（Cover image source: LotGain）
Greentheonly tweeted that he feels regretful about Tesla’s failure to report the air conditioning problem and the exact date of repair is still unknown.
Tesla has changed its approach to this problem from “repair after customer complaints” to “comprehensive silent recall.” Tesla basically acknowledges that the air conditioning sensor will be damaged during normal use.
Last year, Tesla adopted the latest heat pump system in its Model 3/Y cars. Ma Yilong boasted online, “The heat pump in Model Y is one of the best engineering designs I’ve seen in recent times.”
However, as new cars equipped with heat pump systems go on sale and the northern hemisphere enters winter with a dramatic drop in temperature, there has been a continuous stream of feedback from new car owners both in China and abroad, that the Model 3/Y equipped with heat pump systems has malfunctioned and cannot provide heating. This has left many car owners with no choice but to keep warm by wrapping themselves in blankets. Some car owners even reported that the air conditioning cannot be cooled. Tesla’s official website has not made any comments on this issue.
Here, we would like to mention Tesla’s heating technology route, which uses a dual approach of heat pump air conditioning and PTC electric auxiliary heating because PTC technology has poor energy performance in electric vehicles.
When the outside temperature drops below 0 degrees Celsius, the heat pump heat exchanger surface may be frosted, reducing the heat exchange efficiency. So Tesla added a 12 V PTC to assist in heating.
What is receiving more attention is the algorithm that runs these two systems. This algorithm can directly control the motor and compressor to carry out heating at ultra-low temperatures using different algorithms, ensuring optimum efficiency output.
In North America, Tesla customers have repaired this problem through OTA. Therefore, the upgrade project for this recall is likely not limited to hardware replacement such as “air conditioning sensors.”
🔗 Information source: Twitter@greentheonly
This article is a translation by ChatGPT of a Chinese report from 42HOW. If you have any questions about it, please email bd@42how.com.