Audi q3 has hot coolant and not hot air conditioner.

Your good friend, as you said, was caused by the blockage of the heater tank. Or the antifreeze in the water tank is insufficient. This will cause the warm air not to be hot. BBA Mercedes-Benz BMW Audi car wishes you a happy life! Health and safety! The financial resources are rolling! If there is something wrong with the car, ask the car master. 4S shop professional technician, 10 minutes to solve.