After a few days of taking delivery of my Grenadier we noticed that intermittently the air conditioner would not blow cold and in the rear it blew hot. This was only occurring occasionally, however, I wanted to have it looked at so I made a service appointment. They stated they could not replicate the problem but that they found a loose A/C hose which they replaced. Today the issue arose again. Has anyone had a similar issue and what did you finally do to resolve the issue.