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I recently replaced the condenser on my terrain. For the first month or so the A/C worked great in the car. For the last 2 weeks or so this problem seems to be getting worse.

The A/C will begin to cool when I am at idle but as I begin to accelerate the air begins to warm. When the car slows down again the temperature begins to drop. When I come to an idle the temperature will settle at around 70 degrees.

The temperature swings are between 70 and 89 degrees while driving. I have ran the scanner and nothing stands out. I haven’t had a chance to hook up hoses yet to check the pressures that will be my next step.

Any guidance will help. Thanks!
 

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2010 GMC Terrain - SLT - V6 - 225K Km's (~140K miles) - Gold Mist - Largely restored
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Does it matter if you're actually moving, or simply the act of revving it up will do it?
You definitely want to check high/low pressures. Remember to check your temp chart. 134 is close to what 22 used to be, so if it's 90F expect 90 on the low and about 200-250 high.
 
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