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A/C doesn't work?

Tiny
CAMPERMONROE
  • MEMBER
  • 8 POSTS
I have reset system will let you know if it works with in a few days
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Ok. We'll be waiting.
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
CAMPERMONROE
  • MEMBER
  • 8 POSTS
Ok relearn did not work passenger side now blowing hot with ac on
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Can you cycle the unit through the various settings and listen for the doors to actuate? Do they seem to be moving?
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
S6COOPER
  • MEMBER
  • 1 POST
  • 2004 GMC YUKON
  • V8
  • FWD
  • AUTOMATIC
  • 105,111 MILES
Hi.
I just had the transmission rebuilt in my Yukon Xl. I picked it up and noticed that the air conditioner does not cool on the drivers side. Everyother vent is receiving cold air. The driver side is pouring out heat. Could this be related to the transmission? How can this be fixed.
Thanks
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check under the dash for a vacuum or electric motoor. It will have a shaft connected to it. The door may have stuck or there is a vacuum line off, maybe under the hood on the firewall or under the dash or it's just not getting the power to itto move the motor. You may have to remove a panel to get under the dash.
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
CAMPERMONROE
  • MEMBER
  • 8 POSTS
Yes today it is working fine right know I might change both actuaries this week many they are both weak before changing the control module don't know what else to do. Need to fix before wife kicks me out of bed
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Ok, let us know how it goes with the actuators. Without being able to see and touch it, those would be my guess as to the culprit.
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Thursday, July 16th, 2020 AT 12:04 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,542 POSTS
  • 2004 GMC YUKON
  • 165,000 MILES
Front ac ac and heat driving down road ac changes to heat could be drivers side passenger side or both winter has opposite effects
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try pulling hvac fuse first for 60 seconds, then reinstalling and waiting 60 seconds then see if it works right, sometimes this resets actuators to work if electric it may also be your control panle hass gone bad but tha will need to be scanned.
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
BRUGA007
  • MEMBER
  • 6 POSTS
  • 2004 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
This is a split zone heating and cooling in the front. The driver side only blows cold air, and the passenger side only blows hot air. No matter where the slide is at. Could it be the actuator? And if so which one? The temp actuator?
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Your vehicle has two blend air doors. If you are referring to the blend door actuator, that is my first guess. They are located near the heater core box under the dash. Check to see if they respond when you try to adjust the heat / cold.

Let me know what you find.
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
BRUGA007
  • MEMBER
  • 6 POSTS
I was wondering since both sides went out at the same time, is there something common? Would both actuators fail at the same time?Or is there also a common temp actuator? I will pull the cover and take a look and tell you what I find thanks
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
It's odd that both would go at the same time. Have you checked simple things such as fuses or power supplies?
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
BRUGA007
  • MEMBER
  • 6 POSTS
Hello again,
I removed the blend door actuator and manually moved arm side to side. I now have hot air and cold coming from drivers side, so I ordered the replacement. Does the passenger side have a seperate actuator as well? That side seems to only blow hot air. If so where is it located? Thx jeff
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Yes, both have their own actuator.
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
BRUGA007
  • MEMBER
  • 6 POSTS
Where is the other one? Thx I only see one when I remove the cover
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
See if these pics help. One is the left and the other the right.
Images (Click to make bigger)
Thumb
Thumb
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
BRUGA007
  • MEMBER
  • 6 POSTS
That's the same picture thanks though
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Wow! I must have selected the same one 2 times. Did it help or do you need me to find the other?
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Thursday, July 16th, 2020 AT 12:05 PM (Merged)

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