interior heat on the 1997 to 1998 Lincoln Mark VIII is a
common problem. The problem is a part that Ford calls
A/C Electric Blend Door Actuator ( FZLZ-19E616-AD) that
costs only about $25, but requires over 6 hours of labor
to replace. The cost to install this part at a dealer is
$600 to $900. It would be far better to make the part so
it does not break so easily. It is advised to reinforce
the part so that you may not need to replace this part
so often. See Blend Door Actuator Reinforcement for a
procedure to reinforce this part. The following
procedure to remove the old actuator and install the new
one takes 5 to 6 hours. With practice, you may be able
to do it in 3 hours.
steering wheel in the furthest out and down
the battery ground cable. This is very important to
prevent shorts or your airbags from going off.
parking brake on and shift the car into first. This
is to allow better access to the instrument panel.
Chock the wheels to prevent the car from rolling.
panel with the rear window defroster button, by
pulling back on it from the upper corners. Use your
fingers to do this. Do not use a screwdriver as you
will damage the panels. Unplug the defroster and the
heated seat switches if so equipped.
Remove the radio using the
special U-shaped Ford radio removal tool that fits
into the four holes in the front of the radio. Put
the tools in until they click, then push them
laterally and pull towards yourself. Remove the
radio connections and antennae and put the radio
Remove the wood instrument
panel center panel screws which are under the panel
you just removed.
Pull back on the inside of
the wood instrument panel center panel to remove it.
Unplug the ground wire of the panel by pressing in
the small button.
Remove the six screws
under the panels for the center console support
Remove the mobile phone if
so equipped. Then remove the two screws under the
rubber mat in the center console glove compartment.
Carefully unclip the the
rear of the gear shift selector housing from the
floor console. This is very fragile, so work slowly
Disconnect the wiring
harness for the cigarette lighter and center glove
box light and then remove the center console by
pulling it back and up.
Remove the two screws on
the underside of the driver's lower instrument
panel. Pull back the lower instrument panel to
Disconnect the three
steering column electrical connectors.
Remove the four nuts on
the underside of the steering column. Remove the
u-shaped column retaining rod and the steering
column over-travel prevention cables which are held
down by the nuts closest to the driver.( If you do
not have the steering column over-travel prevention
cables, then you need to have them installed to
prevent future expensive problems with the steering
tilt mechanism. The cables were part of a recall by
Ford. It should be no charge to install them by the
Allow the steering column
to come down to rest on the lower instrument panel
reinforcement bar. I kept the lower duct in place
with no resulting damage.
Remove the two screws of
the upper instrument steering column cover that are
located on the instrument cover and remove the
Remove the headlight
switch knob by pulling it back.
Grasp the the left side of
the headlight switch panel and remove it. Do not use
a screwdriver as you damage this panel. Twist out
the mini-bulb connector on the underside of this
Release the clips of the
instrument dimmer switch. Pull out the dimmer switch
and disconnect the electrical connector.
Remove the two screws on
the headlight switch panel base.
Remove the two screws on
the top underside of the instrument panel. Pull the
instrument cluster finish panel back.
Pull up on the front of
the plastic door sill panels until the they unclip .
The sill panels do not need to be completely remove.
Just the front needs to be unclipped.
Remove the left and right
cowl kick panels by pulling back on them.
Remove the left and right
roof side inner front moldings by unclipping them.
Unclip the mobile phone speaker on the left molding
if so equipped.
Using your fingers, lift
the rear of the rear edge of the instrument panel
defroster grille opening. Disconnect the A/C sunload
sensor on the right side of the panel. Pull back the
panel to remove it.
Remove the three back
pushpins on the underside of the glove box which
hold up the black instrument panel insulator.
Disconnect the courtesy light by twisting it and
remove the black instrument panel insulator.
Unhook the cable on the
right side of the glove box by sliding the cable
clip out of the notched slot on the glove box Remove
the three screws holding the glove box hinge to the
instrument panel. Remove the glove box.
Remove the two left hand
instrument panel 15 mm cowl nuts. One is located
under the kick panel. The other is about six inches
deep in the instrument panel. You can access it with
a socket wrench with a 6 to 8 inch extension.
Remove the two center
instrument panel support nuts located in the center
front near the floor under the removed center
Remove the two bolts and
the bracket that connects the instrument panel to
the floor on the drivers side near the forward edge
of the console.
Remove the one right hand
instrument panel 15 mm cowl bolt located under the
right side kick panel that was removed.
Remove the six instrument
panel top cowl bolts which are located under the
cowl defroster grille panel that was removed.
Now comes the big part.
Pull the entire instrument cowl back about three
inches on the right and an inch on the left.
Now look through the
opening from which the glove box was removed towards
the front and center. You will see a gray door
control lever. This the lever that you can pull down
a little when then the blend door actuator arm
breaks to get some heat. This will not work if the
blend door actuator has completely come off the
shaft of the motor. The gray arm works in tandem
with the black arm of the blend door actuator via
the flat long connector that holds them together.
Remove the four screws
that hold down the A/C Electric Blend Door Actuator.
Three of the screws are visible. The fourth one is
in the upper left hand corner. A 1/4 inch ratchet
wrench is useful for removing these screws. I also
found that a 5/16 inch GearWrench worked great for
getting at the hard to get screws to remove and then
later install them in the new Blend Door Actuator.
You will find that the A/C
Electric Blend Door Actuator comes out leaving the
arm with the broken shaft still attached to the long
flat connector between the arms. Remove the
electrical connector from the A/C Electric Blend
Door Actuator. Pull out the broken black door arm
out of the hole of the blend door. Carefully bend
out the clip retainer of the black arm to remove the
post of the black arm from the long flat connector.
Position the new A/C
Electric Blend Door Actuator under the dash in the
correct orientation. Connect the electrical
Carefully attach the long
flat connector onto the black arm of the new A/C
Electric Blend Door Actuator by bending back the
clip retainer of the black arm.
Reinstall the screws
attach the A/C Electric Blend Door Actuator.
Push back the instrument
panel cowl. Use a screwdriver to pull back the left
and right front weather-stripping over the cowl on
each side. Start from the top and move the
screwdriver down in a smooth motion.
Reverse the steps above to
reinstall all the parts you removed. Torque the four
nuts on the underside of the steering column to 26
to 33 ft-lb. Torque the left and right instrument
cowl nuts to 40 to 52 ft-LB Torque nuts holding the
instrument panel to floor bracket to 20 to 24 ft-LB
Torque The instrument panel center support nuts to 8
to 10 ft-LB