Furnace Sensor Error: What to Do When Your Furnace Goes into Code Yellow

Most furnaces have an error code system built into them. These codes are designed to alert you when something is wrong with your furnace so that you can call a repair person if necessary and take action to remedy the problem as soon as possible. A furnace sensor error is one of the most common types of errors that a furnace can experience. There are several different kinds of sensors in a furnace, each with its own function and purpose. If any one of these sensors detects an unusual condition, it will trigger a code so that you know what needs to be fixed. Read on to learn more about sensor error codes in your furnace and what to do if they happen.

What Does a Furnace Sensor Error Code Mean?

All sensor errors mean that the sensor of that type is giving an error reading. The furnace will trigger a code for the sensor type and for a specific code number. Each type of sensor has its own code number, which will be displayed on the error code panel as a red light. A sensor error can mean that there is a problem with the sensor itself or that there is a problem with the wiring to the sensor. It can also mean that there is a problem with the sensor’s connection to the control board in the furnace.

Why Does a Furnace Go Into Code Yellow?

A furnace will go into code yellow any time a sensor error occurs. There are several different sensors in a furnace, each responsible for a different function. A dirty or clogged filter, or a bad temperature sensor, can trigger a sensor error code. You will notice that the furnace will continue to operate, but that the blower will be on a lower setting. A sensor error can be caused by many different problems. It is important to identify the problem as soon as possible so that you can fix it. In some cases, you will need to call a technician to come out and make the repairs.

Furnace Out of Or Out of Range Sensor Error

If a sensor indicates that the furnace is outside its acceptable range, the furnace will go into a code yellow. The sensor range error can be triggered by many different sensors. If the temperature sensor is outside the acceptable range, the furnace will trigger a sensor range error. The same is true if the pressure sensor, humidity sensor, or flow sensor are out of range. When a furnace sensor is out of range, there is a problem with the sensor itself or with the wiring to the sensor. You will need to call a technician to repair this problem. A sensor range error can be caused by many different problems. It is important to identify the problem as soon as possible so that you can fix it. In some cases, you will need to call a technician to come out and make the repairs.

Furnace Dirty or clogged filter error

A dirty filter or clogged filter can be a problem for several different furnace sensors. When the filter is dirty, it interferes with the flow sensor. When it is clogged, it interferes with the pressure sensor. In both cases, the furnace sensor will trigger a code yellow. When the filter is clogged, it is important to change the filter as soon as possible. If the filter is very dirty, it is also a good idea to change it. When a furnace sensor error is triggered by a dirty or clogged filter, you will need to change the filter before the error code will reset.

Evaporator Sensor Error

The evaporator sensor is responsible for measuring the temperature inside the furnace. It is connected to the blower. When the furnace is running, the evaporator sensor is cooled by the air being blown through it. When the temperature inside the furnace is too high, the evaporator sensor will trigger a sensor error code. When the evaporator sensor is too hot, there is probably a problem with the furnace itself or a problem with the wiring to the sensor. You will need to call a technician to repair this problem.

Furnace Temperature Sensor Error

The temperature sensor is used to determine what temperature the thermostat is set for. It is also used to measure the temperature inside the furnace as the furnace is running. When the temperature inside the furnace is too high, the temperature sensor will trigger a sensor error code. When the temperature within the furnace is too high, there is probably a problem with the furnace itself or a problem with the wiring to the sensor. You will need to call a technician to repair this problem.

Conclusion

Furnace sensor errors can happen for a variety of reasons, but luckily, they are easy to resolve. In most cases, a sensor error is simply a result of a clogged filter or dirty sensors, so it’s important to keep an eye on your furnace and have the parts cleaned or replaced as needed. When your furnace goes into code yellow, it’s important to know what the sensor error is and what needs to be fixed. Fortunately, most sensor error codes are pretty straightforward, so you should have a good idea of what needs to be done to fix the problem.