A/C blows out warm air

2002 MAZDA 626
165,000 MILES • 2.5L • V6
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
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?
Jul 21, 2020 at 8:14 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 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
Jul 21, 2020 at 11:21 AM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
Okay, I will obtain a set of gauges.
Jul 21, 2020 at 5:28 PM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Okay. Keep me updated.

Roy
Jul 21, 2020 at 5:32 PM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
Okay, Roy.
Jul 21, 2020 at 5:40 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
With them hooked up, and the engine off, the readings should be exactly the same and close to ambient temperature.

Roy
Jul 22, 2020 at 3:39 AM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
Thanks Roy! You are the man! Air is much cooler now. What do i owe you?
Jul 24, 2020 at 5:34 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
How did you make out? Is it fised?

What did you do to fis it?

We would like to know the resolution.

Roy
Jul 25, 2020 at 3:13 AM
Avatar
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.
Jul 26, 2020 at 5:04 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Okay, what are the pressures with the cold air?

Roy
Jul 26, 2020 at 5:07 PM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
The pressure now reads 35,40 psi (low side) and the high side is 45"50 psi.
Jul 26, 2020 at 5:10 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 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
Jul 26, 2020 at 5:13 PM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
Okay, I will check.
Jul 27, 2020 at 4:02 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Keep me updated.

Roy
Jul 27, 2020 at 4:04 PM
Avatar
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?
Jul 29, 2020 at 7:18 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
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
Jul 29, 2020 at 7:29 AM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
Okay Roy, will do!
Jul 29, 2020 at 11:38 AM
Avatar
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!
Aug 10, 2020 at 10:19 AM
Avatar
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?
Aug 10, 2020 at 11:03 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
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
Aug 10, 2020 at 11:13 AM
Avatar
JERDOG63
  • MEMBER
  • 33 POSTS
Okay.
Aug 10, 2020 at 11:21 AM