After driving from Vancouver to Kelowna in our new Y (two weeks old), our heating failed halfway home, resulting in us having to drive 4 hours with no heat at all. Temperatures were between -5 and -7 Celcius in the car and about -20C outside. Same error message VCFRONT _a447 as other Model 3 and Model Y owners. Our issues was after the recent 2021.44.25.2 update, but not clear if it is limited to the new version.
Just received the following message from Service:
"This is a firmware issue currently under investigation by Tesla as it was recently discovered due to the recent extreme cold climates. There will be improvements with future firmware update as it is currently being developed. Current mitigations are to precondition the vehicle 30-60 min prior to departure, use recirculating air model and use auto mode. Symptoms may still occur when driving in climates -15C and below. If heat does not return please park vehicle in a warmer location and allow vehicle to warm up. '
And "A fix is currently being developed by the software engineering team, and there is no ETA on the firmware version fix."
Just received the following message from Service:
"This is a firmware issue currently under investigation by Tesla as it was recently discovered due to the recent extreme cold climates. There will be improvements with future firmware update as it is currently being developed. Current mitigations are to precondition the vehicle 30-60 min prior to departure, use recirculating air model and use auto mode. Symptoms may still occur when driving in climates -15C and below. If heat does not return please park vehicle in a warmer location and allow vehicle to warm up. '
And "A fix is currently being developed by the software engineering team, and there is no ETA on the firmware version fix."