Resistor or switch problem? blower motor works only on speeds 1, 2, & 4, but not 3

[Paul Anton]

I'm looking for help determining what part I need. I have a 2001 Sport trac with manual climate control. The blower switch works in positions 1, 2, & 4. The fan operates in position 3, but only at the speed from position 2.



Is this a resistor or switch problem?



Thanks!

 

[Todd Z]

i bet its the resistor block....



Todd Z

 

[Vic Sorlie]

Your problem could be similar to the blower controller failure I had on my 07 Gen 2 truck (electronic HVAC). You'll find my DIY posted in the Projects section. It's an easy fix - look at the schematic and you should be able to identify the part.

 

[EddieS'04]

On a gen 1. Best place to start, is the resistor block. On the fan wiring.

 

[Paul Anton]

I am gathering from the prior posts that the resistor block in a generation 1 model is behind the glove box, and not in the engine compartment. Is this correct?

 

[TRACket Paul]

The resistor is in the engine compartment next to the blower motor.

 

[henry tanner]

it is the resistor. i had to replace that and the switch. i had the same problem.

good luck

 

[Ken Hibbs]

Vic, is the resistor location the same on the non electronic fan control?

 

[Richard L]

I am 99.99% sure it's the resistor block. I have never encountered any vehicle with missing one or more fan speeds that was not caused by a bad resistor block. That should be the first thing to check.



...Rich

 

[Vic Sorlie]

Betcha it's the blower resistor. Check YouTube video. Simple repair.