Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 (1989)
Figure 1 - Sealing Air Inlet Screen
7.
Check heater/evaporator case for debris. Remove any debris present through the power module/resistor block opening. If debris is imbedded into
the evaporator core face and cannot be removed, the core will have to be removed from the vehicle and cleaned off car. If a large amount of debris
is present in the heater/evaporator case, the air inlet screen will require sealing around the windshield wiper post holes and fender edges as shown
in Figure 1.
8.
Command the air mix valve (door) to the maximum cold position and the blower to low speed by:
On FWD Electra and LeSabres - turning the ignition to the on position without starting the engine and setting the electronic climate control to
Econ, 60~F temperature and low blower.
On Skyhawks and Skylarks, move the temperature door control lever to the maximum cold position, blower on low and turn the ignition on.
On Rivieras and Reattas - turning the ignition to the on position without starting the engine and selecting front defrost to disable the cold purge
routine then setting the climate control panel of the CRT to Econ, 60~F temperature and low blower.
9.
Open all windows and doors. Exit vehicle.
10.
Place drain pan with at least a two quart capacity below heater/evaporator drain hole to catch disinfectant and rinse water runoff.
FIGURE 2
11.
Position pedestal fan as shown in Figure 2 and turn on high to provide cross ventilation during cleaning procedure.
