Automotive/AC won't shut off

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Expert: Sean Halliday - 7/16/2007


Question
My air conditioner won't shut off even when the car is turned off. I can only get it to shut off when the battery cable is off. I have a 2001 Mercedes E320 4matic. What can this be.

Answer
How do you mean the A/C compressor or the fan?The compressor must shut off as it is driven by the fan belt.If it is your fan inside the car it is most likely the resistor on the motor or the switch itself.The climate control unit on these models had problems and i have changed a few.Thats the most likely cause.

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Sean Halliday

Expertise

general auto repair,japanese,bmw,mercedes,mini cooper 1960/2009,general british cars,ford.I DO NOT work on automatic transmissions.Manual transissions i install clutches only.Many people ask me to diagnose noises from their cars,unfortunately i cannot do this unless i hear it.As you appreciate,vehicles can and will make a variety of noises.I DONT UPGRADE or fit aftermarket performace kits,parts,chips,only replacement parts.

Experience

40 years experience on all general auto repair.

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