1999 C280 external air temperature sensor

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1999 C280 external air temperature sensor

12-24-2008, 04:08 PM

vsnyder

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Join Date: Dec 2008

Posts: 1

1999 C280 external air temperature sensor

Where is the external air temperature sensor on 1999 C280?

What color wires lead to it? It's not shown on the wiring diagrams I have for the A/C.

The climate control diagnostics report the external air temperature sensor as OPEN. The temperature indicator below the speedometer reports -36F.

The heater doesn't work unless the temperature is set to HI, one step above 92. I think the reason is that the external air temperature sensor is defective or disconnected.

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