Software Upgrade 2021.44.30.6 must have had issues - only lasted for less than 48 hrs

[rexki]

Software Upgrade 2021.44.30.6 must have had issues - only lasted for less than 48 hrs ??

2021.44.3.7 downloading and installing now - bets on its life?

 

[qdeathstar]

Cool

 

[Boza]

.8 is already out
Welcome to continuous deployment in critical systems software!

 

[smogne41]

Well, the heat pumps appear to be eating themselves. So they are desperately trying fix that.

https://twitter.com/x/status/1482464674264326146

 

[Sporty]

This makes a little more sense. Try to work around a hardware problem with a software update.

 

[Boza]

That was super informative and could explain the heat pump issues affecting mostly customers in very cold climate where the refrigerant cannot heat enough to evaporate.
Heat pumps sound like a good idea (they are) but they have limitations. For example, a lot of split AC systems can function both as coolers and heaters. However, they have limitations on the delta of temperatures. If it is too cold outside they cannot sufficiently heat up the house. But, they have sensors and shut down if liquid reaches the compressor.
I would venture to guess that Tesla did not do sufficient testing in cold climate. The firmware updates may be related to calibrating the sensors and the rest of the system in attempt to avoid liquid reaching the compressor. I hope they are not trying to “power through” the issue by trying to move heat even if liquid reaches the compressor…
It is also possible that they used wrong refrigerant and need something with lower boiling point.

 

[Sporty]

Is there a backup heating element that kicks in when the operating range is outside of what the heat pump can manage?

 

[Boza]

No, MY and M3 rely on the heat pump; no traditional heating elements. Wondering if that has negative effect on the battery and regen ability.