300M, Concorde, LHS, New Yorker Discuss the Chrysler LH platform cars within.

HVAC Control Unit or Servos?

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Old 09-17-2014, 08:56 PM
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Default HVAC Control Unit or Servos?

Hi, 2000 300m with auto hvac unit. Fails to control temp or mode. Control panel will not go into diagnostic mode even after pulling fuse 19 and resetting. Neither blend nor mode servos are responding to input. How do I diagnose this without just buying $400 in parts and replacing all components?

Thanks for the help in advance.
 
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