How can I rule out the monovalve? What are the symptoms if the monovalve ist not working properly? Shouldn't I have the heat on all the time?
Quote:
Originally Posted by jcciem
a sticking monovalve will cause warm vent temperatures with a properly operating ac system. ask me how I know
'87 300sdl 286,000
'94 Sl 500 55,000
'89 300te 176,000
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