Now that the weather is starting to get colder, I am finding the windshield fogging up more. To stop the windshield fogging up, I like to use the fan vents in the mode I show above - foot vents and window. The downside is this disables Auto-Stop, as this falls under using the Window defroster, one of the conditions in the manual that disables auto stop. Auto stop saves a lot of gas, so I want to use it whenever I can. I guess the feeling behind this is it works better when there is the extra heat from the running engine to help defrost the windows, but once it has warmed up, this isn't necessary at all.

Is it possible to cut a wire somewhere or mod something so auto-stop will still work with the window defroster? A workaround I use is once it's defrosted I use the Air Conditioning with the fans in front vents and foot vents mode, which removes the moisture in the cabin and stops the windows fogging up, but using the air conditioning all the time is hurting my fuel economy.

This morning I was literally toggling between the two fan modes to get the auto-stop to work as I came up to a red light - really annoying!

 

Don't know the answer, but it pretty much comes down to a choice... do you want clear windows, OR do you want better mileage?