Blower motor resistor?

[johnsma22]

My blower motor remains on high no matter what posistion the fan speed is set to. After doing some reading it sounds like it could be the blower motor resistor. Can anyone confirm this? I have been able to locate the part online for about $40. The problem is, where the heck is it located in my Armada? Any help would be greatly appreciated.

John

[Pops]

Welcome to the Club!!!

Hopefully, someone will have the answer soon.

[scr38]

I don't think the resistor is the problem. If you have a resistor failure some or all of the lower fan speeds would be affected, but not high. On high the resistor is not in the circuit, it is bypassed. If your blower is on high all the time, no matter which speed setting, then the problem is probably in the front A/C control unit. If something shorted across the entire resistor it could cause the blower to be on high all the time, but that is very unlikely.
Attached is a drawing of the A/C inside unit. You can see the location of the resistor. The service manual states that the unit must be removed to get to the resistor, but it looks to me that you could get to it under the unit.

[BlakSpyda]

Welcome to CA johnsma22. Looks like scr38 has your answer.

[johnsma22]

Thanks for the warm welcome guys, and for the info! Looks like I should just bite the bullet and take it to the dealership to get it checked out. Unfortunately it's no longer under warrantee.

[smoke le]

so did you ever figured out what the problem was???im having the same problem

[johnsma22]

Originally Posted by smoke le

so did you ever figured out what the problem was???im having the same problem

Yes I did. As I have the Automatic climate control system (not the manual system) it was not the blower control resistor. The rear blower in my Armada has the blower control resistor, but the front blower uses a Variable Blower Control Module. I've been looking through my receipts for the part number, but I can't find it.

I just did an internet search for it and I'm having trouble finding the correct part number. I recall going through this trouble when I was looking for it originally. I wish I had better documented where I located the correct part. I think I ended up calling my local Nissan dealer, getting the correct part number from them and then ordered it online.

My blower would only operate on high. After replacing the blower control module it has worked perfectly ever since. It was also extremely easy to replace yourself. It is located on the bottom of the blower assembly right above where a passengers feet would be. There was only 2 screws, I believe, and one electrical connector.

If you have any trouble finding the correct part, I will dig more deeply through my junk and find the receipt. Also, I can take some pics of where it's located if you need any help with that. Good luck.

[smoke le]

Johnsma22 do you remember how much the part cost??Did you get it done at the dealership or diy??

[johnsma22]

I can't remember exactly, but I believe it was under $100. I got the part number from the dealership, but I ordered the part online and replaced it myself. As I stated in my previous post, it was a very easy DIY repair. Nothing needs to be removed to get to the module. It's right at the bottom of the blower assembly, right above where a passenger's feet would be. Remove an electrical connector and two screw and it's out. Reverse to install the new one and you're done.

[Georgie]

Great post and info guys. Over the course of the weekend my 07' QX56 started exhibiting the same problem where the climate control system would only run the fan on high despite the fan speed displayed at lesser increments. Manual adjustment either turned the fan off or put in on high, with no intermediate speeds working. I did some research and purchased a Variable Blower Control Module (27151-ZM70A) from my local Nissan dealer for CDN $68.00.

Changing the module on the QX was as simple as removing a plastic panel underneath the glove box and then taking the module out with two screws and disconnecting a 4 position connector.

Here's a pic of the module I removed (5 fins), the one I replaced it with from Nissan only has 3 fins which equates to less heatsink area. I read the 5 fin is newer but in my instance it failed regardless. The new module works great for the front climate control blower.