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C240 radiator fan connected to a/c system?

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Old 12-19-2017 | 04:31 AM
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Skye168
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W203 C240
C240 radiator fan connected to a/c system?
Good day ! Is the radiator fan connected to the a/c system ? Because my a/c compressor is due for replacement, is it the cause that the radiator fan not kicking in ?

I don't suspect a bad radiator fan or fan module because i pulled off the socket in the coolant temperature sensor and the fan turns on high speed but when i plug it back the radiator cooling fan stops
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Old 12-19-2017 | 12:45 PM
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It's connected to the AC yes, but a bad compressor will not prevent it from working. Unplugging coolant sensor shows all is fine. Probably your engine is just not hot enough yet.
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Old 12-19-2017 | 05:04 PM
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W203 C240
Originally Posted by Russell Ormerod
It's connected to the AC yes, but a bad compressor will not prevent it from working. Unplugging coolant sensor shows all is fine. Probably your engine is just not hot enough yet.

the problem is that the reading in the guage is around a 100
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Old 12-19-2017 | 11:47 PM
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Then the fan should only just be turning very slowly. Scan it to check faults .
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Old 12-21-2017 | 01:21 PM
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W203 C240
Originally Posted by Russell Ormerod
Then the fan should only just be turning very slowly. Scan it to check faults .
replaced the engine coolant temp sensor the fan kicks in late and very slowly
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Old 12-21-2017 | 02:16 PM
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Probably normal
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Old 12-21-2017 | 04:37 PM
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W203 C240
Originally Posted by Russell Ormerod
Probably normal

while it is being parked and turned off the engine cools down first while the cooling system is still very hot ... is that normal ?
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Old 12-23-2017 | 03:46 AM
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As long as when you stationary at idle if the car temp reaches 95 or so and settles there then there is no issue. If it continues to rise to 110 115 then you have a problem.
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