Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

AC issues / Need Advice!

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  #11  
Old 07-11-2019, 11:57 AM
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Originally Posted by H32006
This is what I got back:

They did check the pressure.
The "blender motor" is working "good"

I do not have an AC pressure gauge, so tell me what I need to get to check this myself.
They checked the pressure, what were the readings along with the ambient temperature?
Note: pressure chart I posted above.

This video will give you an idea, scotty bought the gauge set at harbor freight 49bucks.. Expansion valve is very common problem too
 
  #12  
Old 07-11-2019, 02:27 PM
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I asked, did not receive that info.

They are great but think I need to check this myself.

What do I need to buy or rent to check this myself?

Originally Posted by hummerz
They checked the pressure, what were the readings along with the ambient temperature?
Note: pressure chart I posted above.

This video will give you an idea, scotty bought the gauge set at harbor freight 49bucks.. Expansion valve is very common problem too
https://www.youtube.com/watch?v=80jSH8VQZms
 
  #13  
Old 07-11-2019, 03:13 PM
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***Take it to another A/C repair Garage and see what they say...
 
  #14  
Old 07-11-2019, 04:06 PM
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Originally Posted by H32006
I asked, did not receive that info.

They are great but think I need to check this myself.

What do I need to buy or rent to check this myself?
Get a manifold gauge set. Make sure to buy a set with adjustable couplers(non adjustable couplers have been know to damage the shraders and cause refrigerant loss), you only want to screw the couplers to the schrader until the pressures read on the gauges. Like this set:



Amazon Amazon


 

Last edited by hummerz; 07-11-2019 at 04:13 PM.
  #15  
Old 07-11-2019, 04:20 PM
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Originally Posted by ski.dive
***Take it to another A/C repair Garage and see what they say...
Many shops will offer free A/C Checks. Firestone has a $9.99 performance check:

(the main thing is to get the pressures & ambient temp at the time of check, then diy the repair and return for a system vac & charge)

 
  #16  
Old 07-20-2019, 03:31 PM
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Thanks again HummerZ.

No free checks in LA, but Firestone is $10.

Right now it is blowing whatever the outside temp is, so if it is 90º it is blowing it, sometimes it kicks in, but still not very cool.

Will bring it in to Firestone on Monday and see what we get.

Spoke with them and over the phone they said it could be electrical.
 
  #17  
Old 07-20-2019, 03:40 PM
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Originally Posted by H32006
Thanks again HummerZ.

No free checks in LA, but Firestone is $10.

Right now it is blowing whatever the outside temp is, so if it is 90º it is blowing it, sometimes it kicks in, but still not very cool.

Will bring it in to Firestone on Monday and see what we get.

Spoke with them and over the phone they said it could be electrical.
Electrical(blend door)? Same temp as outside? Do you own a thermometer?, Stick it in the center vent, ac on, low speed, change air flow selector, etc.. @idle you should see at least 40degrees below ambient temp @90degrees.

https://www.harborfreight.com/1-inch...SABEgLuYvD_BwE

https://drivrzone.com/proper-auto-ac-vent-temperature/
 

Last edited by hummerz; 07-20-2019 at 03:44 PM.
  #18  
Old 07-20-2019, 03:50 PM
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1 more question: Do you get a wet spot on the ground under the passenger front with a/c on, parked,= condensation from the ac?
 
  #19  
Old 07-20-2019, 04:21 PM
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I just went out to my H3 parked in the back yard enclosed with fence around. It's 95 degrees outside, when I first checked temp inside it was 110 degrees. My ac system is all original and here is what I just got:




 
  #20  
Old 07-20-2019, 05:32 PM
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Another thing to check, look for your low side ac line under the hood... At idle with ac on, it should be dripping with condensation especially on hot/humid days, and if you touch it(be careful if you are close to the fan) it should be cold=Compressor is operating properly.

 

Last edited by hummerz; 07-20-2019 at 05:36 PM.


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