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04-04-2011
AC / Heater Blower Fan only works on one speed. Not sure the type of unit i have but its got dual zone controls. The fan can be set to off and 1-5 setings. The fan only turns on at setting number five. So its either full blast or off. As it was dieing settings 1 and 2 didnt work, then 3 went out then 4. Its starting to get hot in florida so need to fix this before 5 goes out.
Any Ideas what it is??? thanks in advance.
04-04-2011
more than likely its the blower motor resistor, that controls speeds 1-4 at 5 its bypassed to a fuse. its directly behind the blower itself.
04-04-2011
Its not part of the blower is it, or can I replace just the resistor. And where would I get one? ThanksOriginally Posted by pacothetaco
04-04-2011
no its not part of the blower. it just happens to be right next to it squeezed up against the firewall. as long as you dont have the automatic temperature control the resistor is like 30 bucks at autozone.
04-04-2011
Not sure if i have auto temp. If it is what i think it is i dont think i do, its all manual controls (knobs and levers).
Thanks!!!
04-05-2011
Regardless of manual or auto temp, they both have resistors. The speed control is little more than a 12V source with four speeds. 12V/full current is full speed, and then three progressively higher resistance circuits @ lower current resulting in slower fan speeds.
You can tell you have a bad resistor when only the high speed works as this is the only circuit unaffected by its presence.
The resistors are kind of a wear item as they're basically electrical ballasts - they take current meant for the blower motor and bleed it off as heat. These heat cycles will eventually kill the resistor and open its circuit.
04-08-2011
Can u link the part from an auto sight so that I know what it looks like I have the same problem
04-13-2011
05-08-2011
Mine does the same thing except my DRLs turn off when I attempt to turn on the AC blower haha I'm hoping this repair will fix this issue aswell
05-14-2011
did you put the resistor in and did it take care of your drl's problem..
I replaced mine about 3 weeks ago it worked great but now its back to oinly high speed anyone have any other ideas
05-14-2011
If you are having that issue in combination with the issue with the drl's, it is likely the ignition switch.
05-24-2011
This fixed it!!! Thanks Paco
What a pain to reach. If anyone else has to do this I recomend taking out the glove box and blower fan to reach it better. 3 screws on the blower and about 5-6 on the glove box and out they come right out . When removing the resistor all you have to do is take out the front screw and then slide it out because no way can you reach the back screws. Took me 10 minutes to figure that out.
05-24-2011
could either be resistor pack or the fan ignition switch, mine did the same thing and it was the ignition switch.
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