As a Tech for an A/S dealer, I will bet the rear cooling fan is inop. A/S has Dometic add the rear 12 volt fan in their installs due to the way the roof curves and the fact of the aluminum sidewalls. To test, just open the rear outside door and install a 120 volt small fan blowing upwards for 24 hours. Then measure the temp again. You should also HEAR that fan if it is running. One of the biggest complaints we get from A/S owners is the sound of that fan running. They do not understand why they hear a fan. Doug
