Heater/AC blower motor, problem solving tips! (For motor with auto climate control)

[mattferguson14]

I am running into all of these exact issues. Low air flow (or so it seems in comparison to other vehicles), the fact that it always sets itself to Auto mode, everything. I have been noticing that when i turn on the a/c there is a noticeable loss of engine performance, which is normal when the compressor comes on, but this is excessive. Are you saying that the blower motor could be the cause of all of these problems??

[tysamigo]

Where can I get a Blower Resistor?

[Jayd-S]

Where can I get a Blower Resistor?

Hi Tysamigo,

I did not replace the blower motor resistor but I see that Parts Geek carries one and there appears to be one in stock for $59.63 at:

http://www.partsgeek.com/catalog/199..._resistor.html

O'Reilly Auto Parts list a compatible resistor for the Isuzu Vehicross Base model for $56.99 although they don't show any in stock at the moment. It's a Murray Climate Control Resistor Block, at this link here:

http://www.oreillyauto.com/site/c/de...2627&ppt=C0328

Again, because I did not pull the resistor, I don't know exactly what it looks like. There is likely a difference between the VX base model without climate control and the VX with climate control. I saw one climate control resistor on eBay but it is very pricey at $178.13!

http://www.ebay.com/itm/HVAC-Blower-...-/171707974458

If anyone else wants to throw in any recommendations here and perhaps photos of the two different resistors, it might be a good thread to keep all of the information together?

Good luck!

[tysamigo]

Yeah.. I have climate control (2001)...

Am I stuck with the pricey guy??

[mattferguson14]

Yeah.. I have climate control (2001)...

Am I stuck with the pricey guy??

Found the same resistor here for $50 less.. Still searching for better deals too. Google key word "resistor RU-592"

http://www.carpartkings.com/standard...or-ru-592.html

[tysamigo]

OK, but before I grab one...

How do you test the resistor to see if it's good/bad? I have everything taken apart and there are 3 prongs in front of me... what do I do now?

[Jayd-S]

OK, but before I grab one...

How do you test the resistor to see if it's good/bad? I have everything taken apart and there are 3 prongs in front of me... what do I do now?

Hi Tysamigo,

What problem were you having with the blower before? Did the motor not work at certain speed settings, if so, which ones? Or did it not work at all. If you follow the wiring diagram in the original post, it should help you to troubleshoot.

With a test light, check for power at each point along that circuit.

As you have the blower resistor out, make sure it is disconnected from the battery, then use an ohmmeter with one lead on the terminal that had the Blue/Black wire attached, then touch the other lead to each of the other terminals. If the resistors are OK, you will have a reading at each terminal with a different resistance at each one.

Hope this helps.

[Jayd-S]

I am running into all of these exact issues. Low air flow (or so it seems in comparison to other vehicles), the fact that it always sets itself to Auto mode, everything. I have been noticing that when i turn on the a/c there is a noticeable loss of engine performance, which is normal when the compressor comes on, but this is excessive. Are you saying that the blower motor could be the cause of all of these problems??

Hi Matt.

It certainly sounds like the same symptoms. It will take you less than one minute to drop the blower motor out of its housing. Just four screws hold it in place. No need to remove the glove box. If you can contort yourself upside down on the passenger side, you will see the familiar shape of the blower motor close to the door pillar, behind the glove box and the four screws holding it in place. Once you have located the screws, you can uncontort yourself to remove them!

The motor has a foam gasket so you'll need to give it a nudge to ease it free. No need to disconnect the wiring. Just rotate the fan to see if it is hard to turn. The new motor has slight resistance but give it a hard spin from the outside of the cage and it will continue to turn for two seconds. If you have a bearing problem, it will be tough to turn and there's no way it will continue to spin after you let go.

As you can see in the photos in the original post, the fan cage was pretty dirty. I am sure that added to the decreased air flow and probably added to the noise factor too.

Good luck!

[mattferguson14]

Hi Matt.

It certainly sounds like the same symptoms. It will take you less than one minute to drop the blower motor out of its housing. Just four screws hold it in place. No need to remove the glove box. If you can contort yourself upside down on the passenger side, you will see the familiar shape of the blower motor close to the door pillar, behind the glove box and the four screws holding it in place. Once you have located the screws, you can uncontort yourself to remove them!

The motor has a foam gasket so you'll need to give it a nudge to ease it free. No need to disconnect the wiring. Just rotate the fan to see if it is hard to turn. The new motor has slight resistance but give it a hard spin from the outside of the cage and it will continue to turn for two seconds. If you have a bearing problem, it will be tough to turn and there's no way it will continue to spin after you let go.

As you can see in the photos in the original post, the fan cage was pretty dirty. I am sure that added to the decreased air flow and probably added to the noise factor too.

Good luck!

Thanks! I'll check it out!