Why does the blower motor stay on even when the key is off?
When the regulator shorts out it will cause the blower motor to stay on even with the key off. You will need to have the regulator replaced and you may also need to have the blower motor replaced due to a parts modification. The system was updated to a different regulator which requires replacing the motor as well.
How can I stop the Mercedes blower motor?
Otherwise you will need to remove the panel under the passenger side dash and access the regulator and disconnect it. Unfortunately there are no fuses that can be removed to stop the blower motor. Marty, Mercedes Technician Category: Mercedes Satisfied Customers:57,126 Experience: Bosch Certified Master Tech. Over 35 years experience. Verified
What causes the a / C blower to run uncontrolled?
Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same. Still the Regulator?
Why does my Mercedes E320 fan not shut off?
Mercedes-Benz E320 The fan motor wont shut off when ignition… The fan motor won’t shut… The fan motor won’t shut off when ignition is turned off Show More Show Less Ask Your Own Mercedes Question Share this conversation Answered in 2 minutes by: 10/14/2011 Mercedes Mechanic: Marty, Mercedes Technician replied 9 years ago
Why does the blower motor keep running after I Turn Off the car?
Why does the blower motor keep running after I turn off the car? If your car uses a blower motor controller, it can keep running the blower motor after you shut down the engine. Those used to be installed only on vehicles with automatic climate control with variable speed fans, but now they’re installed on many late model vehicles.
Why does my Mercedes-Benz A / C blower run uncontrolled?
But under fault conditions it could fail as ‘always on’ or ‘never on’. Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same.
How does a blower motor controller work on a car?
It’s really a simple concept: the blower motor controller pulses either the power or the ground circuit on and off depending on which fan setting you choose.
What are the downsides of a blower motor?
The downside of blower motor resistors is that, in order to reduce voltage, a resistor converts the energy into heat. These days cars can’t afford to waste that energy—there are simply too many electrical accessories to run.
When the regulator shorts out it will cause the blower motor to stay on even with the key off. You will need to have the regulator replaced and you may also need to have the blower motor replaced due to a parts modification. The system was updated to a different regulator which requires replacing the motor as well.
What happens to the fan motor when ignition is turned off?
The fan motor won’t shut off when ignition is turned off The fan motor won’t shut off when ignition is turned off – Answered by a verified Mercedes Mechanic We use cookies to give you the best possible experience on our website.
Mercedes-Benz E320 The fan motor wont shut off when ignition… The fan motor won’t shut… The fan motor won’t shut off when ignition is turned off Show More Show Less Ask Your Own Mercedes Question Share this conversation Answered in 2 minutes by: 10/14/2011 Mercedes Mechanic: Marty, Mercedes Technician replied 9 years ago
Otherwise you will need to remove the panel under the passenger side dash and access the regulator and disconnect it. Unfortunately there are no fuses that can be removed to stop the blower motor. Marty, Mercedes Technician Category: Mercedes Satisfied Customers:57,126 Experience: Bosch Certified Master Tech. Over 35 years experience. Verified