickly escalate into something more serious. You should always address a furnace error code 4 as soon as you are aware of it, especially if it is the EAC error.

What does error code 4 mean?

The EAC error, which is associated with error code 4, signals that there is a problem with the electronic air cleaner. While the EAC is helpful for cleaning the air in your home, it can also cause problems for the furnace if it is not working properly. The EAC filter can become clogged with dust and other particles that are in the air. When this happens, the air being circulated throughout your home will not be clean and healthy. However, this is not the only reason that the EAC could be malfunctioning. To be sure that the EAC filter is not the issue, you can simply replace the filter or clean it. If the problem persists, then the EAC may need to be replaced.

Failsafe/Thermostat Malfunction

Failsafe/Thermostat Malfunction is another common reason for the error code 4. There are a number of different sensors that are located throughout your furnace. These are meant to protect the furnace from overheating, but sometimes they may trigger when there is no actual malfunction occurring. When this happens, the sensor will send a signal to the thermostat to shut down the furnace. This is a failsafe feature that is designed to protect the furnace from being damaged. There are two primary sensors that are associated with error code 4: temperature sensor and pressure sensor. The pressure sensor is designed to sense when there isn’t enough pressure in the system and tells the thermostat to shut down the furnace. The temperature sensor will trigger the furnace to shut down if the temperature inside the furnace is too high.

Electronic Air Cleaner (EAC) Failure

As mentioned above, EAC failure is another frequent reason for error code 4. In this case, the furnace will trigger error code 4 when the EAC is not working properly. However, this is not the only time that error code 4 will appear. As you can see from the list above, EAC failure can also trigger error code 4 when there is an issue with the filter. When this happens, the furnace will shut down, which will shut off the airflow to your home. When you run a furnace, the airflow should be consistent. If you notice that there are times when the flow of air stops, you may have an issue with the filter.

Electronic Air Flow and Performance (EAF) Failure

The next error code 4 failure is an EAF failure, which is triggered by an issue with the system that controls the fan. The fan is designed to pull air through your furnace and circulate it throughout your home. When there is a problem with the fan system, the airflow in your home can be disrupted and cause damage to your home. The most common reason for an EAF failure is a clogged filter. As with the EAC filter, the fan filter can become clogged with dust and other particles in the air. When this happens, the fan system is unable to work properly and will trigger error code 4.

Electronic Controls Failure

The last reason for error code 4 is an electronic control failure. The controls are responsible for running the furnace, as well as monitoring the sensors and other features. When the control system malfunctions, it can trigger error code 4. As you can see, the reasons for error code 4 are varied. An error code 4 can be triggered by a variety of different issues. Regardless of what triggered it, you should always make sure to address the issue as soon as possible. Doing so can help you avoid a more serious problem and save on repair costs.

Conclusion

Furnaces are important fixtures in a home, as they keep the occupants warm and safe during the cold months. However, they can malfunction at any time, which can lead to a significant drop in temperature. If you ever notice that the furnace appears to be malfunctioning, it is important to troubleshoot the problem as soon as possible. If you ever encounter an issue with your furnace, check below for common error codes related to a Coleman Furnace and their meanings. With this information, you will be able to properly troubleshoot the problem and address any issues as soon as possible.