Blower only works on high

[reelizmpro]

My blower only works on high as well and I have a resistor on the way since that seemed to be the consensus $27 from autohausaz). I believe there are 4 contacts which I assume to be one for each speed so you would think corrosion would cause a variety of working\non-working speeds rather than just the "4th only".

Good suggestion to check the brushes and contacts of course.

Why do u think there is a resistor pack in the first place? Think about it. Max speed is straight through, no resistance because its just ON. A new board will solve your problem but it woulda been a simple fix. Corrosion wasn't a good term, its more like oxidation.

[jeffnhiscars]

What was the part # for the resistor you ordered?

64111468521

IIRC its "OEM Behr"

[idickers]

My blower only works on high as well and I have a resistor on the way since that seemed to be the consensus $27 from autohausaz).

What was the part # for the resistor you ordered?

[jeffnhiscars]

My blower only works on high as well and I have a resistor on the way since that seemed to be the consensus $27 from autohausaz). I believe there are 4 contacts which I assume to be one for each speed so you would think corrosion would cause a variety of working\non-working speeds rather than just the "4th only".

Good suggestion to check the brushes and contacts of course.

[oldmann]

I haven't worked on this resistor pack before. Can I see it after I remove the plastic housing from the engine bay, with the blower squirrel cage still installed?

Plastic cover and wiring out of the way, Then the metal cover over the blower itself can come off, the resistor coils are just inside, the motor plugs into the resistors. PITA but while your in there replace the blower too, you don't want to do this again.

[idickers]

if the motor brushes are worn it will work intermitently and probably make some noises before stop working altogether. The resistor pack is not a resistor at all but a set of solid state coils that have different resistances. They don't go bad per se, but the contacts where it meets the blower fan often corrodes and needs a good cleaning or resurfacing.

I haven't worked on this resistor pack before. Can I see it after I remove the plastic housing from the engine bay, with the blower squirrel cage still installed?

[reelizmpro]

if the motor brushes are worn it will work intermitently and probably make some noises before stop working altogether. The resistor pack is not a resistor at all but a set of solid state coils that have different resistances. They don't go bad per se, but the contacts where it meets the blower fan often corrodes and needs a good cleaning or resurfacing.

[jeffnhiscars]

2 kinds Ian Magna and a bosch Magna has fixed wires Bosch doesnt

Those sound like the aux fan resistors whereas the OP needs one for the HVAC blower

[idickers]

When this happened to me, it ended up being the brushes in the blower motor wearing out and not the resistor.

Would bad brushes cause the motor to run only on the high setting? I would have thought the brushes would have affected all speeds.

[E30Gus]

When this happened to me, it ended up being the brushes in the blower motor wearing out and not the resistor.

[fronton]

If I had an M20 I wouldn't need to pull the engine. My "problem" is that I have an s38 and its a little less accommodating against the firewall. Note sig. These are first world problems.

[Jean]

Yeah, no need to pull the engine. If anything, some pull the intake manifold to do the blower fan and/or wiper hardware

[Wh33lhop]

Just buy an S50 so it will be worth pulling the engine.

(you shouldn't have to pull the engine, it will take some finagling)

[fronton]

ha, dash will be easier than pulling the engine!

[Jean]

Is there a way to get at the resistor pack without accessing the box from the engine bay?

no . unless you want to pull the dash, and pull the blower/ac box inside the car