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A/C blows cold on drivers side but normal air on passenger and the back

Tiny
JOSUE.H
  • MEMBER
  • 2005 JEEP GRAND CHEROKEE LAREDO
  • 3.7L
  • 6 CYL
  • 4WD
  • MANUAL
  • 167,000 MILES
I bought a new blend door motor and replaced it, but it did it still did the same thing, so I took it off and returned it. I wasn't aware that I was supposed to sync it up by removing the fuse or by unplugging the battery. Does anyone think that's why it didn't work? When I start my vehicle with the original blend door motor you can see the gear move and when I had it off I moved the gear that don't come off back and forth but it still didn't change the way the air felt. I have a pregnant wife who cannot ride in our car at this time due to this. Can anybody help me out to figure out what the problem is here? I would really appreciate it. Thank you.
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Thursday, June 18th, 2020 AT 10:58 PM

18 Replies

Tiny
ASEMASTER6371
  • MECHANIC
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Good morning,

If you moved the door manually and the air did not get cold then it is either the door itself in the heater case or it is a Freon issue.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

I would start by checking the actual pressures with a set of gauges to see if the system is working correctly. You can rent a set of gauges or buy a cheap set for this procedure.

The other possibility is the actual door itself inside the case. The gear may be moving but the door is not.

Roy
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Friday, June 19th, 2020 AT 5:04 AM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
I calibrated the blend door motor by removing the HVAC fuse for both front and rear and that still didn't work. I pulled out the glove box and seen the gears move and the door as well. So I don't think its any of that. I am on my way to go get Freon I hope that works, if not do you have any more ideas? Do you know where I would get a gauge and how would I use it and everything I would need? Thank you so much for your help I really appreciate it.
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Friday, June 19th, 2020 AT 1:02 PM
Tiny
ASEMASTER6371
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Harbor freight has a cheap set of A/C gauges and they have the Freon as well.

Roy
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Friday, June 19th, 2020 AT 1:06 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
Okay, thank you. With seeing the video do you think that's what it would be or do you think it would be something else?
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Friday, June 19th, 2020 AT 1:53 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
One step at a time. Let us see what the pressure are at this point.

Roy
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Friday, June 19th, 2020 AT 1:58 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
Is the gauge what is on the Freon can?
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Friday, June 19th, 2020 AT 2:33 PM
Tiny
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No, it is a gauge set with the high and low side gauge to read pressures.

https://www.harborfreight.com/search?q=automotive%20ac%20gauges

Roy
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Friday, June 19th, 2020 AT 2:40 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
At this time I do not have the money for the gauges, but I do have the A/C Pro. Can I just use that to recharge my A/C or do I have to have those gauges? If not how do I recharge it? Again thank you so much for you help I really do appreciate it.
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Friday, June 19th, 2020 AT 2:48 PM
Tiny
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You can try with the charge kit but it is not accurate at all.

Try adding a can and post a picture of the reading after you install the can.

Roy
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Friday, June 19th, 2020 AT 3:03 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
On the gauge on the A/C Pro says filled at 30 psi. So does that mean it's not the Freon?
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Friday, June 19th, 2020 AT 3:08 PM
Tiny
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Is this with the engine running and the A/C on?

If it is, how does the air feel in the car.

If it is without it running, no it is not.

Roy
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Friday, June 19th, 2020 AT 3:12 PM
Tiny
JOSUE.H
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That's what it stopped at.
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Friday, June 19th, 2020 AT 3:33 PM
Tiny
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Okay, again, was the engine running with the A/C on?

How does the air feel inside?

Roy
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Friday, June 19th, 2020 AT 3:54 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
And yes that was with it running and the A/C in high with all the doors open.
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Friday, June 19th, 2020 AT 4:17 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
The air seems to be the same on both sides and the back blowing like it should be.
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Friday, June 19th, 2020 AT 4:20 PM
Tiny
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Good. I would leave it there and enjoy it.

Good job.

Roy
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Friday, June 19th, 2020 AT 4:24 PM
Tiny
JOSUE.H
  • MEMBER
  • 10 POSTS
Thank you so much for your help. Much appreciated from my family.
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Friday, June 19th, 2020 AT 4:54 PM
Tiny
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You are welcome.

Always glad to help.

Roy
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Friday, June 19th, 2020 AT 5:05 PM

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