The valve on my old Mercedes was called a Monovalve. Vehicles such as ours would have duovalves, because they have dual temperature settings (driver and passenger side). I have never looked at ours, but it would either be 2 separate valves, or one duovalve.

Yes, this valve controls heat/cold functions. It opens and closes based on desired temperature. A stuck valve would likely cause hot air to come out--the very symptom my Merc had when I swapped it.

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01 X5 4.4 (sold), 99 Toyota Land Cruiser, 08 Ram 1500 Quad cab 4wd 6-Speed Manual, 06 Prius, 12 Camry SE.

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