How does a Mercedes Benz fan blower work?
The Mercedes has a series of sensors that, working in concert with a computer, maintain a constant climate in response to the settings on the console. These sensors even sense when the window is down or the door is open and increase the fan speed as necessary to maintain a constant temperature within the car.
Why is my Mercedes-Benz E320 heater not working?
Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My Heater Working? What are common reasons my Mercedes-Benz E320 has heater problems?
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 is my Mercedes Benz radiator not turning on?
If Star Diagnosis is used, it is possible to check how much fan actuation is requested from ECM and how much from AC. Aso the fan can be actuated on demand. This will give the complete overview. It seems very strange that ECM does not actuate the fan at 95 in the cluster, since one sensor is used for both.
Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My Heater Working? What are common reasons my Mercedes-Benz E320 has heater problems?
Is the S class heater blower motor still working?
S Class Heater Blower Motor – There is Hope! The heater blower motor on my W220 S320 CDI stopped working so I removed it with a view to replacing it. When removed, I could not turn the fan/motor rotor at all and I thought it would be a straight replacement job.
Why did my W220 S320 CDI fan stop working?
The heater blower motor on my W220 S320 CDI stopped working so I removed it with a view to replacing it. When removed, I could not turn the fan/motor rotor at all and I thought it would be a straight replacement job. Looking at it (as an engineer) I thought that the dealer price for its replacement wasn’t value for money.
How to remove a Mercedes’s class heater motor?
Great DIY sticky in that forum which may help with removal of the blower and regulator: http://www.benzworld.org/forums/w210-e-class/1257785-c-fan-speed-regulator-replacement-2000-a.html Put plenty of pillows in the footwell to save your back, and glasses for your eyes when removing the blower motor.
Why is my Mercedes radiator cooling fan not working?
This feature is not available right now. Please try again later. This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. The problem in most cases is a bad ecm so in order to fix it the ecm will have to be replaced and programmed to work with your vehicle. Check the mass airflow sensor first.
What causes a heater fan to stop working?
What else would stop working if the OVP is bad or what else causes the heater fan to not work. Its too cold now to use the car without heat. Assuming all your fuses are good, either the blower motor is toast or the blower motor regulator has gone. There is a nice R/R link for the blower motor in the DIY section.
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.
Why is my Mercedes-Benz heater fan not turning on?
The last one should have around +6V; the exact voltage will vary depending on the fan switch setting. If any of these are wrong, check for connection problems. If the control voltage never appears, the regulator will never turn on the fan. This control voltage is coming from the climate control unit on the dash.
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.
What happens when the blower motor does not come on?
As a note, 85 percent of the time when the blower motor does not come on or operates at one speed only, the blower motor resister is at fault. The resister emits substantial heat from the resistance it supplies and eventually burns up. The resister is inexpensive as parts go and is simple to replace.