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AC toggled on vs toggled off

SBD1500

SBD1500

Member
Verified Owner
Joined
May 29, 2023
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92
Cars
2023 Lucid Air Pure
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91B5SVKZ
I understand running the AC affects the range. How about when you run the fan with the AC toggled off? Does that use less energy? How about turning the heat up but AC still toggled on vs toggled off? I usually have the AC ON regardless of I'm keeping car cool or warm.
 
SBD1500 said:
I understand running the AC affects the range. How about when you run the fan with the AC toggled off? Does that use less energy? How about turning the heat up but AC still toggled on vs toggled off? I usually have the AC ON regardless of I'm keeping car cool or warm.
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I would assume that running the fan still takes power to spin it up, so although less power would be used, it still will take some.
 
Along these lines, what is the purpose of the AC button? I am, admittedly, ignorant on EV heating & cooling. On ICE, the heat is pulled from the engine while the compressor (AC) is required to create and push the hot air, right?

But on EVs, doesn't the heat AND the cold need to be created? What does the AC button actually do?
 
Thinjake said:
But on EVs, doesn't the heat AND the cold need to be created? What does the AC button actually do?
Click to expand...
My understanding is turning that off disables both heating and cooling, so all you get is ventilation. I've only ever used that to clear foggy windows on a long drive when I was chasing efficiency.
 
Thinjake said:
On ICE, the heat is pulled from the engine while the compressor (AC) is required to create and push the hot air, right?

I mean, push the COLD air.
Click to expand...
 
segbrk said:
My understanding is turning that off disables both heating and cooling, so all you get is ventilation. I've only ever used that to clear foggy windows on a long drive when I was chasing efficiency.
Click to expand...
Disables the A/C compressor, which has a dehumidification effect. You can increase your efficiency a bit by leaving it off if you don’t need it to keep the windows clear or the cabin cool.
 
On ICE cars, the AC button would just turn the AC compressor on or off (the belt driven thing on the engine that sucks engine power and reduces efficiency). It has nothing to do with heating the car or the blower motor. On an EV, it might or might not improve efficiency, as I believe many EV's use the AC system (among other things) to manage the battery temperature. But I don't know if Lucid's use the AC as part of battery temperature management.
 
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