Climate Control (I35)

Your best bet is to use the windshield & floor setting on the manual controls. At least on my '97 that did not turn on the AC. I don't think there is any way to cut the AC from the windshield only setting.

Your only Nissan choice is heat to the windshield and floor simultaneously. Note that when it gets severely cold (< 20F), the system automatically directs some heat to the windshield even if you have the system set for all heat to the floor.

Shoot -- JimV is right. Below a certain temperature, the compressor automatically disengages when you choose defroster. I just don't recall what that temperature might be. Perhaps it's in our owners manuals.

Yes,I believe that the owner's manual mentions 27 degrees as the cutoff point for the compressor.I was hoping,though,to do it at any temp.

Who knows? I might ask around about the possibility of pulling one or more fuses.

Thanks!

Read on a Chevy board that defroster activation of the AC is to keep the seals in the compressor lubricated during the off-season. Makes sense.

"> Yes,I believe that the owner's manual mentions 27 degrees as the

My 626 AC cuts off at 32 deg F.

You need to run the a/c compressor 10 minutes every week or so, to keep the seals lubricated & prevent leaks. Don't disable the compressor in a manner that will discourage you from doing this, or it will be a very false economy that you are pursuing.

JM

AC also helps defrosts the windshield almost instantly, when the temp is above freezing point, compared to no AC and only heat.