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S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

1991 400 SE blower fan not working- please help!

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Old Jul 8, 2013 | 12:51 PM
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iwona.pawel
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400 SE
1991 400 SE blower fan not working- please help!
Hi, can anyone please help with this one, please :-)
Mercedes '91 400SE, fan stopped working- checked fuses, all ok, purchased fan blower resistor regulator- when replaced fan works at full speed constantly even when ignition is off, and the only way to turn it off is to disconnect the battery. I'm totally confused now, I was hoping that replacing regulator will solve the problem, I've read that thermal paste should be used? is that true? What else should I try? any advice would be much appreciated.
Iwona
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