Method for operating a vehicle temperature control system, wherein the vehicle temperature control system comprises: - a vehicle data bus, - a blower control unit in data exchange connection with the vehicle data bus for generating actuating commands at least for at least one vehicle blower, - an air-conditioning control unit in data exchange connection with the vehicle data bus for generating actuating commands at least for at least one, preferably a plurality of, air flow influencing units, wherein the air-conditioning control unit is configured to receive actuating commands generated by the blower control unit at least for at least one vehicle blower via the vehicle data bus and to actuate the at least one vehicle blower corresponding to the actuating commands received, - a preferably fuel-operated vehicle heater for providing heat to be transferred to the air to be introduced into a vehicle interior, wherein an operating device for inputting or/and generating information defining a heating operation to be carried out is associated with the vehicle heater, wherein the vehicle heater is in actuating connection with the blower control unit, and - a vehicle data bus separation unit for separating the vehicle data bus such that a partial vehicle data bus permitting the data exchange connection between the blower control unit and the air-conditioning control unit is provided, wherein the vehicle data bus separation unit is in actuating connection with the blower control unit, in which method after activating the vehicle heater: a) the vehicle heater sends an activation actuating command to the blower control unit, b) the blower control unit sends a vehicle data bus separation command to the vehicle data bus separation unit in response to the receipt of the activation actuating command from the vehicle heater, c) the vehicle data bus separation unit separates the vehicle data bus for providing the partial vehicle data bus in response to the receipt of the vehicle data bus separation command from the blower control unit, d) the blower control unit sends an activation actuating command to the air-conditioning control unit after providing the partial vehicle data bus, e) the air-conditioning control unit puts at least one vehicle blower or/and at least one air flow influencing unit into a specified operating state in response to the receipt of the activation actuating command from the blower control unit. - a vehicle data bus, - a blower control unit in data exchange connection with the vehicle data bus for generating actuating commands at least for at least one vehicle blower, - an air-conditioning control unit in data exchange connection with the vehicle data bus for generating actuating commands at least for at least one, preferably a plurality of, air flow influencing units, wherein the air-conditioning control unit is configured to receive actuating commands generated by the blower control unit at least for at least one vehicle blower via the vehicle data bus and to actuate the at least one vehicle blower corresponding to the actuating commands received, - a preferably fuel-operated vehicle heater for providing heat to be transferred to the air to be introduced into a vehicle interior, wherein an operating device for inputting or/and generating information defining a heating operation to be carried out is associated with the vehicle heater, wherein the vehicle heater is in actuating connection with the blower control unit, and - a vehicle data bus separation unit for separating the vehicle data bus such that a partial vehicle data bus permitting the data exchange connection between the blower control unit and the air-conditioning control unit is provided, wherein the vehicle data bus separation unit is in actuating connection with the blower control unit, a) the vehicle heater sends an activation actuating command to the blower control unit, b) the blower control unit sends a vehicle data bus separation command to the vehicle data bus separation unit in response to the receipt of the activation actuating command from the vehicle heater, c) the vehicle data bus separation unit separates the vehicle data bus for providing the partial vehicle data bus in response to the receipt of the vehicle data bus separation command from the blower control unit, d) the blower control unit sends an activation actuating command to the air-conditioning control unit after providing the partial vehicle data bus, e) the air-conditioning control unit puts at least one vehicle blower or/and at least one air flow influencing unit into a specified operating state in response to the receipt of the activation actuating command from the blower control unit.