The other day I looked under our Tab 400 BDL and notice the foil tape that was installed above the screen on the Air8 exhaust had come loose and was blocking the exhaust by blowing down against the screen when the A/C was on. I'm thinking the heat from the A/C exhaust loosens the glue and the tape that lines the area above the screen. You may want to check your unit. The screen mod was factory installed and not a dealer installed kit.
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