Ambient temperature control for absorption refrigerator

A ventilation system for an appliance having a condenser, an absorber, and a heat generator, being located in a recreational vehicle slide-out room having a refrigerator installed inside the slide-out room of the recreational vehicle, the refrigerator having a rear wall which is spaced from the rear wall of the slide-out room;

• the slide out room also having a floor, exterior side walls, and a roof, said ventilation system comprising:
• a generally vertical air passage for passing air over the absorber, the condenser and the heat generator, the vertical air passage extending vertically and is formed by the space between the rear wall of the refrigerator and the side walls of the slide-out room;
• a lower vent communicating the air passage with ambient air surrounding the vehicle;
• an upper vent communicating the air passage with ambient air surrounding the vehicle;
• and
• an air assist system including a blower in the vertical air passage to promote air flow within the air passage over the condenser, the absorber, and the heat generator when energized and a thermal controller positioned to sense ambient temperature to control said blower, wherein said thermal controller is adapted to control power provided to said blower when the sensed ambient temperature is above a predetermined value below which natural draft airflow through said vertical passage sufficiently cools the condenser and above which natural draft airflow through said vertical passage does not sufficiently cool the condenser.