How to test radiator fan module control box?
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How often do radiator fans come on with AC on?
The fans are not coming on with the ac, or ever. I tested the fans and they do work when jumped with 12v and they will come on intermittently if i put the car in the on position , turn AC on LO setting, with the recirculation on. maybe once out of every 10 times.
What causes a radiator fan to INOP?
That would also explain high PSI in the ac from inadequate cooling. If the outside ambient temp sensor is reporting an incorrect low temp……….such as -40C this will also force the AC and fans to INOP or sporadic. In many cases there will be no error for it. Be sure to log it. Very detailed thank you!
How to connect a fan control relay module?
Connect other end to low speed fan control terminal at fan control. l Using a second jumper wire, connect one end to a good ground, connect the other end to the ground terminal on the blower motor. l Did fan control run?
Where is the fan control module on a car?
The A/C fans that are mounted in near the radiator of the car are also controlled by this module. Usually, you will have a variety of signs that the A/C fan control module is going out.
What are the symptoms of a bad AC fan control module?
2. Cooling fans not running at all If the cooling fans are not coming on at all, then this may also be a sign that the fan control module is damaged. Without the cooling fans running properly, you will be at risk of having the car overheat. Running a car hot for a long period of time can lead to other damages like a blown head gasket. 3.
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Why are my cooling fans not coming on?
Cooling fans not running at all If the cooling fans are not coming on at all, then this may also be a sign that the fan control module is damaged. Without the cooling fans running properly, you will be at risk of having the car overheat. Running a car hot for a long period of time can lead to other damages like a blown head gasket. 3.
Why does my C300 4Matic run full speed?
I am a new owner of a 2010 C300 4Matic that I bought from an insurance auction – the car was a salvage car due to a front impact. I have repaired all of the damage, but there is one issue that I cannot figure out. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. The AC is OFF.
What should the radiator fan be running at?
The fan continues to run at its maxiumum speed, regardless of the engine temperature. I allowed the car to run today from cold to just above 80 deg. C before sutting it off today.
Which is the hot side of the radiator?
When one feels the upper radiator hose (driver side), it is HOT, and the air blowing near that side of the radiator appears to be hot. The lower radiator hose (passenger side) is COLD, and the air blowing near that side of the radiator appears cool. The heat is also turned on full blast, and blows lukewarm/cool air.
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.
I am a new owner of a 2010 C300 4Matic that I bought from an insurance auction – the car was a salvage car due to a front impact. I have repaired all of the damage, but there is one issue that I cannot figure out. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. The AC is OFF.
The fan continues to run at its maxiumum speed, regardless of the engine temperature. I allowed the car to run today from cold to just above 80 deg. C before sutting it off today.