The 1964 Cadillac Comfort Control

An integrated heating and air conditioning system that would automatically bring the passenger compartment to a comfortable temperature and maintain this temperature under all climatic and engine operating conditions has long been a goal of many automotive engineers in this field. Fulfillment of this objective was realized with the introduction of the Comfort Control system on the 1964 Cadillac. This paper presents a brief history of General Motors’ experience with automatic climate controls, describes the preliminary design and development of the Cadillac system, and explains how the Comfort Control system operates.