For the first time I rotate the temp dial of the a/c. From then on I temperature change from heat to cool without changing the dial again. I turned on/off but still had the problem. What could be?
Are you using ECO mode? When driving with ECO mode on, the car will turn the AC off temporarily whenever it needs more power, such as under heavy acceleration. But it should turn back on as soon as you lift your foot up a bit on the gas pedal.