While driving last night I noticed the passenger side temperature control operating sluggishly. It would not change the temp one "click" at a time but needed to be spun fairly rapidly for it to change the temperature indicator at all. If I switched to Sync it worked fine adjusting the temperature from the driver control. Any ideas?

 

True to form, I went for a ride this morning and everything is functioning as normal. I anticipate the issue to revisit on my afternoon errands run.