Quote:
Originally Posted by grouseman
Hi Folks. My wife's car is a 2005 Aveo. She is complaining about the lack of air conditioning. It has good air flow so I checked the temperature. Outside temperature is 88 deg F and humid today (ugggg). Temperature coming out of the vent is 67 deg F. I think that is really good but can't convince my wife.
Your thoughts would be appreciated.
Grouseman
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the problem is very high humidity . that prevents the air to chill down . the heat cannot be absorbed by the evaporator coils with them covered with a lot of water or even ICE.. it does happen when the system is low on charge the evap can freeze esp on a very humid day.
the low side pressure should be 40 psi .if you find its 25-30 psi then this will be a low charge condition provided that nothing is broken. adding 12 oz to the low side until it gets to 40-45 psi ac on max doors open rev engine so its at 1000 RPM ....air temp 80 deg F or so ....never put too much in ...
as was mentioned see what the air temp is coming out of the vents. 25-30 deg f below the outside air temp is good. so if its 90 should be around 60 after it has run a while .. make sure the evap drain is working to dump out the water...
last year it happened to me a very small piece of tree crap restricted the drain I had to take out the interior rugs it took a week to dry them out .. must of been 4 gallons of water in there .