i had a similar problem with my C. i smelled propane inside my coach, primarily when i opened and closed the fidge. i know this sounds weird, but we had a tech check it out with a "propane sniffer", the problem turned out to be the valve at the propane tank was not closed completely tight. gas, being heavier than air, was leaking and flowed underneath the coach and apparently came up into the outside compartment of the fridge and then into the fridge itself. After we tightened it, the smell was gone. Since we had just filled the propane tank, this kinda makes sense.