Thread: R129 500SL . Hot air from side vents , cold air from center vents with AC on
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Old 09-01-2018, 12:48 PM
ytech15 ytech15 is offline
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Join Date: Aug 2017
Location: South NJ
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R129 500SL . Hot air from side vents , cold air from center vents with AC on
I checked the mono valve and it seemed fine getting 12V DC at the connector. I replaced with a known good (thinking the internal seals may be bad)- resolved the issue for 24HR . Now the issue is back. Am I facing corrupt actuators? A faulty control unit?
Last edited by ytech15; 09-01-2018 at 01:19 PM.
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