I have a 2008 Rinker 350 with a MarineAir system. The product number is 205-311740, model number VCD18K/1-HV. My control unit is running software A21. Recently the unit has started not running because it will show a ambient temperature of something like 50 to 57 degrees, the actual temperature in the boat will be much higher. For example, this morning it was 79 degrees in the boat and the desired temp setting was at 69 degrees but the ambient temp reading was 54 on the control panel. Can you give me any ideas of what might be going on with the unit? If I cut power completely to the unit and turn back on the ambient temp starts climbing and the unit will kick back on and cool the boat. Any help would be great!