A/C blows out warm air

Tiny
JERDOG63
  • MEMBER
  • 2002 MAZDA 626
  • 2.5L
  • V6
  • 165,000 MILES
My air conditioning blows warm air and I can hear the compressor operating intermittently.I checked the refrigerant with a gauge and it fluctuated from the green area to the red area.I used the gauge to release from refrigerant until it registered green.I still have warm air blowing and would like to if you can help?Roy was an absolute astonishing helper on my fcps and wonder if he can help with this problem?
Tuesday, July 21st, 2020 AT 8:14 AM

21 Replies

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

Hello again,

What was the pressure number on your gauge? It would be great if you could rent or buy a cheap set of gauges to give me the high and low side readings of the Freon pressure system.

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

Roy
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Tuesday, July 21st, 2020 AT 11:21 AM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
Okay, I will obtain a set of gauges.
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Tuesday, July 21st, 2020 AT 5:28 PM
Tiny
ASEMASTER6371
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Okay. Keep me updated.

Roy
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Tuesday, July 21st, 2020 AT 5:32 PM
Tiny
JERDOG63
  • MEMBER
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Okay, Roy.
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Tuesday, July 21st, 2020 AT 5:40 PM
Tiny
ASEMASTER6371
  • MECHANIC
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With them hooked up, and the engine off, the readings should be exactly the same and close to ambient temperature.

Roy
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Wednesday, July 22nd, 2020 AT 3:39 AM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
Thanks Roy! You are the man! Air is much cooler now. What do I owe you?
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Friday, July 24th, 2020 AT 5:34 PM
Tiny
ASEMASTER6371
  • MECHANIC
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How did you make out? Is it fised?

What did you do to fis it?

We would like to know the resolution.

Roy
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Saturday, July 25th, 2020 AT 3:13 AM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
Hi Roy!

I used the manifold gauges and the low side reading was like fluctuated at 50 psi and the high side reading was barely 50 psi.I used the gauges to release most of the refrigerant and then refilled system with new refrigerant and got cold air.
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Sunday, July 26th, 2020 AT 5:04 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Okay, what are the pressures with the cold air?

Roy
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Sunday, July 26th, 2020 AT 5:07 PM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
The pressure now reads 35, 40 psi (low side) and the high side is 45"50 psi.
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Sunday, July 26th, 2020 AT 5:10 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
They should not be the same.

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

If the compressor is engaged, the compressor is bad and needs to be replaced.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

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

Can you check and see if the compressor is engaged?

Roy
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Sunday, July 26th, 2020 AT 5:13 PM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
Okay, I will check.
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Monday, July 27th, 2020 AT 4:02 PM
Tiny
ASEMASTER6371
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Keep me updated.

Roy
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Monday, July 27th, 2020 AT 4:04 PM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
Hi Roy! So, this is what I tried: I connected the low side hose to the low side and red hose to high pressure side I then opened the valves up on both hoses (keeping them closed at the manifold end)and started the car and air conditioning running on high and my readings are low side fluctuations at 50 PSI and high pressure stuck at 50 PSI. What am doing wrong?
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Wednesday, July 29th, 2020 AT 7:18 AM
Tiny
ASEMASTER6371
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Close the valves and give me the readings. By opening the valves, you are equalizing the pressures.

Sorry, close the ones on the manifold, not at the connections.

If they are that low, you have a Freon issue. The pressure should be close to ambient temperature.

Roy
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Wednesday, July 29th, 2020 AT 7:29 AM
Tiny
JERDOG63
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Okay Roy, will do!
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Wednesday, July 29th, 2020 AT 11:38 AM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
Hi Roy! Sorry it took me a while to get back to you.I took your advice and the gauge finally showed psi on low is 45 and the high side is 195.I added Freon and this is what I got. Thank you so very very much. Air is much cooler. I will be logging in to ask another question for the same car. You are really helpful!
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Monday, August 10th, 2020 AT 10:19 AM
Tiny
JERDOG63
  • MEMBER
  • 33 POSTS
I don't think my first text went out. Any way I am having trouble connecting my intake check valve back together after intake repairs.I have photo enclosed and don't know where the hose run to.I am sure it is a vacuum situ but can you help with where it runs to coming from this end?
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Monday, August 10th, 2020 AT 11:03 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Okay, since we are done with the A/C, you need to start a brand new thread from the beginning. We can only deal with one issue per question.

Roy
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Monday, August 10th, 2020 AT 11:13 AM
Tiny
JERDOG63
  • MEMBER
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Okay.
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Monday, August 10th, 2020 AT 11:21 AM

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