I live in the San Francisco Bay Area. It is very common to drive from 80 degree weather just outside the city to 65 degree weather once I'm in the cold, foggy city.
I leave my MX climate control on Auto at all times and I tend to keep my temperature on 68-70 degrees.
I've noticed that when I drive from a hot to cold area that the car will suddenly start heating the interior. In the opposite direction, going from cold to hot, the car's climate control will immediately start blowing cold air.
The interior temperature does not change that quickly to warrant these annoying changes in the climate control and I find I have to constantly be adjusting the temperature.
My typical day driving the MX around is like "Why in the heck is my car heater on? Oops, looks like I just drove over the bridge and the external temp has dropped 20 degrees... time to F around with the climate control temperature to find the optimal temperature!"
Does anyone know why the car does this? I would think a climate control system would measure the interior temperature of the car. However, judging from what is happening, it seems to be measuring the external temperature or perhaps the temperature of the air coming into the car.
Thanks for any help to understand this "feature" of my car.