Control method for integrated thermal management system of vehicle

A non-transitory computer readable medium containing program instructions executed by a processor, the computer readable medium comprising:

• program instructions that compare an engine coolant temperature with a predetermined first set temperature after vehicle start;
• program instructions that, when the engine coolant temperature is greater than the first set temperature, compare an ambient temperature with a set ambient temperature and compare an air conditioner refrigerant pressure with a set pressure;
• and
• program instructions that, when the ambient temperature is greater than the set ambient temperature and the air conditioner refrigerant pressure is greater than the set pressure, control opening and closing operations of an integrated flow control valve based on the air conditioner refrigerant pressure so as to increase a flow rate of coolant that is supplied to a radiator through the integrated flow control valve.