HEAT EXCHANGER OF AN AIR-CONDITIONING AND HEATING DEVICE, IN PARTICULAR OF A MOTOR VEHICLE

The invention relates to a heat exchanger (1) for a motor vehicle air conditioning and heating device that is capable of operating in heat pump mode, characterized in that it is equipped with: - a first sensor (11) capable of measuring the temperature of a wall of said heat exchanger (1), - a second sensor (12) capable of measuring the relative humidity and the temperature of the ambient air.