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A/C blows cold air for around 10 minutes and then just blows hot air the rest of the time driving

Tiny
BREESEMTP
  • MEMBER
  • 2008 HONDA CIVIC
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 139,000 MILES
I had a leak fixed in it and recharged. I also changed out the relay and fuses. It also blows out a musty smell through vents right as the warm airs starts to blow. Any suggestions on what could be the cause of this?
Saturday, May 2nd, 2020 AT 2:02 PM

16 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,348 POSTS
Hi,

When it starts blowing warm, have you noticed if the A/C compressor is still cycling on and off? If you turn it off and then right back on, does it work?

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

I'm questioning if the evaporator is freezing up or even there were issues with the low side pressure line can freeze up if the Freon is low. I realize you had it done recently, but anything is possible. As far as the evaporator freezing up, often times it is a result of the control module keeping the compressor engaged continuously. If nothing is freezing up, then we will have to check air door actuators. Something could be closing off the evaporator from the inside of the vehicle.

Let me know. Also, let me know if this has automatic climate control or not, if you hear the compressor cycling when there is no cold air, and pay attention to see if the compressor is cycling and not staying engaged all the time.

Take care,
Joe

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Saturday, May 2nd, 2020 AT 6:45 PM
Tiny
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No, I haven't check the compressor once it starts to do that. I'll look at that tomorrow and get back to you.
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Saturday, May 2nd, 2020 AT 6:48 PM
Tiny
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  • MECHANIC
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Sounds like a plan. Also, when it is working, see if you notice it cycling on and off. It should, otherwise it will freeze up.

Take care,
Joe
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Saturday, May 2nd, 2020 AT 9:44 PM
Tiny
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I just ran the car out in the yard until the air stopped blowing cold and checked under the hood and the compressor was turning on and off while the air was cold, then when it started to blow warm air the compressor is not spinning anymore when the air is on. What needs to be replaced? Just the clutch?
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Sunday, May 3rd, 2020 AT 6:12 AM
Tiny
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  • MECHANIC
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Hi,

The only way to confirm if it is the clutch is by checking if it is getting power. If it is and not engaging, then yes, the clutch.

Are you able to confirm that?

Joe
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Sunday, May 3rd, 2020 AT 8:23 PM
Tiny
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It starts out running and then just stops after about 10 minutes.
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+1
Sunday, May 3rd, 2020 AT 8:24 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,348 POSTS
Hi,

Keep in mind, there are other things that can cause it to turn off. A faulty pressure switch, temp sensors, and so on. That is why I suggested check if there is power. If there is, the clutch is the likely cause. If there is no power, then we need to dig in further.

Joe
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Sunday, May 3rd, 2020 AT 8:32 PM
Tiny
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10-4. I'll check into that.
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Sunday, May 3rd, 2020 AT 8:35 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,348 POSTS
Sounds good. I hope that makes sense. I never know if my directions are clear. LOL Take care and let me know.

Joe
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Monday, May 4th, 2020 AT 8:22 PM
Tiny
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  • MEMBER
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I wasn't able to check the power because I started back at work. I am taking it to my shop that I had original work done to fix the Freon leak. I am passing on all of our conversation.
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Monday, May 4th, 2020 AT 8:24 PM
Tiny
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  • MECHANIC
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Not a problem. If you have a chance, let me know what is found. I'm sure it will help someone in the future having the same problem.

Take care,
Joe
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Monday, May 4th, 2020 AT 8:40 PM
Tiny
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Will do.
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Monday, May 4th, 2020 AT 8:41 PM
Tiny
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Said it was a bad coil in the compressor. Putting new compressor in.
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Tuesday, May 5th, 2020 AT 8:58 AM
Tiny
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Thanks for letting me know. Also, I'm glad it's going to be repaired and working. Let us know if you have questions in the future.

Take care,
Joe
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Tuesday, May 5th, 2020 AT 9:09 PM
Tiny
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Thank you for your help. I pick it up in the morning. I sure hope it works.
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Tuesday, May 5th, 2020 AT 9:12 PM
Tiny
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  • MECHANIC
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You are very welcome. I'm sure it will work. If it doesn't let me know.

Take good care of yourself,

Joe
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Tuesday, May 5th, 2020 AT 9:15 PM

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