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Rangerj
User
Apr 4, 2010, 4:41 PM
Post #1 of 9
(2276 views)
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!999 Chevrolet Malibu 3.0 Auto. The AC light (green) will only stay on for a few minutes then turns off,then it quits cooling, any ideas? Also where is the port (blue cap) to charge AC located? I can only find the red one. Thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 4, 2010, 4:51 PM
Post #2 of 9
(2274 views)
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Might just be a black cap, aqua or who knows. Follow larger or low side line, it should be on line or on an accumulator - some well hidden and some along under radiator to make it interesting.
Check just static pressure like you would a tire and the ambient temp first. If pressure is lower in PSI than the temp in Fahrenheit it is very low if above 70 degrees pressure should be higher than pressure. Start there and don't be adding anything till you know what's up,
T
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Rangerj
User
Apr 4, 2010, 4:55 PM
Post #3 of 9
(2270 views)
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Tom, Thanks for your super fast response, I couldn't find any other cap anywhere,nothing other than the red one.I will look some more. Also Do you have any idea about the a/c switch turning off by itself?Thanks.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 4, 2010, 5:14 PM
Post #4 of 9
(2266 views)
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They had a lot of problems with the control heads on those models causing it to go into auto shutdown as yours is..
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 4, 2010, 6:20 PM
Post #5 of 9
(2262 views)
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HT may have more specific details on where the low cap is and there is one. I just don't know the car intimately and if you found the red cap which would be high side then there probably is a color to low side cap.
As said - hiding places are as bad as having to remove air filter housings or down under on some and it's even hard to follow the lines as they go into places you can't see very well or at all.
Looked back and you said it did cool some and would quit. It wouldn't cool at all if static pressure is that low as I first suggested so this probably is incorrect info getting sent or received from some sensor.
It could be low and just shutting down and then after a while engine heat would fool it that refrigerant is enough to engage but we/I don't know that yet so again - don't be adding refrigerant as that may not be the issue and too much is a BAD thing!
Keep looking for the port as you will need to know where it is sooner or later. Hiding places already mentioned and one more is way down back behind engine and firewall. Dang cars just don't have uniformity with that stuff,
T
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Rangerj
User
Apr 4, 2010, 7:57 PM
Post #6 of 9
(2255 views)
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Thanks again fellows for your help, I will follow the advice given.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 5, 2010, 2:24 AM
Post #7 of 9
(2251 views)
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I don't have any pictures of this one but if I remember right, it's down behind the engine, against the firewall on the passenger side, under the alternator.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 5, 2010, 4:53 AM
Post #8 of 9
(2246 views)
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Yep - that's a hard one to find let alone get a position to attach the hose if so. Find a VERY dexterous 2 year old
If I recall that one (if so) a right angle ended quick connect on hose is near mandatory,
T
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Rangerj
User
Apr 10, 2010, 8:38 AM
Post #9 of 9
(2217 views)
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Turned out to be a bad switch in the dash. Problem solved. thanks
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