2018 M3 No heat in first six minutes of drive

[sdrevik]

Temperatures down today to about 12°. For the first seven minutes of the drive, the system would only blow cool air. I fiddled with various different modes, defroster off, AC off, and finally the system started blowing hot air, and ramping up the fan.

Obviously, this is not like an ICE, I don’t have to wait for an engine to come up to operating temperature, it should be in electric heater that comes up to temperature pretty much immediately. Do I need to take my car in for service?

 

[Shelburne]

Probably. I usually begin feeling the warm air after about 2-3 minutes. But I have a pre-heat pump 2020 model. If yours has the heat pump things might be different

 

[dusty22]

Don't know if this is related to your problem. I posted this in another thread...

Heater Not Working Properly on both my Model 3 LR's

Just noticed both my Model 3 and my wife's LR's heating is not working properly, possibly after a recent update. When turning the heating to manual on standard front face air, the heat is no where to be found. I find it's just as cold as setting it to 60 or whatever the lowest temp is. If I put...

teslamotorsclub.com

I was wondering why I had no heat in my 22 M3 LR. I had the middle button ( #3 ) selected (no AC) and cool air blew out of the dash vents. When I pressed the up arrow (above) button or the down arrow (below) button , the heat came out of the selected vents and the dash vents just fine. So, I am beginning to think that Tesla may have changed that middle button to only bring in outside air (no heat) to the dash vents when it is the only button selected.

 

[rotarypower101]

How long/many minutes does it typically take the heat pump to saturate a cold soaked condenser and feel heat on a normal temperature day VS a cold day?

 

[dusty22]

We had a 14 degree F day this morning. Car was in garage at 38 degrees. Backed it outside, tuned heat on and felt it almost immediately. Car fully heated after a few minutes. Drove 7 miles and left it in a parking lot for a couple of hours. I turned the heat on before I left the store. Car was warm by the time I walked to it. Drove to another store but this time I set heat to maintain interior temperature. Came back 1/2 hr later and interior was warm. The heat in the car performed perfectly today. I have a 22 M3 with the heat pump.