I've had my Recharge for 2 weeks. Today was a crazy hot day in the Northeast, mid 90s. With the AC on, I noticed a louder than normal compressor/fan sound...especially when stopped. Never noticed it before (cooler temps) but certainly a noticable loud sound and almost vibrating. If I shut AC off, sound goes away. Could it be heat related or heat pump related?? Anyone experience this? It's such a quiet car that these sorts of things are really noticable.