Climate control - car hot but still blowing full heat after 20 miles

Hi Guys,

I know auto climate control will blow hot until car is warm but mine just blows hot all the time. Windscreen gets hot with all the hot air (so do my feet!).

If I turn the temperature down to cold it flips to blowing freezing cold air (at around the 18 degree mark on the dial).

I’ve removed the glove box and can see the air ducts behind the panel. As I move the temperature knob I can see that the flaps in the ducts flip from one extreme to the other.

The local Mazda dealer doesn’t know what the problem is either and nothing showing on diagnostics monitor.

Anyone seen this before or know where the thermostat hides?

Thanks,

Jon