A/C only blowing cool air but not cold

Tiny
ARODR051
  • MEMBER
  • 2015 FORD MUSTANG
  • 3.7L
  • 6 CYL
  • AUTOMATIC
  • 59,000 MILES
I have changed the cabin air filter as it appeared to be clogged. The A/C compressor and the cooling fan seem to be working properly. Just from looking at the A/C condenser from outside of the grille it seems to have some dirt but not much for me to considered it clogged, do I have to remove the grille and inspect it more further? If not what else can I do to try and resolve this issue?
Monday, April 8th, 2019 AT 12:45 PM

13 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good afternoon,

Can you give the high and low side readings for the A/C while it is running? I need to see the actual pressures.

https://www.2carpros.com/articles/how-a-car-air-conditioner-works

Roy
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Monday, April 8th, 2019 AT 12:58 PM
Tiny
SEVAG P
  • MECHANIC
  • 405 POSTS
Hello thanks for using 2CarPros.

it seems your air conditioning Freon level is low.
check our guides:
https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak
https://www.2carpros.com/articles/air-conditioner-leak-detection
https://www.2carpros.com/articles/air-conditioner-how-to-add-freon
let us know if you need more help.
thank you.
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Monday, April 8th, 2019 AT 1:05 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Let's start with the pressure readings before going further. If you do not have a set of gauges, you can rent them at a parts store.

Roy
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Monday, April 8th, 2019 AT 1:06 PM
Tiny
ARODR051
  • MEMBER
  • 7 POSTS
Just rented a gauge set and will be getting the pressure readings soon.
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Monday, April 8th, 2019 AT 2:42 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Okay, I will be here to help.

Roy
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Monday, April 8th, 2019 AT 2:44 PM
Tiny
ARODR051
  • MEMBER
  • 7 POSTS
My readings were 38 for the low and 430 for the high.
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Monday, April 8th, 2019 AT 3:55 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Wow. To high. Is the cooling fan working?

Roy
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Monday, April 8th, 2019 AT 7:20 PM
Tiny
ARODR051
  • MEMBER
  • 7 POSTS
Yes.
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Monday, April 8th, 2019 AT 8:59 PM
Tiny
ARODR051
  • MEMBER
  • 7 POSTS
The low side pressure port was cool to touch and the high side pressure point was hot to touch. If that helps.
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Monday, April 8th, 2019 AT 9:02 PM
Tiny
ARODR051
  • MEMBER
  • 7 POSTS
I could have been using the gauge set wrong although I doubt it as I was following a guide I found online and used various others to confirm what I read. But just in case would you provide me with the steps you use to ensure proper pressure readings?
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Monday, April 8th, 2019 AT 9:06 PM
Tiny
ASEMASTER6371
  • MECHANIC
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The high reading is way too high. It should be two times ambient temperature plus 15%.

If it gets too high, there is a blockage in the system somewhere. The condenser is the most common area where it will clog up.

I would recover the Freon and blow through the condenser to see if it is restricted.

Roy
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Tuesday, April 9th, 2019 AT 1:26 AM
Tiny
ARODR051
  • MEMBER
  • 7 POSTS
What would you recommend using in order to clean the condensers coils?
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Tuesday, April 9th, 2019 AT 8:27 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
It will need to be removed and sent to a radiator shop that can clean it with the proper equipment.

Roy
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Tuesday, April 9th, 2019 AT 8:29 AM

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