I am a new owner of a G35. Is there a way to operate the fan speed from low to high with out it engaging the AC when depressed in the manual mode? Please advise

Every time I set the mode to manual for outside or inside air flow and I attempt to raise the fan speed with the + and - control button, my AC comes on.

 

I believe the AC comes on in manual based on the temp setting, however it does seem to have a default to come on most any way I've tried it. Try setting the temp much higher than the cabin temp and see if it still comes on. If it does then you will have to manually push AC to shut it off it you want to. If it doesn't you'll still have to play around with the temp which you won't likely want to do anyway just to turn it off.

 

Just because the AC light is on doesn't mean the AC is operating (cooling). The light just means that the AC compresser is available to the defroster for dehumidification of the intake air. If you shut it off the defroster can blow humid air on the windows and fog them even worse.

Don't fight the system, it's smart enough to know that if the ambient inside temperature is lower than the requested temperature, the AC will not cool even if the light is on.

I wish I could convince my wife of this - the AC light in winter drives her nuts and she keeps shutting it off. She also seems to think that the higher you set the temperature, the faster it will warm up.

 

haha.. didn't know my wife had a twin

 

If I had a dollar for every person I know who does this, even with their home or work thermostats I would be a rich man.

 

I'd like to know why can't you have the heat and air being circulated? Once the heater is on, the only option is for outside air. If you want to circulate air, the AC automatically comes on although the temp is set at 75F. Say you're driving during winter with heater on and you're following a car blowing smoke, it would be nice to circulate air while keeping the heater on.

 

If you use recirculated air you're putting warm humid air onto cold windows. The the longer you recirculate, the more humid the air gets - the result being fogged windows. The climate control system will dehumidify the intake air with the AC system, then heat it, keeping your windows clearer, or clearing them faster.

The other reason is that if you use recirculated air you have to smell your own farts longer.

 

haha there is a window to deal with that.