A/C - Popping/Clicking Noises From Behind Dash

TSB 09-6-4

04/06/09

CLICKING/POPPING NOISE BEHIND CENTER OF
DASH - VEHICLES BUILT ON OR BEFORE 8/8/2008

LINCOLN:
2004-2009 Town Car

This article supersedes TSB 08-12-11 to update the vehicle model years, Service Procedure and add a production fix date.

ISSUE
Some 2004-2009 Lincoln Town Car vehicles built on or before 8/8/2008 may exhibit a clicking or popping noise from the center of the dash area when the Electronic Automatic Temperature Control (EATC) is on, engine running, and even up to several minutes after the vehicle has been shut off. This may be caused by either the Panel/Defrost and/or the Floor Door mode actuators rapidly cycling back and forth during EATC operation. This condition does not affect defroster or heater performance.

ACTION
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

NOTE
IT IS CRITICAL THAT THE NOISE BE ISOLATED TO EITHER OF THE IDENTIFIED ACTUATORS BEFORE PROCEEDING. OTHER ACTUATOR NOISES, NORMAL A/C REFRIGERANT PRESSURE EQUALIZATION OR COOLANT/AIR IN THE HEATER CORE WILL NOT BE CORRECTED BY THE COMPLETION OF THIS PROCEDURE.

1. With the EATC in Automatic Mode and active (engine temperature warm enough to allow normal EATC operation), verify that the noise is being caused by either of the two affected plenum chamber actuators, by turning engine off and listening for a clicking or popping noise in the plenum area. The noise may be heard for up to 2 minutes after engine key off. If either of the two identified actuators are not the cause of the noise, do not proceed and continue with normal diagnostics.

2. Refer to the Workshop Manual (WSM), Section 412-01 to replace both plenum chamber actuators with updated parts.





Parts Block

WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATION DESCRIPTION TIME

090604A 2004-2009 Town Car: 2.9 Hrs.
Replace Both Plenum
Chamber Actuators,
Includes Time To Remove
And Install Instrument
Panel (Do Not Use With
19700D, 19700D7,
19700D5, 04320A,
04320B, 19680A, 18805E)

DEALER CODING
CONDITION
BASIC PART NO. CODE
19E616 30





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