Blinking Yellow Light On Furnace
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If you have ever been in a home or building with a furnace, you have likely seen a blinking yellow light on the furnace. This light indicates that the furnace has an issue and is not functioning properly. You may be wondering why the light is blinking and what you should do about the issue. In this article, we will discuss what a blinking yellow light on a furnace means and how to address the issue.
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What Does a Blinking Yellow Light on a Furnace Mean?
A blinking yellow light on a furnace typically indicates that the furnace has a problem with the high limit switch. The high limit switch is a safety device that prevents the furnace from getting too hot and potentially causing a fire. If the limit switch trips, it will shut off the furnace and the yellow light will start flashing. This is a warning for you to not use the furnace until you have addressed the issue.
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What Causes the High Limit Switch to Trip?
There are several potential causes of the high limit switch tripping. The most common cause is due to a clogged air filter. When the air filter becomes clogged with dirt and debris, it can block airflow to the furnace. This prevents the furnace from cooling down and causes the high limit switch to trip. Other potential causes of the high limit switch tripping include a dirty blower wheel, a broken limit switch, and a faulty blower motor.
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How Can You Fix the Blinking Yellow Light?
If the blinking yellow light on your furnace is due to a clogged air filter, you can address the issue yourself. Simply locate the air filter and replace it with a new one. If the problem is more complex, such as a broken limit switch or a faulty blower motor, you will need to call a professional technician to diagnose the issue and make the necessary repairs.
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In addition to replacing the air filter, you may also want to clean the blower wheel and the furnace cabinet. This will help ensure that air can freely flow around the system and enable the furnace to cool down properly. You should also check the electrical connections and wiring to ensure they are secure and in good condition.
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If the blinking yellow light continues even after you have addressed the issue, you should contact a professional technician. A technician can inspect the furnace and determine why the light is still blinking. They can also make the necessary repairs to get your furnace back up and running.
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A blinking yellow light on a furnace is an indication that there is an issue with the high limit switch. The most common cause of this issue is a clogged air filter, but it can also be caused by a dirty blower wheel, a broken limit switch, and a faulty blower motor. You can address this issue yourself by replacing the air filter, cleaning the blower wheel and the furnace cabinet, and checking the electrical connections. If the blinking yellow light continues, you should contact a professional technician to inspect the furnace and make the necessary repairs.
Conclusion
In conclusion, a blinking yellow light on a furnace is a warning that the high limit switch has tripped. The most common cause of this issue is a clogged air filter, but it can also be caused by a dirty blower wheel, a broken limit switch, and a faulty blower motor. You can address the issue yourself by replacing the air filter, cleaning the blower wheel and the furnace cabinet, and checking the electrical connections. If the blinking yellow light continues, you should contact a professional technician to inspect the furnace and make the necessary repairs.
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