Navigator 2WD V8-5.4L (2007)
Refrigerant Filter: Customer Interest
A/C - Compressor Failure
TSB 07-18-3
09/17/07
A/C COMPRESSOR FAILURE
FORD:
2007-2008 Expedition
LINCOLN:
2007-2008 Navigator
ISSUE
Some 2007-2008 Expedition and Navigator vehicles built before 7/18/2007 may have A/C system filters (integral to the receiver/dryer desiccant
cartridge) that fail to filter the system. If the unit has had a compressor failure that has sent debris into the system, the filter will not stop the debris from
contaminating the entire system.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
When debris is present throughout the entire system, it is imperative to completely clean the A/C system to prevent repeat failures from residual debris
that contaminates the system after the initial failure. To prevent repeat failures, the following service procedure must be performed.
WITH ROTUNDA A/C FLUSH AND PURGE MACHINE:
1.
Conduct the evacuation of R134a per Workshop Manual (WSM), Section 412-00:
Climate Control System - General Procedures.
2.
Drain and refill the Rotunda A/C Flush and Purge machine with a new 1 gallon can of A/C Flushing Solvent. Replace the filter (Motorcraft(R)
FL-1A) on the machine.
3.
Remove the defective compressor from the vehicle per WSM, Section 412-01. Pour 2 fl.oz. of PAG oil into the suction port of the new
compressor. Install the new compressor.
4.
Remove and replace the A/C discharge and muffler line from the system.
5.
Remove the condenser from the vehicle.
6.
Remove the Receiver Drier Cartridge from the vehicle per the WSM, Section 412-01 and discard.
7.
Install the original plug with 0-rings and snap ring back into the condenser without a cartridge present.
8.
With the Rotunda A/C Flush and Purge machine, attach the appropriate adapters, and flush the solvent through the condenser for a minimum of 30
minutes, followed by a minimum of 20 minutes of the purge mode of the machine.
9.
Remove the original plug and snap-ring and discard.
10.
Install the new Receiver Drier Cartridge, plug with 0-rings, snap-ring and dust cap included in the kit, and install condenser into the vehicle.
NOTE
IF THE RECEIVER DRIER CARTRIDGE IS NOT AVAILABLE, REPLACE THE CONDENSER ASSEMBLY.
11.
Remove and replace the Front Thermal Expansion Valve (TXV). Be sure to re-use the insulating foam from the original TXV and apply electrical
tape or tie straps to hold it in place.
12.
With the Rotunda A/C Flush and Purge machine, attach the appropriate spring lock connectors and flush solvent through the Front evaporator for a
minimum of 20 minutes followed by a purge of a minimum of 20 minutes.
13.
For units with auxiliary A/C, disconnect the rear A/C lines underneath the rear of the vehicle.
