Temperature Sender Unit

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petercharlesfagg - 09 Jan 2007 23:28 GMT

405 1.9D

How can I test a temperature sender unit?

If it is faulty I understand why my cooling fans are in operation all
the time, but how can I be sure that the sender unit is faulty before I
buy new?

Regards, Peter.

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MICHAEL ROCHE - 10 Jan 2007 16:47 GMT

Peter
The resistance of the temperature sender changes with heat so you could test
its resistance when cold and when the engine has warmed up. You should see a
variation in reading.
Mike

> 405 1.9D
>
[quoted text clipped - 5 lines]
>
> Regards, Peter.

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petercharlesfagg - 10 Jan 2007 23:07 GMT

> Peter
> The resistance of the temperature sender changes with heat so you could test
> its resistance when cold and when the engine has warmed up. You should see a
> variation in reading.
> Mike

Thankyou Mike, I will try this soon and get back to you.

Not sure how to use my little tester though, but willing to try
anything once!

Peter.

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