A/C not blowing cold?

Tiny
JOHN VICKERY
  • MEMBER
  • 2013 FORD F-150
  • 3.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
When outside temperatures get above 75 degrees my A/C will only blow luke warm air. If it is under 75 degrees it will start blowing cold again.
Tuesday, June 20th, 2023 AT 9:38 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,665 POSTS
It sounds like the system is a little low on refrigerant or you have a programming issue. I would check the low side pressure by following this video.

https://youtu.be/4EqdrBVb0sY

and

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

If the pressures seem okay, I would try resetting the HVAC system by following this guide:

https://www.2carpros.com/articles/step-by-step-guide-to-reset-your-cars-hvac-system-an-essential-for-every

If that doesn't work, we need to do a CAN scan which will go over the HVAC system, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Please go over these guides and get back to us because it might be the temperature sensor. Check out the images (below). Please let us know how it goes.
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Wednesday, June 21st, 2023 AT 11:13 AM
Tiny
JOE VICKERY2
  • MEMBER
  • 1 POST
The refrigerant was low and when I added more it fixed the issue for now.
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Saturday, June 24th, 2023 AT 7:16 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,665 POSTS
Thanks for letting us know, we are here to help, please use 2CarPros anytime.
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Sunday, June 25th, 2023 AT 11:44 AM

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