Loud Screeeech From Blower Motor - Automotive Repairs - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Do It Yourself > Automotive Repairs


CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 01-16-2016, 11:37 AM   #1
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default

Loud screeeech from blower motor


People,

2010 chevy cobalt LT, ac in ON position 1,2, and 3 do not work at all but when you go to position 4 blower screeches so loudly it hurts my ears. Is it the resistor switch or would you troubleshoot for some other cause?

Now, just a few days ago position 4 actually activated motor ok, and actually blew cold ac, but now, just screeches.

Thanks, people.

Advertisement

__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 01-16-2016, 12:28 PM   #2
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 12,486
Rewards Points: 3,866
Default


Bearings are probably worn out. Probably time for a swap.

Advertisement

Windows on Wash is offline   Reply With Quote
The Following User Says Thank You to Windows on Wash For This Useful Post:
noquacks (01-16-2016)
Old 01-16-2016, 01:21 PM   #3
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 5,667
Rewards Points: 5,982
Default


Ayuh,.... Sounds like 2 problems,....

There's usually a resistor strip in the air flow that powers 1, 2, 'n 3,...

4 is full 12v power, by-passin' the resistor, 'n I agree, the bearin's are shot in the blower motor,...

So, ya need a new blower motor to run #4, 'n a resistor to run #s 1, 2, 'n 3,...
Bondo is offline   Reply With Quote
The Following 2 Users Say Thank You to Bondo For This Useful Post:
noquacks (01-16-2016), r0ckstarr (01-21-2016)
Old 01-16-2016, 01:23 PM   #4
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


Thanks, win. So, a bad bearing will prevent the First 3 fan speeds from turning?
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 01-16-2016, 01:48 PM   #5
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 5,667
Rewards Points: 5,982
Default


Quote:
Originally Posted by noquacks View Post
Thanks, win. So, a bad bearing will prevent the First 3 fan speeds from turning?
Ayuh,... It appears you were typin', as I was answerin' that question,....
Bondo is offline   Reply With Quote
The Following User Says Thank You to Bondo For This Useful Post:
noquacks (01-16-2016)
Old 01-16-2016, 02:21 PM   #6
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


Quote:
Originally Posted by Bondo View Post
Ayuh,... It appears you were typin', as I was answerin' that question,....
LOL!! Right, Bond. Guess I need to buy both items. Dang, reststor is easy but not sure how to remove blower motor. Will peek under there, and see if theres a few screws to undo.

thanks
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 01-16-2016, 06:10 PM   #7
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


OK, got the resistor out, but motor is "sealed" in at factory apparently, with melted plastic . Can cut it out, or melt it out. Geez, how dumb. Utility knife could be dangerous if one slips. maybe will try the tip of a soldering iron.........

if anyone has done this before, let me know .....
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 01-16-2016, 06:33 PM   #8
Member
 
MT Stringer's Avatar
 
Join Date: Oct 2008
Location: Channelview, Tx
Posts: 675
Rewards Points: 1,130
Default


Quote:
Originally Posted by noquacks View Post
OK, got the resistor out, but motor is "sealed" in at factory apparently, with melted plastic . Can cut it out, or melt it out. Geez, how dumb. Utility knife could be dangerous if one slips. maybe will try the tip of a soldering iron.........

if anyone has done this before, let me know .....
There are some Chevy forums on the internet. Maybe you could find your answer there about removing the blower motor. Or go to the nearest dealership and ask them.

Lucky for me, my wife used to work for a Chevy dealership and we have friends that still work there (parts manager), so sometimes it helps to go ask them and get an idea of what is involved, then decide to tackle the job or let them do it.

EDIT: Apparently you aren't the first one to have this problem.

https://www.google.com/search?q=how+...utf-8&oe=utf-8
MT Stringer is offline   Reply With Quote
The Following 2 Users Say Thank You to MT Stringer For This Useful Post:
noquacks (01-17-2016), SeniorSitizen (01-16-2016)
Old 01-17-2016, 08:51 AM   #9
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


Great, now I did it- cut out the blower motor with a hacksaw, and the dang thing works!! No screech, no grinding of bearings, perfectly smooth motor! Sheesh.

Now, I gotta jury rig a bracket to screw it up back in there. Also, yanked the resistor, and for the heck of it I turned on the motor control knob and it works well when on 4 (1,2 and 3 still don't work). Can a motor work without a resistor?

Finally, I popped the resistor back in, turned on the motor switch, and again, 1,2,and 3 don't work, and 4 works well. Still bad resistor? Cant figure out why motor screeched before. what did I get myself into......
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 01-17-2016, 08:59 AM   #10
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 5,667
Rewards Points: 5,982
Default


Quote:
Finally, I popped the resistor back in, turned on the motor switch, and again, 1,2,and 3 don't work, and 4 works well.
Ayuh,... Are you readin' what's bein' written,..??
Quote:
There's usually a resistor strip in the air flow that powers 1, 2, 'n 3,...

4 is full 12v power, by-passin' the resistor, 'n I agree, the bearin's are shot in the blower motor,...
Do you have a multimeter or test light,..??
Bondo is offline   Reply With Quote
The Following User Says Thank You to Bondo For This Useful Post:
noquacks (01-17-2016)
Old 01-17-2016, 09:23 AM   #11
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


Quote:
Originally Posted by Bondo View Post
Ayuh,... Are you readin' what's bein' written,..??


Do you have a multimeter or test light,..??
Thanks, Bond. Yeah, I'm reading. But now I understand that 4 is open , full 12v. Makes sense.

So, if youre convinced bearings are bad, why the smooth motor after I sawed it out? Maybe the motor has a better angle, and bearings run better until the motor goes upside down and then the truth shows itself again with the screech?

thnaks
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 01-17-2016, 11:34 AM   #12
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 5,667
Rewards Points: 5,982
Default


Quote:
Maybe the motor has a better angle,
Ayuh,.... Position of the motor, 'n load on the fan will no doubt effect the bearin's,....

Kinda like how a gyroscope is hard to turn over in yer hand,....

With the ridiculous effort needed to pull the motor, I'd just replace it,....
Never seen one that couldn't be unbolted,...
Might have to take a dash out, but things were bolted together,...

The resistor can be Tested, which is where I'd start,....
Bondo is offline   Reply With Quote
The Following User Says Thank You to Bondo For This Useful Post:
noquacks (01-17-2016)
Old 01-17-2016, 02:09 PM   #13
Member
 
MT Stringer's Avatar
 
Join Date: Oct 2008
Location: Channelview, Tx
Posts: 675
Rewards Points: 1,130
Default


HMMM...I guess my link to the Cobalt forums wasn't much help to you, huh?
MT Stringer is offline   Reply With Quote
Old 01-17-2016, 03:22 PM   #14
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


Quote:
Originally Posted by Bondo View Post
Ayuh,.... Position of the motor, 'n load on the fan will no doubt effect the bearin's,....

Kinda like how a gyroscope is hard to turn over in yer hand,....

With the ridiculous effort needed to pull the motor, I'd just replace it,....
Never seen one that couldn't be unbolted,...
Might have to take a dash out, but things were bolted together,...

The resistor can be Tested, which is where I'd start,....
Fixed the motor, whew. Turns out there is no bearinmg- its a bushing. It was kinda rusty/stuck, so I sanded it down, and put anti sieze on it. Yup, no way to unbolt/unscrew this one, bond. Gotta cut/hack it out, sounds incredible.

So, other than trying out the switch knob, how do you test a resistor? Voltmeter? Ohmmeter? This resistor is not like anyone I ever saw before- has no copper coils. Its a flat circuitboard like thing.......
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]

Last edited by noquacks; 01-17-2016 at 03:35 PM.
noquacks is offline   Reply With Quote
Old 01-17-2016, 03:23 PM   #15
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,597
Rewards Points: 1,062
Default


Quote:
Originally Posted by MT Stringer View Post
HMMM...I guess my link to the Cobalt forums wasn't much help to you, huh?
Yes, it was!! It provided a youtube as well! Thanks!

Advertisement

__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
The Following User Says Thank You to noquacks For This Useful Post:
MT Stringer (01-17-2016)
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to wire a 220V furnace blower motor galole HVAC 8 01-09-2016 07:00 PM
HVAC Furnace Motor blower issue jayta98 HVAC 5 09-24-2015 10:42 AM
Does the size of the Blower Motor matter? Moiz2012 HVAC 3 10-26-2012 04:40 AM
York furnace - blower motor works intermittently on medium speed jeremyp969 HVAC 4 04-18-2012 12:37 PM
nordyne e2eb-015ha blower motor jhw3_2005 HVAC 3 08-20-2010 02:29 PM




Top of Page | View New Posts

 

Search Engine Friendly URLs by vBSEO 3.6.1