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Drivers side heat is cool while passenger side is hot

(2007 Lincoln MKX)
in Albert Lea, MN on January 11, 2011
drivers side heating is cool no matter what temp is set while passenger works at whatever temp is set
Coolant level is fine and thermostat is working correctly
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Popular Answer
on January 11, 2011
Sounds like a possible temperature blend door actuator - left side - may be failing. A diagnostic test should be done with the Dual Mode Temperature Control (DMTC) system.
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