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A/C not charging properly

mazdaguy on Thu June 10, 2010 9:36 PM User is offline

Year: 1994
Make: Mazda
Model: Mx6
Engine Size: 2.5Liter
Refrigerant Type: R134A
Ambient Temp: 78 F
Pressure Low: 8-65PSI
Pressure High: 100PSI

I tried to charge my system with a can of R134a. One quick squirt of R134a causes the low side to jump from 8psi to 65psi. If I remove the low side coupler I hear a quick puff of refrigerant escaping. Once I replace it the pressure is back to 8psi or so. This happened several times. It’s almost as if there is a blockage near the low side port creating a small space which fills quickly with R134a. The compressor is constantly running. Anyone have an idea what's wrong? Thanks a bunch





Edited: Thu June 10, 2010 at 9:48 PM by mazdaguy

Chick on Thu June 10, 2010 10:36 PM User is offlineView users profile

Did you check for a leak? if so, fix it, and recharge properly.. You need to recover the refrigerant, pull a deep vacuum and recharge the proper amount back into the vacuum, and then trouble shoot. Adding with a kit can is gonna ruin your system.. Do it right and you'll do it once...

-------------------------
Chick
Email: Chick

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Freedoms just another word for nothing left to lose

mazdaguy on Fri June 11, 2010 10:44 PM User is offline


Yes,
I checked for a leak and the system was not leaking. What I don't understand is why the low side pressure jumped way up with only ine squirt of the can and when I removed the can the low side pressure dropped down to 8 PSI. The system is acting like the fill valve on the low side won't allow any refrigerant to enter the system, but when i remove the can and take a separate gage reading, the pressure is only 8PSI.

CCWKen on Fri June 11, 2010 11:34 PM User is offlineView users profile

Are you using a gauge setup with a can tap? Did you open the low side valve?

-------------------------
Ken Kopsky

Custom Car Works
"Rules are for the guidance of wise men and the obedience of fools."

mk378 on Sat June 12, 2010 9:25 AM User is offline

It's normal for the gauge to go up temporarily while charging. The hose and service port are a considerable restriction, and the only way gas will flow through a restriction is to have a pressure difference. Just let it keep charging.

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