Twice now my heater fan has not worked in cold weather - the time when it is most critical. Anybody else having this problem. My dealer says they have had similar complaints on O4 vehicles, but this is their first for the Tundra. It seems that if it drops to -35 degrees celsius (-31 F) or colder my fan does not work and it is not a fuse. The dealer is not sure if Toyota is going to do anything about this, but this is a real safety issue in winter. The temp was -36 C on the weekend and I had to drive 3.5 hours home from the cabin with no heat. Anybody have any insight into what the problem could be, the dealer is puzzled as well.