[mbrac]

I'm going to open the hood - and check to see if the AC compressor engages when the defrost is selected - the only real way to see if the AC is really being "turned on" when in the drfrost mode - I also do have an AC switch - but that might not come into play in the dfrost mode - maybe only the Vent mode - only way to know for sure there is to get it from engineers at Ford - as to how they designed it to work. If it does engage in the drfrost mode - I too will unplug the connector to the compressor for the winter months - and make a note to plug it in and exercise the compressor once a month or so - will post findings -