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Heating failures reported on Tesla Model 3 and Model Y – is it the heat pump?

In various forums around the world, users are currently complaining about a new problem in connection with the newly delivered Tesla Model 3 and Model Y: The heating suddenly fails at low temperatures and while driving. It is noticeable that the fan continues to work, but the air flowing out remains cold. In an English-language forum it was reported that there were frequent cases in Europe. In a German forum, on the other hand, it is said that there are countless cases in the USA.

Software or a sensor replacement could help

A handful of reports on the cold problem can also be found in the Tesla forum itself. European Tesla drivers from Norway, Great Britain and Switzerland reported that they had heating problems with Model 3 in the Long Range variant, which was refreshed in mid-October.

There is intense speculation about the source of the error in German-speaking forums as well as in English. When viewing the contributions, the assumptions ranged from technical problems with a sensor and software restrictions to possible problems with the heat pump first introduced by Tesla in the Model Y and then also in the Model 3. It is noticeable that apparently almost only vehicles are affected that have currently been delivered and have the new feature. Model Y are also among them, but in particular drivers of Model 3 LR reported. However, owners of the performance variant also state that they are affected.

In some cases it is reported that initial appointments were made at Tesla service centers; Diagnoses there should indicate problems in connection with sensors for the heat pump. There are two sensors (PT sensor, high pressure, part number 1510047-00-B, and PT sensor, low pressure, part number: 1510048-00-B), which in some cases would provide incorrect data, which leads to malfunctions. Some Tesla drivers reported that the 2020.44.25 software update had solved the problem, although the service centers still consider it necessary to replace the sensors. As of Tuesday, no cases were documented in which the sensors were changed.

Tesla does not comment on request

It is not currently possible to predict exactly what extent the reported heating problems will be. It doesn’t seem extreme, however. Because sometimes there are software problems after Tesla updates – and then you can read a lot more about it on the Internet than currently about cold interiors. With increasing deliveries of Teslas with heat pumps and further sinking temperatures, the number of cases could increase. What speaks against the heat pump theory, however, is that individual Model 3 SR + that are not equipped with the more efficient heating system should also be affected. A request from teslamag.de to Tesla on the subject initially went unanswered.

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