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Old 11-27-2001, 08:08 AM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
On this & "almost" all MB's there is a heater valve that closes when a 12V power signal is sent to it. Try disconnecting the electrical connection & you should have FULL heat. If not then the heater valve isn't allowing water to flow OR the heater core is partially plugged.
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