Method for controlling an air-conditioning and/or heating system

A method for controlling a system for air conditioning and/or heating an inside air stream intended to be sent to a passenger compartment of a vehicle, said system comprising a loop for the circulation of a refrigerant, said loop including:

• a first heat exchanger between the refrigerant and the inside air stream for cooling said inside air stream,
• a second heat exchanger between the refrigerant and the inside air stream or a heat transfer fluid for heating said inside air stream, situated downstream of the first heat exchanger in the direction of circulation of the inside air stream,
• said method comprising selecting a mode for dehumidifying the inside air stream from a plurality of dehumidification modes, said selecting being implemented on the basis of maps, produced in advance, of at least three parameters of the system, referred to as humidity control parameters, selected from an actual temperature of the inside air stream upstream of the first heat exchanger, a temperature setpoint downstream of the second heat exchanger, a temperature setpoint downstream of the first exchanger, a flow rate of said inside air stream through the first exchanger, an ambient temperature of the air and a humidity of the air.