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

What to do if your Mercedes AC unit stops working?

Be aware that if you reset the unit and it again stops working, you need to take the vehicle in to the dealership for repairs. Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position. This is as far as the cylinder will go without cranking the engine.

Why does my Mercedes air conditioner keep blowing hot air?

In many models, the AC keeps blowing hot air even after recharging the coolant. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. A Mercedes air conditioning reset is a possible solution. Do you know how to do it? Is there any other way to fix the glitch?

What is the recirculated air button on a Mercedes?

This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously. The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it.

Are there any problems with the Mercedes ML350?

My sales person and the shop foreman witnessed this, and although they looked as confused as I was he turned off the DRL’s in the menu and told me very politely that everything is fine and not to worry, it’s a beautiful vehicle, enjoy it..

Why is my Mercedes Benz ML making noise?

A week later the ML developed a chattering noise that was coming from the HVAC fan control. So back in for its 4th service visit in as many months of ownership. This time the ML was in for four days. The blower motor was replaced and part of the dashboard and A-pillar were removed and insulated with felt tape.

What are the headlights on a Mercedes ML350?

Not the daytime running lights, but the headlights & taillights. The lights when set in the “auto” mode will occasionally come on for no reason even on the brightest and “sunniest” day.

Why does my Mercedes Benz fan keep running?

Automotive information based around Mercedes-Benz information and repair assistance along with other makes and models. No matter what car you own or need help with, my tips and tricks and teachings can help you along the way. An error occurred while retrieving sharing information. Please try again later.

What to do if your a / C fan won’t turn off?

At the room thermostat: the FAN-AUTO-OFF or FAN ON/OFF switch on the room thermostat should be checked. The fan control should be set to AUTO. You can try turning the switch to OFF too. Other snafus such as a shorted thermostat wire can also cause the A/C or warm air furnace fan to run continuously. at THERMOSTAT WON’T TURN OFF. 2.

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 to troubleshoot your Mercedes medic air conditioner?

Turn the A/C ON. If you have an Economy button make sure that is off. Make sure fan is on HIGH, temperature selector is turned all the way to COLD, and that the A/C and recirculate light indicators are on. Set the temperature to cold, the lowest setting. Set the cooling fans on high on the climate control.

Why does my car engine not turn off when I remove the key?

Your engine will continue to run even when you remove the key from the ignition because the fuel pump is not shutting off. This problem is typically caused by a faulty fuel pump relay or a defective ignition switch. In this article, we take a look at why your engine won’t turn off when removing the key and what you can do to stop the engine.

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

When does the HVAC fan turn on and off?

In normal operation, when your thermostat is set to “auto,” it will tell the blower fan plus the heating or cooling components to turn on and off at the same time when the desired temperature is reached. In many systems, the blower fan runs a minute or so before heating or cooling begins and ends to get air flowing.

What to do when your fan won’t shut off?

The fan switch on the thermostat is in the auto position, not the on position. You tried turning the thermostat to the off position, nothing works. The only way to get that pesky fan to stop running is to shut it off at the breaker or the Emergency Shut-off switch.

Where is the regulator on a Mercedes fan blower?

The Mercedes Benz fan blower motor regulator is a series of resisters in a printed circuit board about 2-inches square located right next to the blower motor.

Where is the resister on a Mercedes Benz fan?

Just to the left of the blower motor, an electrical connector connected to a flat 1-inch-by-2-inch plate can be seen. This is the blower motor resister, which controls the fan speeds. Disconnect the multi-wire connector from the blower motor resister next to the blower motor. Start the car and turn the air conditioning on.

Why does my blower motor run when the car is off?

Blower Motor runs when car is off! Long story short – it was the blower fan regulator. For future reference, don’t buy a cheap off brand replacement unit, it may be defective.

How long does a Mercedes Benz blower fan run?

Pressed the switch again, the blower fan stopped again for a few seconds, then resumed the lower speed. The owner’s manual notes the fan may run for up to 30 minutes in warmer temperatures. Left it for an hour – still running at the low speed.

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.

What happens when you turn off the engine on a Mercedes?

When you turn the key off on your Mercedes diesel, you may have noticed that the engine will not quit immediately. In some cases it may even keep running a second or two after you have turned the key to the off position before it finally quits.

Can a car fan still run after the engine is turned off?

Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.

How do I Turn Off the blower when the car is off?

Pull ignition key, blower remains off for 2-3 seconds, then starts running at lowest speed. Press “rest” switch – button lights, fan runs at higher speed. Press “rest” switch again – fan stops, then starts again at a lower speed. Something higher up in the power chain is providing power when the ign. switch is off and the fan switch is off.

How much does it cost to replace blower motor on Mercedes E320?

A malfunctioning HVAC blower motor regulator can cause the blower motor to operate below the requested speed or not at all. Updated regulators are available; the blower motor and cover need to be replaced at the same time to upgrade the system. The average cost for a Mercedes-Benz E320 Blower Motor Replacement is between $727 -$748.

How does a Mercedes Benz blower motor work?

That is the design. The blower motor (A32m1) is powered from circuit 30, which is the unswitched battery voltage, via fuse f25 (30A). I second the above posts.

Why is my Mercedes air conditioner blowing hot air?

Another benefit of preventive maintenance is that in the harsher months of summer, when the weather is extremely hot, new problems can arise with your Mercedes, or any vehicle for that matter.

The Mercedes Benz fan blower motor regulator is a series of resisters in a printed circuit board about 2-inches square located right next to the blower motor.

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.

Why does my car blower motor not shut off?

If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.

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