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Since 1976

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Since 1976

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Michall Daimion Heating & Air Conditioning, Inc. Blog

This Little Fan Sensor Could Be Causing Your Air Conditioner Big Problems

Your AC kicks to life when it needs to, but then it powers down when it’s no longer needed, lying in wait for the next signal from your thermostat to roar to life. You don’t have to really do anything besides set and forget the temperature, and your air conditioner will work with your thermostat to do the rest.

But there’s this unlikely, yet important air conditioning repair in Chester, PA that you need to be aware of: a small sensor that can cause a lot of havoc.

Let’s Talk About the Blower Motor

Your air conditioner has a blower motor. It’s responsible for pushing air through your ductwork so it actually reaches your vents and disperses into your home. That motor creates the necessary pressure that your ductwork needs and it’s done by the small sensor on your blower motor called a resistor.

As you might imagine, a resistor is something that resists electricity. This is important because the speed of your blower motor not only impacts the flow of air, but the sensor itself can accidentally heat up air before it travels through your ductwork. Let’s explain.

That Sensor Can Overheat

Inside of a resistor, there’s a device called a heat sink. These are commonplace in most small electronics, especially computers and smartphones. Since heat is a byproduct of electricity, and it’s unavoidable, we need somewhere for excess heat to go when an electronic device generates or uses lots of power.

That’s the job of the heat sink, but if that sensor on the blower motor runs into trouble, it can go a little haywire. The result is a sensor that’s not resisting electricity the way it’s supposed to. Your blower motor runs faster than it needs to, and the maximum amount of heat is created in your sensor.

It should go to the heat sink, but even then, the heat sink isn’t magic–it doesn’t sap away all heat and pull it somewhere else entirely. If this sensor overheats and doesn’t resist electricity the way it’s supposed to, excess heat can warm the otherwise cool air in your ductwork before it reaches your vents.

How Do You Know if it’s the Sensor?

It’s an internal piece, so it’s not something you can see from the outside of your air conditioner. If you’re experiencing warm air coming out of your vents, but you’ve made sure your air filter has been changed out, the coils aren’t freezing, and the problem is otherwise baffling you, it may be this sensor. It’s an uncommon issue, but it’s one you may face at least once throughout the lifetime of your air conditioner.

Schedule Repairs ASAP

Any time an electronic overheats, it’s a big enough problem to call in a repair request over. There’s no telling what this could lead to or if it could fry the circuitry going to your blower motor, which is why you should call the moment you experience warm air coming out of an otherwise functional air conditioner.

Contact Michall Daimion Heating & Air Conditioning, Inc. today to schedule your air conditioner repair as soon as possible.

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