Cooling Fan Not Engaging
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Joined: Dec 2014
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CL55
Cooling Fan Not Engaging
I apologize if this has been addressed before but I'm on my phone and having difficulty searching. No access to a computer at the moment.
My car has been running hotter than it should (95*C) in mild temps (55*F). I've noticed that the cooling fan will not engage unless the A/C is on. I've checked all the fuses (I think) and all seem well.
Not sure where to go from here.
My car has been running hotter than it should (95*C) in mild temps (55*F). I've noticed that the cooling fan will not engage unless the A/C is on. I've checked all the fuses (I think) and all seem well.
Not sure where to go from here.
Thread Starter
Senior Member
Joined: Dec 2014
Posts: 286
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CL55
Thanks for the reply. It did eventually kick on (without A/C on) around 98*C and stayed there. I'm going to replace the I/C pump as a general maintenance item as I've read this can cause higher temps.
Super Member
Joined: Nov 2012
Posts: 698
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From: Germany
C215 CL55 AMG, W124 500E, W210 E430, W124 300E
I find that even in hot summer days with AC on and some aggressive driving of the car, the larger HE gets barley hotter than "handwarm".
I never measured the actual temps, but i would assume the hottest i find was around 50°C at the HE. This does of course not translate into actual Intake Air Temperatures. My IATs Stock reached already 68°C during hot summer with AC on.
I did the "-10°C Fan mod", but made an actual -8°C mod out of it. Needle stays always around the 90°C mark which i find perfect
Thread Starter
Senior Member
Joined: Dec 2014
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CL55
I have a new IC pump on the way. I was reading that that could be a possible issue for higher operating temps. When driving around last night I found that after pushing it hard then letting off that the SC wouldn't engage when I floored it again. Then, if I drove calmly for acouple miles and then punched it the SC came back online. IC pump was suggested then as well.
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Joined: Jan 2013
Posts: 495
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From: south shore
12' E559
same happened to buddy. went on cruise at one point his s/c wouldnt kick in. replaced pump days later never happened again. i for one never had that happen, but the before and after watching my IAT's the pump deff helped.
I have a new IC pump on the way. I was reading that that could be a possible issue for higher operating temps. When driving around last night I found that after pushing it hard then letting off that the SC wouldn't engage when I floored it again. Then, if I drove calmly for acouple miles and then punched it the SC came back online. IC pump was suggested then as well.
