2005 Suzuki XL7 sun load sensor

The a/c compressor on my 2005 suzuki xl7 short cycles on hot, sunny days only. Dealer checked it out. Charge and pressures good. He found no problems at all. I told him when it happens etc. And writer told me that it shouldn't matter where and when he checks it. After 2 days of nothing I picked it up and got a different writer who mentioned that another suv had the same problem and it was the sun sensor but he couldn't be sure if I had the same problem. I am trying to find out where the sun load sensor is located. I don't even know what it looks like. Can anyone help?