'96 Caravan blower issue

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I have a '96 Caravan, when we turn on the heater (this just started, not sure if it's doing this with AC yet), it will only blow if it's turned full
blast on the blower. All or nothing. I was told that this may have something to do with the cold (it's been fairly bitter cold here the last couple weeks, temps in the teens), but I'm not completely satisfied with this explanation. Any ideas?
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snipped-for-privacy@email.com wrote:

You need a new blower motor resistor.
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wrote:

I concur, that's a distinctive failure mode that's a dead giveaway...
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And if you replace it and it goes out again you need a new blower motor.
Larry
wrote: : : > I have a '96 Caravan, when we turn on the heater (this just started, not : > sure if it's doing this with AC yet), it will only blow if it's turned full : > blast on the blower. All or nothing. I was told that this may have something : > to do with the cold (it's been fairly bitter cold here the last couple : > weeks, temps in the teens), but I'm not completely satisfied with this : > explanation. Any ideas? : : You need a new blower motor resistor.
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Failed blower motors tend to not work well at high speed. Not what the OP described.
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wrote:

Think.
What Max is saying is the thing that can croak the resistor module is a failing blower motor. For instance, if one of the armature windings is shorted...
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I don't think Max said that.
I do think the part number for that resistor has superseded something like 6 times since it was introduced.
I think it's because they're shit to begin with.
I think that if there were a problem with shorted windings, the switch would be the pattern failure (it's not)
I think I install about four of these a month.
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wrote:

Really? Then what do *you* think he meant when he said:
"And if you replace it and it goes out again you need a new blower motor." ??
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I *think* he meant wait and see if the resistor fails again before you waste $200 on a new blower motor considering that the original resistors tend to be failure prone.
Still don't see anything like; the thing that can croak the resistor module is a failing blower motor. For instance, if one of the armature windings is shorted...
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wrote:

Ok, you have a reading comprehension problem. Sorry...
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No, I just don't see things that aren't there.
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wrote:

It was right there in front of your face, son. Still is...
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Nope. Don't see where Max used the words "croak", "resistor module", "for instance", "armature", "shorted".
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In my Intrepid, the blower worked on high only. Replaced the resistor and got one day out of it. Blower worked on high only. Replaced blower motor assembly and resistor and it's been working great ever since. Bearings were going bad.
Larry
wrote: : : > And if you replace it and it goes out again you need a new blower motor. : > : > Larry : : Failed blower motors tend to not work well at high speed. : Not what the OP described.
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I'll keep that in mind if a 96 Caravan ever morphs into an Intrepid.
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And what does that have to do with bearings freezing up?
Larry
wrote: : : > In my Intrepid, the blower worked on high only. Replaced the resistor and : > got one day out of it. Blower worked on high only. Replaced blower motor : > assembly and resistor and it's been working great ever since. Bearings were : > going bad. : > : > Larry : : I'll keep that in mind if a 96 Caravan ever morphs into an : Intrepid.
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wrote:

No worries - he clearly has comprehension issues that nobody here is going to solve for him...
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You two crack me up.
Since Larry had a car that had worn blower motor bearings, all blower problems -must- be identical and related to worn motor bearings. Larry now claims that the bearings in the blower motor froze up. One would *think* (there's that word again) that "freezing up" bearings would manifest themselves as reduced blower speed on high setting.
Gaytripper, I didn't disagree with what Max said, on the other hand, Max didn't exactly condemn the blower motor from the get go, and for very good reason.
Obviously neither one of you is a professional so shotgunning every possible related part at the problem is part and parcel.
I also strongly suspect neither one of you or the OP have the necessary equipment to determine the health of the blower motor and as such, the appropriate action for the OP is to replace the blower resistor.
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Well, obviously you missed all the points being made. And as far as being a professional? Went to school for it (MoTech, know who they were?). I may be "old school" and I don't do it for a living anymore, but mechanical principles are still the same. Bearings start getting "stiff" (freezing up), motor starts drawing more current. That burns out that little electrical component on the resistor block (if you've ever looked at one, you would know what it is). "In my Intrepid..." was an "EXAMPLE" of "MY" experience. Considering, when it first went out, I asked about it here, and Glenn and Bill told me what it was. When it went out again, I used correct troubleshooting techniques to determine why the resistor was going out.
Larry
wrote: : > >: : > >: > In my Intrepid, the blower worked on high only. Replaced the resistor : > >: > and got one day out of it. Blower worked on high only. Replaced blower : > >: > motor assembly and resistor and it's been working great ever since. : > >: > Bearings : > >:> were going bad. : > >: > : > >: > Larry : > >: : > >: I'll keep that in mind if a 96 Caravan ever morphs into an : > >: Intrepid. : > > : > >And what does that have to do with bearings freezing up? : > > : > >Larry : > : > No worries - he clearly has comprehension issues that nobody here is going to : > solve for him... : : You two crack me up. : : Since Larry had a car that had worn blower motor bearings, all : blower problems -must- be identical and related to worn motor : bearings. : Larry now claims that the bearings in the blower motor froze up. : One would *think* (there's that word again) that "freezing up" : bearings would manifest themselves as reduced blower speed on : high setting. : : Gaytripper, I didn't disagree with what Max said, on the other : hand, Max didn't exactly condemn the blower motor from the get : go, and for very good reason. : : Obviously neither one of you is a professional so shotgunning : every possible related part at the problem is part and parcel. : : I also strongly suspect neither one of you or the OP have the : necessary equipment to determine the health of the blower motor : and as such, the appropriate action for the OP is to replace the : blower resistor.
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Nope, didn't miss any points being made. Didn't miss any invented statement either.

Were? As in no longer?

"Don't do it for a living anymore." The reasons are obvious.

Do ya *think* the motor slows down during these events? Didn't MoTech teach you to use your ears? As for the using more current... Didn't MoTech teach you to use an amp meter?

It's a thermal limiter and now *you* know what it is also. I would also point out that the thermal limiter is not used in all models or in all years, it may eventually become part of the component in an upgrade of the part, it may be deleted in an upgrade of the part.

And you felt compelled to tell a story about it even though your second generation Intrepid has little in common with a 96 Caravan.
Yes Larry, sometimes the blower motor causes the resistor failure, like in 1 out of 25 resistor failures. The fact that the part number has superseded so many times bears this out.

For someone who attended Motech, you sure need a lot of outside help.
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