Which sensor is it? - Alfa Romeo Forum
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Which sensor is it?

Hi everyone...hope someone can advise...

Noticed sometime ago that the temp gauge on my 156 is reading all sorts of crap... actually about 20 degrees out side...and reading -7.....

Well, recently I cleaned out the cab sensor, and for some reason it seamed to work...but it has started to play its old tricks again...what my question is....

Is it the internal sensor that is connected to the temp gauge on the dash? or the external? if its the internal, what is the point with the one on the wing mirror? Also will changing the interior sensor possibly cure the aircon problem I am still experiencing? my gut feeling is that it wont, but its worth a try, and finally...which part do I ask for and were can I get one as my local dealer...not so local really....wants the car in for checking...

Hope that you can help
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Re: Which sensor is it?

The external one displays on the infocentre. Usually when they fail they read, I think, -20 all the time, maybe yours needs a clean or has some loose wiring.

As to replacing the sensor, not sure if it's available as a separate part, think someone said that you can only buy the whole mirror housing with the sensor fitted but that could be wrong. If it's not then maybe a trip to the breakers looking for a good sensor would be best rather than fitting a whole new mirror housing.
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