It's so worth while crawling around under your coach! Found a tiny air leak, found a stone in the (think it's a transmission cooler fan on the drivers side), and the bracket supporting the exhaust pipe had broken,
The pipe was resting on the bodywork at the hole for the tail pipe and putting hairline cracks in the bodywork.
Autozone $4.75 for a new hanger and 15 minutes to modify it using the original parts.
That is your A/C condenser.