A high limit thermostat for gas furnace applications is shown having a molded base plate and an elongated housing formed integrally with the base plate which mounts a thermostat at a free end of the housing in order to be positioned within an air stream of a heat exchanger to sense temperature conditions of the air stream. An extended version is shown in which one end of a pair of elongated terminals are received in slots formed in the housing with the thermostat mounted on the opposites ends of the elongated terminals.