I have a 2010 Buick for the last two years I have a limited amount of air conditioning. I took it to the Buick garage and had them check the air conditioning they told me it was working good. The mechanic turned it all the way to low and the fan to high and it was putting out cold air but the temp. outside was only 78. When it was 89 it didn’t feel cold. I changed the filter in back of the glove box. Is there another filter or some way I can clean the evaporator. I bought a thermometer, the air coming out is only 60 I checked my other car and the air is 40. Can you give me any advice. I bought a can of Freon and tester but the tester didn’t work it showed over 100lbs it should only be 50lbs I let a lot out but it didn’t help so I put some in.
Thanks Bill Krieg