Heat-pump recall and refrigerant sensors (22V-050)moderate
Recall 22V-050 covers 2021-2022 Model 3: a software error could let a valve in the heat pump open and trap refrigerant, reducing windshield defrosting — fixed by an over-the-air update. Separately, manufacturer communications flag that the heat-pump refrigerant pressure/temperature sensors on 2021 cars can fault over time, which can affect cabin heating and, in some builds, throw braking/stability alerts from a missing wake-up wire. Confirm the recall software is installed, and on a cold-climate car test the heat and defrost.
Sources: NHTSA complaint database, 2021 Tesla Model 3 · NHTSA recall campaigns (22V-050, 24V-554, 21V-835, 21V-834, 22V-317, 23V-838) and manufacturer communications (heat-pump sensors)
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Recall remedy (software)