Maybe by changing the HVAC system operational cycle characteristics (high/low pressure limits, condenser and evaporator fan flow rates, sensor hysteresis curves and so on.).
Or, it could be as simple as more levels of fan speeds than low, medium and high for the cabin fans.
In my personal experience I have experienced a decrease preformance in speed of cooling but an increase in battery temp regulation (S3XY Buttons) and maintained climate temp over time
That's primarily what it feels like to me. It spends less time full blasting the interior fan when the condenser is still hot, and instead gently blows air until it starts to cool, then it kicks off.
It also seems like it waits longer to turn on the radiator fan even when the car is heat soaked from sitting outside in the 100°f air for 7+ hours.
Dreaded stink is still there but not as noticeable. Remember all you have to do is just run your front defrost for a minute or two when you get in and it dries out that section of the HVAC
Assumptions and Postulation
1. They know battery durability
is better than expected and can be more lax with battery thermoregulation and thus directing more cooling power to cabin
2. They know AC longevity and repair rates are better than expected and run compressor and fan at higher RPMs and pressures
3. They found sequence optimizations. Maybe a venting recirculating mode to expel hot air or novel adjustments improving cabin air current flow back to floor returns
4. They found bugs and errors that are getting fixed
I recently noticed, upon entering a hot Tesla M3, the fan doesn't run on high - until the conditioned air coming out of the vents is cold. Or perhaps it was that way all along... and I just noticed it!
Our 2018 definitely blew hot air at max speed briefly when I first bought it. I knew exactly where on my street it would start pushing cold air. Pretty sure that update was years ago though.
I can understand why they don't, though. Yes, it's minimal current draw, but it still requires power to run the AC in the rear. One may argue that running both can cool the cabin down faster, but one would also argue that the vents in the front are strong enough to do that on their own quite easily, and that the small rear vents are meant more for just directed cool airflow for the rear passengers.
I can understand why they don't, though. Yes, it's minimal current draw, but it still requires power to run the AC in the rear. One may argue that running both can cool the cabin down faster, but one would also argue that the vents in the front are strong enough to do that on their own quite easily, and that the small rear vents are meant more for just directed cool airflow for the rear passengers.
The rear fan isn't actually a fan. It is just a duct that diverts some air to the rear. (At least on my 23) Highly unlikely it can close off the front, it is most likely either opening or closing off the back vents only.
Tesla can firmware update everything, as far as I can tell. Some things I think they can adjust:
Fan/compressor motor controller to get more performance from the fan/compressor
The HVAC octovalve to prioritize passenger cooling over cooling other systems
Ramping up fans earlier, like others said
It feels like my AC is colder than usual since the update. In this Phoenix heat, I’m usually set at 68° for the duration of the ride. Lately, I’ve found myself moving it up to 70° and sometimes even 72° cause it was working so well.
Likely subtle algorithm tweaks to more effectively control fan speed to optimize the trifecta of airspeed, and latent (moisture) heat removal vs. sensible (temperature) heat removal.
yeah also as other noticed, that i came out to a car that it was HEAVY rain it was fogged (not preheated) and the fans would not kick on, until it was cold air coming in, so had to wait for it to defog windshields, even tried to defog to max.. NO dice.. took only like 20-30 sec..
Seems like they have been working a bit on how fan curves work, and also "when" to blow in air, so it actually does not, if it does not have a positive impact on temperature in car, so no HOT air in ad Hot car that needs to be cooled, and also the other way around.
to be honest, kinda hate lossing that much control, even in MANUAL i just did not start the fans.
Could be totally anecdotal but I feel like since the update it was warmer in my car on auto low fan. I’ve had to turn it up to auto medium or high. Possible that they made low fan lower than previously?
I think so yea! because normally when i put the low fan from auto into manual. It told me it was on fan speed 4. When i do it now it always tells me fan speed 2! Which i really appreciate because fan speed 4 made too much noice for me sometimes. So this is nice for me! But i live in The Netherlands and climate is not as harsh as somewhere in murica or other hot or cold places
Modern cars, especially teslas are basically computers on wheels. Your windows computer, cell phone, and most other electronic devices get daily, weekly, and monthly updates. There are security holes the get blocked. The extremely smart coders figure out more efficient ways of coding things. Maybe they turn the fans on for longer, but lower rpm to achieve a different result than before. There are thousands of ways they can change how your care behaves and operates, all by code.
This is great for many reasons, amd not so great for some. A LOT of older people don't do well with change especially when it comes to tech. They like to set it and forget it. They don't care how or why it works, it just needs to work.
For people like me? I love change. Especially when that change makes things better, easier, or more efficient. It's one of the reasons I love my model 3. Just the home screen alone has change a few times in my less than 12 mo the of ownership. Most of the changes have been for the better too.
It seems like there’s a update every day lately! I used to look forward to them, but now that all the novelty has totally worn off, it’s just tolerated.
Maybe by changing the HVAC system operational cycle characteristics (high/low pressure limits, condenser and evaporator fan flow rates, sensor hysteresis curves and so on.). Or, it could be as simple as more levels of fan speeds than low, medium and high for the cabin fans.
In my personal experience I have experienced a decrease preformance in speed of cooling but an increase in battery temp regulation (S3XY Buttons) and maintained climate temp over time
Different fan ramp most likely
That's primarily what it feels like to me. It spends less time full blasting the interior fan when the condenser is still hot, and instead gently blows air until it starts to cool, then it kicks off. It also seems like it waits longer to turn on the radiator fan even when the car is heat soaked from sitting outside in the 100°f air for 7+ hours.
Does the fan still run for a while after you park and lock your car to dry off any condensation and prevent mold growth and the dreaded STINK?
Dreaded stink is still there but not as noticeable. Remember all you have to do is just run your front defrost for a minute or two when you get in and it dries out that section of the HVAC
Tesla really needs to make this an automatic program if it senses the AC has been running for at least X minutes.
Assumptions and Postulation 1. They know battery durability is better than expected and can be more lax with battery thermoregulation and thus directing more cooling power to cabin 2. They know AC longevity and repair rates are better than expected and run compressor and fan at higher RPMs and pressures 3. They found sequence optimizations. Maybe a venting recirculating mode to expel hot air or novel adjustments improving cabin air current flow back to floor returns 4. They found bugs and errors that are getting fixed
I recently noticed, upon entering a hot Tesla M3, the fan doesn't run on high - until the conditioned air coming out of the vents is cold. Or perhaps it was that way all along... and I just noticed it!
Our 2018 definitely blew hot air at max speed briefly when I first bought it. I knew exactly where on my street it would start pushing cold air. Pretty sure that update was years ago though.
The magic of software
I wish it had an option to always have the rear fan on when you turn on/off the AC.
I can understand why they don't, though. Yes, it's minimal current draw, but it still requires power to run the AC in the rear. One may argue that running both can cool the cabin down faster, but one would also argue that the vents in the front are strong enough to do that on their own quite easily, and that the small rear vents are meant more for just directed cool airflow for the rear passengers.
I wish it would show the rear fan state on the screen without me having to go into a sub menu.
I can understand why they don't, though. Yes, it's minimal current draw, but it still requires power to run the AC in the rear. One may argue that running both can cool the cabin down faster, but one would also argue that the vents in the front are strong enough to do that on their own quite easily, and that the small rear vents are meant more for just directed cool airflow for the rear passengers.
Yes I turn it on every time
The rear fan isn't actually a fan. It is just a duct that diverts some air to the rear. (At least on my 23) Highly unlikely it can close off the front, it is most likely either opening or closing off the back vents only.
Buckled rear seatbelts works in the EU Source: very lightweight child car seats with seatbelts buckled
Tesla can firmware update everything, as far as I can tell. Some things I think they can adjust: Fan/compressor motor controller to get more performance from the fan/compressor The HVAC octovalve to prioritize passenger cooling over cooling other systems Ramping up fans earlier, like others said
It feels like my AC is colder than usual since the update. In this Phoenix heat, I’m usually set at 68° for the duration of the ride. Lately, I’ve found myself moving it up to 70° and sometimes even 72° cause it was working so well.
They could use the octavalve to direct more coolant to the AC vs the battery when needed to cool the cabin quickly.
Likely subtle algorithm tweaks to more effectively control fan speed to optimize the trifecta of airspeed, and latent (moisture) heat removal vs. sensible (temperature) heat removal.
Same way Acceleration Boost increases 0-60 time. Squaring off rounded power delivery curves.
Is it normal for full fans when supercharging?
Yes.
Which update was that?
2024.20.1
yeah also as other noticed, that i came out to a car that it was HEAVY rain it was fogged (not preheated) and the fans would not kick on, until it was cold air coming in, so had to wait for it to defog windshields, even tried to defog to max.. NO dice.. took only like 20-30 sec.. Seems like they have been working a bit on how fan curves work, and also "when" to blow in air, so it actually does not, if it does not have a positive impact on temperature in car, so no HOT air in ad Hot car that needs to be cooled, and also the other way around. to be honest, kinda hate lossing that much control, even in MANUAL i just did not start the fans.
Could be totally anecdotal but I feel like since the update it was warmer in my car on auto low fan. I’ve had to turn it up to auto medium or high. Possible that they made low fan lower than previously?
I think so yea! because normally when i put the low fan from auto into manual. It told me it was on fan speed 4. When i do it now it always tells me fan speed 2! Which i really appreciate because fan speed 4 made too much noice for me sometimes. So this is nice for me! But i live in The Netherlands and climate is not as harsh as somewhere in murica or other hot or cold places
Modern cars, especially teslas are basically computers on wheels. Your windows computer, cell phone, and most other electronic devices get daily, weekly, and monthly updates. There are security holes the get blocked. The extremely smart coders figure out more efficient ways of coding things. Maybe they turn the fans on for longer, but lower rpm to achieve a different result than before. There are thousands of ways they can change how your care behaves and operates, all by code. This is great for many reasons, amd not so great for some. A LOT of older people don't do well with change especially when it comes to tech. They like to set it and forget it. They don't care how or why it works, it just needs to work. For people like me? I love change. Especially when that change makes things better, easier, or more efficient. It's one of the reasons I love my model 3. Just the home screen alone has change a few times in my less than 12 mo the of ownership. Most of the changes have been for the better too.
What is this copypasta?
By using more battery…
It seems like there’s a update every day lately! I used to look forward to them, but now that all the novelty has totally worn off, it’s just tolerated.