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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53018
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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I have a ML3a, 2008, Yes, disconnected the battery, No,

Customer Question

Hello Pearl
JA: What is the model/year of your Mercedes?
Customer: I have a ML3a
JA: What year is your Mercedes?
Customer: 2008
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: Yes, disconnected the battery
JA: Have you tested the battery with a voltmeter? And can you see if it's leaking or not?
Customer: No
JA: Anything else you want the mechanic to know before I connect you?
Customer: Ml350 ac fan continue to run when car is off
Submitted: 28 days ago.
Category: Mercedes
Expert:  Marty replied 28 days ago.

Hi, welcome to Just Answer. My name is***** problem is usually caused by a shorted blower motor control unit. The control unit is built into the blower motor. You will need to replace the blower motor to repair this problem. Also check for signs of water intrusion into the blower motor connector. Water can sometimes find it's way into the connector and short out the control unit.

Let me know if you have any questions.

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