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Model 3 Heater Blows Cold Air

CB de Tejas

Member
Jun 19, 2019
5
4
Texas
Bought my Model 3 last June and brought it to South Korea with me and now experiencing my first Winter here. Really frustrated how the heater does not work. I’ve watched YouTube videos explaining how it needs time to heat the battery before the heater blows warm air. I’ve driven it on long trips lately (1 hour minimum) and heater did not kick in at all. Car seat heats up right away but heater blows only cold air. Worse is that the nearest Tesla “service center” is a couple of hours away. Does anyone here have any good advice on this issue? Thanks in advance.
 

Twochewy

Member
Dec 3, 2019
40
29
Seattle
It's a resistance heater that only takes a minute for the warm air to flow, faster than an ICE car. Your HVAC is turned on right? Otherwise, you need to make a service appointment.
 

CB de Tejas

Member
Jun 19, 2019
5
4
Texas
It's a resistance heater that only takes a minute for the warm air to flow, faster than an ICE car. Your HVAC is turned on right? Otherwise, you need to make a service appointment.
It is. I will take it to the Service Center soon to have a look. Thanks for the perspective.
 

640k

Member
Jul 15, 2019
928
623
Cincinnati
what temperature is it set at? without knowing what the cabin temperature is, it's hard to determine if the heater is at fault, or the user.
 

Yragorn

Member
Jun 6, 2019
36
9
Montreal
I have the same issue, I always left my setting at 19Celsius. I have a feeling that from time to time, the cold air is a result of the car diverting the heat to the battery temporarily? When I found cold air coming in, I increased to 23C cabin interior, and heat came back, then I reduced it again to 19C
 

Fresnel

Member
Nov 27, 2019
384
167
USA
The heating system is the biggest thing that I don't like about my 3. I HATE that it blows cold air after reaching the set temp vs lowering to a slow speed of hot air. The solution I use is to leave it on HI but have it set to 1. That usually is enough to keep the temps inside nice without the hot air cold air flip flop that it does. I think you should try setting it to HI and if it doesn't get hot.. there is deff a problem with your system.
 

mongo

Well-Known Member
May 3, 2017
12,865
37,837
Michigan
The 3 (along with S and X) cabin heater is completely separate from the pack heater.
A/C capacity can be diverted to cool the pack though.
 

Occhis

Member
May 26, 2019
198
82
Front Royal, VA
What’s the secret to getting heat on interstate going 75 and outside temp less than 35F. Once I slow below 50 or 55 I get warm air. I keep the fan on auto, though changing fan speed doesn’t seem to do much.
 

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