Is there a blower motor relay I should check?
20

Asked by imyt19 May 29, 2014 at 09:33 PM about the 2002 Mercedes-Benz SLK-Class SLK 320

Question type: Maintenance & Repair

My a/c was working intermittently, so I replaced cabin air filter and removed debris,
leaves from blower motor...no change. I then got a replacement blower motor resistor
and a/c worked on all settings, but when I remove key from ignition the fan keeps
blowing. I was sent another resistor, same results. Is there a relay somewhere that might
be stuck on causing this, or are both resistors likely bad?

7 Answers
12,535

TopShadeTree answered 9 years ago

There is a relay for your ac blower,could be bad,making it not turn off,points may be stuck.

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20

imyt19 answered 9 years ago

Thanks. Any idea where the relay might be located? I'm guessing it is in the vicinity of the blower motor?

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20

imyt19 answered 9 years ago

I forgot to mention, when I put the old resistor back in the a/c is still intermittent, but it does turn off as expected when I remove key from ignition.

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30

jcampi32 answered 8 years ago

imyt19, did you resolve this issue? Was it a relay? I have similar issue with C350 2006. Replaced motor and resistor and the fan runs at high. No speed control. Thanks,

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Dana answered 5 years ago

I can hear my fan running while driving when I lift up the hood u can feel the blowing of the fan in your face...unsure what is wrong

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