09-23-2020, 06:51 PM | #1 |
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RPM increasing when closing AC
Car’s idling at 500r then if I close it it goes to 1000rpm then goes back to 500rpm..
Is this normal? I’ve seen that it’s due to more « load » on the car! Is it true? Thanks!! |
09-23-2020, 08:05 PM | #2 |
Car Hypochondriac
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Drives: 2014 335i M-Sport Estoril Blue
Join Date: Feb 2017
Location: Sterling, VA
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If you turn on AC, there is more load on the engine because the AC compressor is driven by the accessory belt.
Sometimes when turning the AC off, the idle rises a bit because it no longer has to work as hard to maintain steady idle. It then settles back to normal idle RPM.
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