It was Valentines Day. It was a rainy cold day so I turned on all the vents, turned the dial heat 100% and the vent speed 100% only for the vehicle to drain my coolant and the vehicle heated up all the way! The computer flashed a warning and advised to pull over and turn off the engine immediately. I looked under the hood and found out there was no coolant. I turned off the heater and filled the coolant then the vehicle started working fine the next day. However, the vehicle still leaks coolant, albeit a little, I have already purchased 3 coolant gallons, I pour a little coolant here and there and I routinely check to see if my car has coolant.