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If your ac blower motor only works on high speed, a faulty blower motor resistor is likely the cause Replacing the blower motor resistor or checking the electrical components often resolves the problem. This component controls fan speed

If it fails, the system runs the blower motor on high only This issue can also be caused by a faulty fuse, relay, or wiring within the hvac system Check the resistor and blower motor for issues, as both may need replacement to maintain proper performance

To troubleshoot this issue, first, inspect the vehicle’s fuse related to the blower.

Another thing to think about is if the blower resistor keeps failing repeatedly All the current for the blower motor goes through the resistor If the blower motor starts to get shorted/ partially shorted then it draws more and more current (amps) to perform the same amount of work. Does your blower motor/fan only run on high speed.or not at all

In this video, we talk about the cause and effect that leads to blower motor resistor failure. The blower on my 2016 trax works fine on speeds 1, 2, and 3, but stops completely whenever 4 (high) is selected I found a wiring diagram online If it's correct, the three lower speeds go through the resistor (from the forums i've read, apparently a common failure) but the highest speed doesn't.

Does your air conditioner only work on high

This common issue means the part that controls fan speed is likely broken It usually points to a fault in the blower motor resistor or, in newer systems, a blower motor control module This problem means the fan speed selector switch cannot tell the fan to run slower, so it defaults to the highest setting where it gets full power, or the part that. A loose blower motor connection or faulty blower motor relay could cause your heat and ac to intermittently work on the highest setting

How do i fix my heat and ac if it only works on high? When a blower motor only works on high speed, it usually indicates a problem with the blower motor resistor, which controls the fan speeds

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