I've searched and can't find anything quite like this issue, so maybe someone can supply at least a clue.
Last Thursday I drove to Rochester, NY (82 miles) and climate control (CC) worked fine. Mid-afternoon I went on errands and all was okay.
Overnight, about 2 inches of snow fell but as I had nowhere I needed to be, the car sat all day Friday. It was outside, partially protected by a maple tree. But this is not abnormal as the car is outside year-round (no garage) and has been through 2 previous Winters with no problems. On Saturday I cleaned off what was left on the car and headed out on errands. No CC at all.
When I say no CC, I mean ... no heated seats, no heated wheel, no defroster (front or rear or mirrors). Nothing. However, switches and stack screen indications were all as they should be with one exception. When trying to activate heated steering from the CC screen, pressing the on/off had no results and the indicator on that button remained gray, not the red it would be if it was working.
Soooo, on my way around the area, I stopped at the dealer, hoping that perhaps it might be a quick fix - fuse or something. They believe it's not necessarily that but another issue. I made an appointment for this coming Saturday to get it looked at and braced for a VERY chilly week without comforts.
As of Sunday past, everything is working fine. Just like nothing happened. <sigh> I am going to keep the appointment and see if they can find something but also thought maybe someone here has seen this. Since returning to normal, things have been fine.
Edited by Cobra348, 20 November 2018 - 10:15 AM.