Quote:
Originally Posted by jcyuhn
The red & green are not specific to R-12 vs. R-134a. Rather, they switch the fan on/off at different pressure points. Green requires higher pressures, red is somewhat lower. The climate control manual has the exact pressures, I no longer recall the values.
I'm not sure exactly how Benz determined who got green and which got red. As best I know, diesels got green, gassers red. FWIW I ran a red switch in my old 603 diesel. I suggest a red pressure switch and functioning fan clutch. You'll get maximum airflow at low speeds, and the fans will shut down when airflow is high enough to render them redundant.
- JimY
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Are you sure it's not the other way around: green lower; red higher ?
My 1988 300TE came with a "green" switch, but it was changed to "red" when it was converted to R134a.
Also, aren't these switches "temperature" not "pressure" switches ?
Thanks,
:-) neil