HVAC
3 article(s) on «HVAC». Sorted by severity — most severe first.
Model 3 pre-refresh: cabin PTC heater failure
A common failure of the cabin PTC heater on Model 3 cars built before the heat pump (accelerated by a clogged filter and constant running at maximum). How to choose a replacement: genuine, used, or a Chinese copy.
Tesla Model 3/Y no heat in winter: 2021 heat-pump problems, PT-sensor recall, fixes (2026)
Why early 2021 Model 3 and Model Y refresh cars lose heat in heavy frost: PT-temperature-sensor failures in the heat pump, octovalve / supermanifold mechanical issues, the Tesla service-bulletin replacement of three PT-sensors, and what the firmware updates closing 'stuck' valve positions actually do. Symptoms, repair scope, typical cost.
M3/Y: AC compressor failure (Hanon vs Denso, replacement and recharge)
The electric AC compressor on Model 3/Y dies from overheating, clogged condenser and wear. Hanon vs Denso, signs of failure, prices for new vs used in Belarus.