Why does the fan only run on the highest setting?
Most commonly the fan will only run on the highest setting. This is a well documented problem, and is caused by a failing blower motor resistor. Correcting the problem is straight forward, and requires replacement of the small resistor.
Why does my AC fan only work on high?
If your speed selector for your AC or Heat only works on high, or low, or if its missing any particular speed, this video will show you how to fix it once and for all. This is a fix for 2nd generation Dodge Rams (1994-2001-2002 2500/3500) Loading…
What happens if the blower motor only works on high speed?
In other designs, the failure of 1 resistor means you lose only one speed. However, most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode.
Why does my air conditioning run at only one speed?
But what happens when you get in and discover you’ve left the air conditioning on the lowest possible speed setting, rendering it practically useless? Or when you set foot inside your car on a moderately hot day only to discover that the A/C blasts you with the max amount of cold air — air so frigid you don’t need it but can’t turn it down?
What happens when the a / C fan is on the highest setting?
When the a/c fan is on any setting other than the highest setting the air comes out cold. When the fan is set to the highest setting, it only comes out warm. This happens regardless of a/c or max a/c setting, regardless …
How is the speed of the blower motor controlled?
The blower resistor is connected in series to the blower fan motor. This means that the current running through the blower motor, and its’ speed is therefore controlled by the resistor value. The user chooses a fan speed by selecting a speed which then connects one of the resistors in the blower resistor pack.
Why does my blower only work on high speed?
If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode. To repair the problem, simply replace the resistor block.
Why does the air come out cold when the a / C is on?
A/C is cold until the fan is on high, then it’s warm. When the a/c fan is on any setting other than the highest setting the air comes out cold. When the fan is set to the highest setting, it only comes out warm. This happens regardless of a/c or max a/c setting, regardless of fresh or recirculated air, and regardless of car speed.