I have a 97 maxima gle with auto climate control. I have noticed considerable condensation under my car and I am running the heater. Its definitley condensation but whats causing it? Does the AC run in the heat mode? Thnk you for responses.
Smackman the king of smack.
97 gle 191000 miles and still rolling

 

Yes - when you run in AUTO mode, the A/C runs to help eliminate humidity from inside the car (this is how defrost mode works too).

 

In the winter I use the Econ mode because in Auto it runs the a/c compressor, which I dont need.