Why doesn't my A/C cool when @idle? on 2005 Mercury Montego

Static pressure is Low 65 High 150 Running is Low 43 High 150 Both cooling fans are running but my system will not cool at an idle. Temp outside was 66 and the temp in car on pass side was 49 at 1500rpm. Cools fine on the Highway. Could it be my compressor or something else?

by in Dillon, SC on May 07, 2012
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1 answer
ANSWER by , May 08, 2012
Not sure what you mean on your static readings. With system not running stactic pressures should be equal. I'm assuming you are taking that reading at idle. System could be low on charge by a few ounces. Exact charge is critical. May try evacuateing system and then recharge with the proper charge.