Question about 2002 Suzuki XL-7

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2002 Suzuki xl7 Mysterious Overheating Issue

My 2002 Suzuki xl7 thermostat gage reads that it is about to overheat when cruising at 70 mph or driving uphill over 55 mph. When the gage is this high (touching the front of the red area) the air conditioner kicks off and blows warm/hot air. Once the car slows to 60 mph or crests the hill to go down the gage drops to just above the halfway mark away from the red and the air conditioner kicks back to cool. Checked the coolant level and it is normal, no leaks any where noticeable. The belts look to be fine and none are missing. No warning lights or check engine lights appeared at all any time driving when the gage reached the red. Other notes: Air conditioner was in-use on cold medium fan. When cruising at constant speeds the cruise control was in-use Outside temp 88F - 97F

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Most Suzukis A/C systems will cut out when the engine tempurature is too high (to reduce the load on the engine). Also, in this condition, when the A/C compressor cuts out, the A/C thermo fan (electric - in front of the condensor) may come on ( to try and cool the engine). Combined with the fact that your temp gage says the engine is hot, I would be checking your cooling system very closely. It could be as simple as leaves blocking the air flow through the radiator (between the condensor and radiator), or as serious as the internal cores of the radiator being blocked (different sorts of coolant being used can sometimes produce solid matter that can do this).

Posted on Sep 17, 2009

Testimonial: "Great explanation and advice to check the cooling system, specifically the radiator. Unfortunately the internal core of the radiator was blocked."

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Not an issue at all.

rate this

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