A/C blowing warm air?

Ive seen this happen before just becuase there wasnt enough refrigerant in the system these systems take a spe ifued amount wich must be measured out carfully each system is different with its own required amount it uses. Also to much or not enough oil. Theres a few things that can cuase this problem like
1. Did you evecuate the system first befor filling it . Was a manifold and or a vacume pump used to mearure the pressure inside the system to establish a starting point for the filling or evacuation process?
2. Did the can of refrigerant say it was the type with or without oil in it. Some have it some dont. Ive seem people ad the tyoe with oil and over fill it a d damage the pump. Did you drain it?
3 did you fill it with the eng running and with the ac on
4. How did you determine the amount of oil was in the systen befor you started the evacuation and or refilling process ? Did you
Check all electronic devices associated with the ac system to see if any where faulty
These systems can be damaged easily. Always use extream caution when working with these systems.

That said "use your own best judgement if you decide to try this
. It could damage the system if you dont take into acaount the things ive meantiined above
. Please read this carfully before attempting to rapir it
. From my own experience .
Somtimes this happens if you simply dont have enough or to much refrigerent or oil or both uhin the system. You need to determine exactly how much your gonna need if any before hand. If its determined that you dont have enough you can ad some slowly while its running with the ac on. And watch the ac punp clutch cycle on and off as you ad some refrigerant. When doing so you might notice the clutch staying on a bit longer and longer as you ad some. And the high side increase in pressure as you fill it slowly using short burst. Wait 20 seconds or so in between times giving it a chance. To fully circulates through the system. Keep watching till the pump clutch cycles on and stays on for up to one min then stop filling dont go beond this point it can damage the pump . If all seems well it should be good by then let it run a while the try turning the ac of wait a few min and turnit back on you should have cold air shortly after its turned back on .. This has worked many times for me on many different cars where this problem accured but only works when youve determined it didnt have enough refirgerant in it. But keep in mind its up to you if you want to try this. Good luck hope this helps