Why does my car's engine race high when the fan/ac is on in the defrost position?
I've noticed when I run my car's air conditioner (at any time) or when the AC or just the fan is on and it's set to defrost (the air is directed to the windshield) my engine races when I press the clutch to shift gears. I don't have a tachometer, but I'd guess it races 600-1000 RPM too fast.
Another, possibly related, symptom is the heater will blow warm air after a few minutes of the engine running, but the heat seems to last for only about 20 minutes and the air gets significantly cooler. It also seems to lose heat if I change any setting related to it...fan speed, vent direction (feet to face, etc.). It will sometimes get warm again, but not always.
Thanks, I know this is a slightly off the wall question. I appreciate any help you can provide.
In Maintenance & Repair > Heating / Cooling > Defroster
1 answer - 41 days ago
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