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AC/heat blower quits after 3 hours

Tiny
CJWATKINS
  • MEMBER
  • 2002 OLDSMOBILE ALERO
  • 114,000 MILES
Winter with heater and summer with ac, after about 3 hours on the road the air quits blowing but the fan sound on and fan noise changes if you turn the knob up or down but still no air at any knob setting.
Monday, September 16th, 2013 AT 10:00 AM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Doe sthe air quit or does it still blow but not through vents? Pull haveac fuse for 60 seconds with key on then reinstall see if that fixes it. If not check blower fuse and relay in underhood box.
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Monday, September 16th, 2013 AT 10:38 AM
Tiny
CJWATKINS
  • MEMBER
  • 4 POSTS
Not sure where air would blow if not through vents and do you mean with key turned far enough for acc. But not far enough to turn car on?
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Monday, September 16th, 2013 AT 1:10 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Do you get any air movement through the dash/floor or defroster?
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Monday, September 16th, 2013 AT 3:00 PM
Tiny
CJWATKINS
  • MEMBER
  • 4 POSTS
None through dash vents or defrost vents-not sure about floor
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Tuesday, September 17th, 2013 AT 8:29 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Okyour actuators aren't working, check for a vacuum leak and the three items I've pointed out in pic. The bottom one in pic is elelctric that is for heat/a/c temp so thatmy not be getting power start at engine for vacuum leak.
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Tuesday, September 17th, 2013 AT 12:08 PM
Tiny
CJWATKINS
  • MEMBER
  • 4 POSTS
I have since found out that no it does not blow air out of the floor vent after it quits- does this change your suggestion of what the problem is?
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Tuesday, September 17th, 2013 AT 12:34 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Nope you have a vacuum leak either the switch on the dash isn't letting it out or one of the vacuum motors isn't working or you have a piece of junk plugging the line someplace.
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Tuesday, September 17th, 2013 AT 12:36 PM

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