PewterPower....What you're discribing has nothing to do with the H2. It's a simple matter of the engine fan not being able to condense the refrigerant in the condenser (at the radiator)after sitting at idle for extended periods. Common problem with all vehicles in high ambient temperatures. As soon as you move forward the additional air over the condenser does the trick. You can install an electric aux fan that might help.
A/C business in Las Vegas
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Jonahs
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