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No Heat, I Need Sc300 Heat System Schematic


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I have a 93 sc300,, the heat is acting up. It does not matter where I have the control set, sometimes on max cold,, I get full heat,, other times on max hot, I get nothing. The coolant temp is fine, no problems there, and the coolant level is good. Also the cabin temp probe is plugged in. I just do not know the system,, if it vaccuum controlled, or what.

If anybody has any advice,, it would be appreciated.



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