How To : Fix Blower Motor Chirp

This is what I did to fix my blower motor chirp after reading about it here. My motor has been quite on speeds 1 & 2 for a little over 2 months now. If anyone reports better results using another method, please post it!

This should take about an hour to do if you are familiar with electric motors.

Any and all repairs are at your own risk, I do not guarantee, or warranty these instructions. Only perform work within your skill level.

I used fire arm slide grease. I assume it has a high flash point, and won't burst into flames, but I could be wrong. Make sure you use a lubricant appropriate for the project.

Tools Needed.

Screw driver
Gun cleaning kit
Gun cleaning oil
Kleen-bore Patches
Slide grease
Clean work area.

Disassemble

1. Remove the blower motor from your truck. Unplug the electrical connect and remove the 3 screws around the out side rim of the houseing. The motor should fall come right out.



2. Remove the fan assembly by CAREFULLY prying with a little pressure on the out side edge of the the fan in between the house. Rotate 90 degrees, pry, rotate another 90 degrees, contintue until it pops off.



3.Remove the 2 screws holding the bottom of the motor case together, and remove the rear housing. This is what you should see if you remove it
carefully. Notice all the grit, and how crappy the comm looks.



4.Remove Washers,plastic bushing and o-ring from rear side of shaft. (Pay close attention to the way the came off, I didn't, and I am not sure if I put them back on right, I took the photos after I did the repair for purpose of the write up)



5.Remove the plug and brush housing



6. Remove the shaft with the windings



7. Remove the washers, Plastic bushing, and o-ring from front side of shaft.

8. This is how your disassembled motor should look.




Clean Everything

1.Clean everything inside and out withh a dry rag. The Motor Shaft, the inside of the can, the brush housing, everything! There is a lot of crap in there.



2. Using the nylon brush and some gun cleaning oil, clean the brass
bushing on the front and rear side of the cans.



3. Using a Kleen-bore patch, remove any excess oil and dirt from in and
around the brass bushings.



4.Starting with the comm side of the motor assembly, Apply a small amount of slide grease to the inside of the bushing, the outside edge of the bushing, inbetween washers and o-rings too.





5. Insert the comm side of the motor assembly (without the brush assembly) into the rear housing bushing. Spin and apply pressure.

6. Now remove and wipe away any excess grease. THIS IS IMPORTANT, EXCESS GREASE WILL COLLECT DIRT AND CAUSE MORE WEAR OR DAMAGE TO THE MOTOR!

After spin with pressure



After you wipe the excess grease.



7. Repeat steps 4 through 6 with the fan side of the motor.

8. Remove springs from brushing housing, clean well, and apply grease to inside of housing. Not to excessive, but enough that the brushes slide smooth. THIS IS IMPORTANT. THE CAUSE OF THE CHIRP MAY COME FROM THE COMM EDGES HITTING THE BRUSHES, AS WELL AS IMPROPERLY LUBED BUSHINGS



9. You are now done cleaning and lubing your motor. Re-assemble and re-install.


If anyone has anything to Ad or that I need to fix, please send me a PM.

Good Luck

 

wow. yea i hate that noise but this seams quiet extreme just to get it to be silent while on low. nice write up tho!

 

Well done. my blower motor will come apart for the second time so I can recondition everything again. Good write up

 

nice write up. I have had mine replaced by toyota already and the newer motor is doing the same thing I might just have to do this.

 

how long did this last? i cleaned mine once but not this in depth into it and it started chirping even worse. so i attempted to use a little bit of bearing grease and now it doesnt work at all and the fuse blew also. im taking it to the dealer and better get a new one. biggest pain in the a$$! i dont think i even care if i have to pay for it (although theres only 13k miles so warranty should cover it), but im just done with it, i'll be willing to pay

 

I have 82000k on my truck and they are going to put the new blower motor in under warranty. The noise drives me crazy.

 

I went from chirping to quite. It's been a little over 2 months now.

 

It could probably be done in about 45 minutes. I took my time checking everything out and inspecting it all.

 

Awesome write up.I should have done it myself but just had Toyota do it on my 2010. Motor doesn't make noise but the dash rattles bad at stop signs and red lights.I'm amazed how you can't trust anyone to work on your stuff.so I know have to find what is loose in my dash

 

took it to the dealer today, they said its pretty much all shorted and they need to order a new blower and put in a new fuse. all covered under warranty i believe. But the downside, its 20 degrees and gets to the negatives at night here and i dont have a heater until tuesday i'm all bundled up with the windows cracked to keep it from fogging up

 

Wow that sucks, hate to say but it was 84 today with 50-60s at night.

Will redo my blower motor with this tomorrow. Very detailed write up.

Great job

 

Step #8 fixed mine. I did a lot of what you did but I plugged it back in after each step and nothing fixed it till I greases the brush housing. No ticking for 7 months now. My theory is the comm. is slightly out of round which causes the brushes to move back and forth in the slot. When it's dry there's enough friction to make the ticking noise.

 

Great write up!!!
When you had the bushings out do you think they could be sized and replace with real bearings?

I want to do this and I guess I can suffer through the 50 degree lows while I see if it is possible.

 

all Toyota needs to do is install teflon coated bushings

 

I believe that is the case too. but figured while I was in there might as well get everything done.

I bushing is thin, and I did not have the ability to press them out to measure. I wanted to do the same thing myself. If I have to take it apart again, I will try and measure the bushings.

 

GREAT write up and but what about all that gun related stuff we need as per your examples. What if a Tennessee red neck like me who believes only the police should have guns doesn't have all that stuff. What to do, what to do???

 

I can't believe there is anyone in Tenn. that does not have a firearm!!
Just ask any neighbor I bet they will have a cleaning kit you can borrow

 

And you would be about 100% correct.

 

Here is a pic of the bushing and its housing (top of picture) if that interests anyone.

 

Just an update, I am going on almost 9 months and have not had any chirping.