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Old 07-12-2020   #1
Vette73
 
Join Date: Nov 2014
Location: Brooklyn ny
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Default Weak fans inside car at highest setting.

Not that I use my AC much, if at all..Still at setting 10 on the fans the stream of air is very weak....Any way to improve this ? Or its not operating correctly..??
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Old 07-12-2020   #2
-=Jeff=-
 
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Default Re: Weak fans inside car at highest setting.

Marc has run a new wire to run parallel to the original which made an improvement. I have manual AC and I am working on a plan for the same however GM ran wires back and forth across the car so it not as simple.
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Old 07-12-2020   #3
secondchance
 
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Default Re: Weak fans inside car at highest setting.

Has it always run weak? Is there any difference between 1, 5, and 10 setting? It could be fan control module.
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Old 07-13-2020   #4
lfalzarano
 
Join Date: Feb 2011
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Default Re: Weak fans inside car at highest setting.

I just had the same issue this week.


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Old 07-13-2020   #5
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Default Re: Weak fans inside car at highest setting.

In stock configuration mine had 10mph air flow out the vents. After Marc did the 200 amp alternator upgrade and double wired to the AC fan the output was measured at 14mph. Huge improvement in air flow for cooling and heating.
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Old 07-13-2020   #6
lfalzarano
 
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Default Re: Weak fans inside car at highest setting.

Marc is a long way from Clayton, NC[emoji20]


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Old 07-13-2020   #7
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
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Default Re: Weak fans inside car at highest setting.

Mine are weak also.
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Old 07-13-2020   #8
Vette73
 
Join Date: Nov 2014
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Default Re: Weak fans inside car at highest setting.

Quote:
Originally Posted by secondchance View Post
Has it always run weak? Is there any difference between 1, 5, and 10 setting? It could be fan control module.
Tell you the truth I believe it always has...Only used the AC a few times and that was on long trips with a lot of open roads..

I will check the fan control module...
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Old 07-13-2020   #9
-=Jeff=-
 
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Default Re: Weak fans inside car at highest setting.

Quote:
Originally Posted by Vette73 View Post
Tell you the truth I believe it always has...Only used the AC a few times and that was on long trips with a lot of open roads..

I will check the fan control module...
if it varies, then I doubt it is the module..
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Old 07-13-2020   #10
secondchance
 
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Default Re: Weak fans inside car at highest setting.

Quote:
Originally Posted by dredgeguy View Post
In stock configuration mine had 10mph air flow out the vents. After Marc did the 200 amp alternator upgrade and double wired to the AC fan the output was measured at 14mph. Huge improvement in air flow for cooling and heating.
I followed suit and also installed 200 amp hair pin alternator along with a pair of Spal fans, extra 8 ga. Wire between the alternator and the battery plus 14 ga. between the battery and the HVAC module. Combination of extra cooling of ac condenser and extra oomph at HVAC condenser, it felt nice and cool even in 96 degree day in DC. This is with glass top.
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