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

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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