Century Buick's mid sized affordable sedan

Fan speed

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  #1  
Old 04-11-2008 | 03:55 PM
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The AC/heat fan speed works on lowest setting, then it stops working when placed in the next highest position (low to middle), and works again in the higher postions 3,4,5 highest. I checked all the fuses and they are good. Any techs no about this?


2005 Buick Century


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  #2  
Old 04-11-2008 | 09:05 PM
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could be the blower motor resistor, or the switch itself. but usually the resistor will fail first.
 
  #3  
Old 04-12-2008 | 02:53 AM
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Do you know where and how to locate this resistor? I am hoping it is not under that panel on passenger side. My knees are bad from a recent fall, so it hurts to get down there.
 
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Old 04-12-2008 | 09:24 AM
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i have not replaced one in that year century. but on most cars they are on the passenger side firewall. usually very close to the blower motor.
 
  #5  
Old 04-13-2008 | 01:56 PM
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hopefully it is something that simple. I go to wait awhile for my knees to heal before I can craw under that passenger side though. Thanks for the help.
 
  #6  
Old 04-13-2008 | 09:10 PM
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usually you can get to them from the top. just open the hood. (emphasis on usually)





p.s.please read this link https://www.buickforum.com/forum_pos...=1479&PN=1





p.s.s. not too expensive http://www.partsamerica.com/ProductL...artType=861&am p;am p;PTSet=AEdited by: samueljackson
 
  #7  
Old 04-15-2008 | 10:19 AM
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Thanks for the link to parts, the picture will help me find this thing. Looking under hood, I do not see anything mounted on firewall. Sure wish I had a picture of this vent motor location / access.





2005 Buick Century


 
  #8  
Old 04-15-2008 | 03:20 PM
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try the link in this thread


http://www.bonnevilleclub.com/forum/...php?t=95990&am p;highlight=library
 
  #9  
Old 04-16-2008 | 01:14 AM
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Thanks, that is an excellant resource. I actually found some schematics for the AC system. Looks like either a bad switch, or open resistor problem from the drawing anyway. I pulled the **** off of the Fan speed selector switch, and notice some resistors in there on a small ciruit board. Wondering if those are the ones?


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  #10  
Old 04-16-2008 | 03:24 PM
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if you have a meter, and you see resistors, you could test the resistors for continuity.
 


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