MY AC/HEATER FAN DOES NOT WORK ON THE HIGHEST SETTING

  • Tiny
  • Jake1755
  • 1995 Pontiac Bonneville
  • 208,000 miles

But does work on the lower settings. Any help appreciated. Thanks! Highest fan setting does not work.

Monday, July 2nd, 2012 AT 10:58 PM

17 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

Do you have a multimeter to do some testing? Could be the high speed blower relay.

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Monday, July 2nd, 2012 AT 11:01 PM
  • Tiny
  • Jake1755
  • Member

I do have a multimeter. Where is the blower relay located? Thanks

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Monday, July 2nd, 2012 AT 11:09 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

Do you have auto climate control where you dial in the desired temp?Or a manual ac controls?

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Monday, July 2nd, 2012 AT 11:18 PM
  • Tiny
  • Jake1755
  • Member

Manual rotary controls.

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Monday, July 2nd, 2012 AT 11:19 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

Its labeled N2 in the diagram.

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Monday, July 2nd, 2012 AT 11:29 PM
  • Tiny
  • Jake1755
  • Member

I'm not quite sure where under the hood this is. Is it under the fuse/relay panel? Looks like I have 7 relays under the 2 fuse boxes.

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Monday, July 2nd, 2012 AT 11:51 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

Facing the front of the car along the firewall on the far left side like it shows is the blower relay.

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Monday, July 2nd, 2012 AT 11:55 PM
  • Tiny
  • Jake1755
  • Member

Found it. I've got the relay out, is there a way to test it or do I just put in a new relay?

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Tuesday, July 3rd, 2012 AT 12:05 AM
  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

We could test if the relay is working if you had a mulimeter or test. See if any of the other relays are the same as the blower motor?If there are swap it and see if it works on high?

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Tuesday, July 3rd, 2012 AT 12:20 AM
  • Tiny
  • Jake1755
  • Member

Swapped relay with no change. I forgot to mention that the air is only coming out of the defrost vent and not through the dash vents, any idea on that one? Thanks for the help.

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Tuesday, July 3rd, 2012 AT 12:35 AM

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