Fan won't stop

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Marcelo Mansilla - 06 Mar 2006 14:40 GMT

The aux fan of my w124 230e 1992 is always on when the engine coolant T° is
about 15 celcius degrees or more.
When I unplug the coolant temp sensor (blue one on top front of the engine),
the fan still keeps running, so I think it might be the relay located behind
the fuse box.

But early in the morning, when the outside T° is about 10° celcius, the fan
doesn't engage.

Maybe the relay hangs up only with certain amount of T°.

Or may be there is other device that I´m not aware of.

Is there any way to test this relay?... Could anyone put me in the right
direction to solve this?

Any help will be appreciated.

Marcelo Mansilla
Santiago - Chile

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T.G. Lambach - 06 Mar 2006 22:18 GMT

Fan operation may be related to A/C as well as to the engine. There may
be a temperature sensor on the A/C accumulator (also known as the
receiver-dryer) that's near the condensor (in front of the radiator).

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Marcelo Mansilla - 07 Mar 2006 16:32 GMT

Thanks TG, I will check that one.

> Fan operation may be related to A/C as well as to the engine. There may
> be a temperature sensor on the A/C accumulator (also known as the
> receiver-dryer) that's near the condensor (in front of the radiator).

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