I have a Monaco gasser but for what it is worth, your problem may be the lack of insulation above your cockpit. On my unit I had to remove the front cabinets because of another issue. What I found was that they had put in fiberglass insulation that had shifted and compressed. I had areas where the front cap actually had no insulation covering it at all. I removed all of the fiberglass insulation and replaced it with spray on closed cell foam that I bought on eBay. This is a two part foam that expands when it sticks to the surface. This made a huge improvement in keeping the temperature down in the front of the coach. I also made sure that the roof above the cockpit was painted white. You might see if you can see behind your overhead cabinets and check the condition of the fiberglass insulation.