My RTV 1100 heater works well but when i lower the temperature setting to adjust the heat I get very hot air on the windshield and cold from the dash vents. I have the whindshield/floor selected for blower output and the dash is not selected at all. Last year, after i purchased it, the dealer replaced the control unit and it did the same thing. They checked another 1100 from their stock and it did the same thing. Pretty annoying to have cold air blowing at you when the cab it almost too warm. If I close the dash vents it is better but the cab still gets pretty warm Anybody else experienc this?