As the cold season approaches, the thought of waking up to a cold house due to a malfunctioning furnace can be quite alarming. However, a dirty flame sensor can contribute to this type of problem. A dirty flame sensor can cause the furnace to stop working efficiently, and if not addressed promptly, it can lead to costly repairs. In this blog post, we will examine the importance of the flame sensor, signs that indicate it is dirty, and the steps to take when it needs cleaning.
WHAT IS A FURNACE FLAME SENSOR?
The flame sensor in your furnace is a critical component that determines whether fuel for ignition should continue to flow. It confirms the presence of a flame by sending signals to the furnace control board. In the absence of a flame, the furnace will shut off, which can cause problems such as erratic cycling, low heat output, or complete failure. Therefore, it is important to keep the flame sensor clean at all times.
One of the common signs of a dirty flame sensor is when the furnace starts to shut off spontaneously, even during operation. The furnace will attempt to restart in a sequence, but will eventually shut down if the issue is not fixed. If you notice these issues, then it’s time to check the flame sensor.
The flame sensor can get dirty, especially if the furnace has not been serviced for some time. Dust, debris, and soot can accumulate on the sensor, preventing it from detecting the flame. If you suspect that it’s dirty, turn off the furnace and allow it to cool down. Remove the sensor, which is usually located near the ignition assembly. Use a soft cloth or fine-grit sandpaper to clean the sensor gently.
After cleaning the flame sensor, reinsert it, and turn on the furnace. Observe and listen to the operation to ensure that the furnace is functioning correctly. If the furnace continues to experience problems, then it’s advisable to contact a heating technician. A professional will diagnose the issues and recommend the best course of action.
In summary, a dirty flame sensor can cause numerous issues with your furnace, which can lead to costly repairs. It’s important to keep the flame sensor clean at all times to ensure that the furnace is operating efficiently. Keeping an eye out for signs such as erratic cycling or low heat output will give you an indication of when the sensor needs to be cleaned. Remember, if you’re unsure or cannot complete the cleaning process, consult with a professional for expert assistance. By taking care of your furnace and its flame sensor, you can ensure that your home stays warm and comfortable throughout the winter season.
