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A comment on What does this button do? – My new car has a mysterious and undocumented switch.

Re:What does this button do? – My new car has a mysterious a... by m3galinux on Friday November 29, 2024 @06:15PM (#42277972)
Whoever bought my old Honda Fit is asking the same question right now; I installed a button in about the same place. They'll have fun figuring that one out. Honda Fit's AC is designed a lot more for fuel efficiency than effectiveness. So I added a resistor parallel to AC temperature sensor (and the switch inline) which makes the system think it's warmer than it really is, so it cools more. But with the risk of allowing the coil to freeze up. I called it the "AC Boost Switch".
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Re:What does this button do? – My new car has a mysterious a... by Ductapemaster on Friday November 29, 2024 @06:18PM (#42277989)
As a former Fit owner, I wish I had thought of this! The AC was really bad. We did a lot of road trips and it really struggled out on the long desert highway stretches.
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Re:What does this button do? – My new car has a mysterious a... by bentcorner on Friday November 29, 2024 @06:18PM (#42277993)
I'm not doubting your solution but at the same time would turning down the desired temperature in the car achieve the same goal?
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Re:What does this button do? – My new car has a mysterious a... by smitelli on Friday November 29, 2024 @08:14PM (#42278627)
Most automotive A/C compressors are either on or off, with the engine ECU commanding an overriding “off” under hard acceleration or when fuel economy or other situations require an interruption in cooling.

Some older temperature dials actually mixed the cold A/C air with the hot air from the heater core to make those in-between temperatures.

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Re:What does this button do? – My new car has a mysterious a... by snozolli on Saturday November 30, 2024 @11:36AM (#42282421)
Most automotive A/C compressors are either on or off

All AC compressors are either on or off. The compressed gas is gradually released by the TXV. The drop in pressure as the gas exits the TXV is what makes it cold.

Some older temperature dials actually mixed the cold A/C air with the hot air from the heater

What vehicles don't do this?

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Re:What does this button do? – My new car has a mysterious a... by m3galinux on Friday November 29, 2024 @06:30PM (#42278051)
Didn't help. With AC on maximum it'd still "turn off" early. Honda claimed working as designed.
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