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Q: drivers side heat is cool while passenger side is hot on 2007 Lincoln MKX

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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
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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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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