Ford Festiva. Instruction — part 86

SCREW TYPE SEAL CANS

Ensure can tap is fully closed. Screw refrigerant can into can tap fitting until tight. This will pierce the can. Connect tap to center hose on
manifold gauge set. DO NOT open tap until ready to dispense R-12 into system.

CONNECTING LINES & FITTINGS

1. A new "O" ring should be used in all instances when connecting lines and fittings (dip "O" ring in clean refrigeration oil and make

certain it is not twisted during installation). Always use two wrenches to avoid twisting or distorting lines and fittings, tighten coupling
nuts securely.

2. Ford spring-coupling fittings require a special coupling tool (Motorcraft YT-1056) to open or close. Use the following procedure to

connect or disconnect the spring-coupling fitting.

Ford Spring-Coupling Fitting

1. Discharge system using approved refrigerant recovery/recycling equipment. Place proper end of tool over refrigerant line. Tool fits both

3/8" and 1/2" fittings. Push tool into fitting cage to release spring inside. Pull lines apart and remove tool.

2. Before connecting, check internal spring for damage. If necessary, pry spring out and replace it. Clean fittings and install new "O" rings.

Fig. 1: Assembling Ford Spring-Coupling Fitting

PLACING SYSTEM IN OPERATION

After component replacement and/or system servicing has been completed and all connections have been made, proceed as follows:

1. Evacuate the system using a vacuum pump.
2. Charge the system with new R-12 (refrigerant) according to each individual vehicle as outlined in the GENERAL SERVICING article.

Also see Refrigerant Capacity in this Section.

3. Leak test the system, with particular attention to all new connections and components.
4. Make a performance test of the system. Never assume that a recharging has automatically corrected a problem.

COMPRESSOR REMOVAL INFORMATION - ISOLATION METHOD

On systems which have compressors equipped with stem-type service valves (Tecumseh), it is possible to isolate the compressor for removal.

Isolating

Turn both high and low pressure instruction valves to extreme clockwise (front seat) position. Loosen cap on high pressure manual valve
connection to compressor and allow gas to escape until compressor is relieved of pressure.

COMPRESSOR REMOVAL INFORMATION-DISCHARGE METHOD

This procedure is to be used on vehicles which have compressor equipped with Schrader service valves. In these cases, the compressor cannot
be isolated and the system must be discharged, using approved refrigerant recovery/recycling equipment, prior to compressor removal.

WARNING:

DO NOT open high side hand valve while air conditioning system is in operation. This high pressure
could rupture can or fitting at safety can valve, resulting in damage and personal injury.

CAUTION:

Use ONLY "O" rings designed for these Ford fittings (Motorcraft YF-982). Normal refrigerant "O" rings
will NOT seal.

Copyright 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.

Article GUID: A00039191

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1991 GENERAL SERVICING

A/C System Specifications - Applications & Oil/R-12 Capacities

COMPRESSOR APPLICATIONS - PASSENGER CARS

COMPRESSOR APPLICATIONS - PASSENGER CARS

COMPRESSOR APPLICATIONS - LIGHT TRUCKS & VANS

COMPRESSOR APPLICATIONS - LIGHT TRUCKS & VANS

BODY CODE DESIGNATIONS - LIGHT TRUCKS & VANS

BODY CODE DESIGNATIONS - LIGHT TRUCKS & VANS

REFRIGERANT OIL & R-12 CAPACITY - PASSENGER CARS

PASSENGER CAR REFRIGERANT OIL & R-12 CAPACITY

Application

Compressor

Continental

Ford FX-15 10-Cyl.

Cougar & Thunderbird

Ford FX-15 10-Cyl.

Crown Victoria, Grand Marquis & Town Car

Ford FX-15 10-Cyl.

Escort & Tracer

Nippondenso 10P13 10-Cyl.

Mark VII

Nippondenso 10PA17 10-Cyl.

Mustang

2.3L Engine

Nippondenso 10P15 10-Cyl.

5.0L Engine

Nippondenso 6P-148 6-Cyl.

Probe

2.2L Engine

Nippondenso 10P15A 10-Cyl.

3.0L Engine

Nippondenso 10P15 10-Cyl.

Sable & Taurus

2.5L Engine

Ford FS-6 6-Cyl.

3.0L & 3.8L Engines

Ford FX-15 10-Cyl.

3.0L SHO Engine

Nippondenso 10P15F 10-Cyl.

Tempo & Topaz

Nippondenso 10P15 10-Cyl.

Application

Compressor

Aerostar

Ford FX-15 10-Cyl.

Bronco

Ford FX-15 10-Cyl.

"E" Series

Ford FS-6 6-Cyl.

Explorer

Ford FX-15 10-Cyl.

"F" Series

7.3L Diesel

Ford FS-6 6-Cyl.

Gas Engine Models

Ford FX-15 10-Cyl.

Ranger

2.3L Engine

Ford FX-15 10-Cyl.

2.9L Engine

Ford FS-6 6-Cyl.

4.0L Engine

Ford FX-15 10-Cyl.

Model

Designation

Aerostar

"A" Series

Bronco & Explorer

"U" Series

Pickups (Full Size)

"F" Series

Ranger

"R" Series

Vans (Full Size)

"E" Series

Application

(1)

Oil Ounces

R-12 Ounces

Continental

8.0

40

Cougar & Thunderbird

7.0

40

Crown Victoria, Grand Marquis & Town Car

7.0

40-48

Escort & Tracer

8.0

36

Mark VII

8.0

40

Mustang

10P15 Compressor

8.0

40

6P148 Compressor

10.0

40

Probe

10P15 Compressor

8.0

40

10P15A Compressor

3.3

40

Sable & Taurus

FS-6 Compressor

10.0

44

FX-15 Compressor

7.0

44

10P15 Compressor

8.0

40

REFRIGERANT OIL & R-12 CAPACITY - LIGHT TRUCKS & VANS

LIGHT TRUCK & VAN REFRIGERANT OIL & R-12 CAPACITY

10P15F Compressor

8.0

40

Tempo & Topaz

8.0

36

(1)

Total system capacity, unless otherwise noted.

Application

(1)

Oil Ounces

R-12 Ounces

Aerostar (FX-15 Compressor)

W/Auxiliary Unit

10.0

(2)

56

W/O Auxiliary Unit

7.0

56

Bronco

7.0

52

Explorer

10.0

32

"E" Series

W/Rear Unit

10.0

72

W/O Rear Unit

7.0

60

"F" Series

7.0

52

Ranger

FS-6 Compressor

10.0

32

FX-15 Compressor

7.0

36

(1)

Total system capacity, unless otherwise noted.

(2)

Models with auxiliary unit may require additional refrigerant. See decal under hood for capacity.

Copyright 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.

Article GUID: A00039007

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HEATER SYSTEM

1990-92 HEATER SYSTEMS Ford Motor Co.

DESCRIPTION

The heater system consists of control panel, blower case, heater case, air control doors and ducts. The control panel incorporates 3 control
levers and a 3-speed fan switch. The control panel is located in the center of the instrument panel. All air control doors are cable operated
from the control panel.

The blower case is mounted on the bulkhead, behind the instrument panel on passenger's side of vehicle. The blower case houses a blower
motor, blower motor resistor and the fresh/recirculation air door. The heater case contains mode select door, temperature air mix door and
heater core.

OPERATION

Three control levers, temperature mix, fresh/recirculation and mode select, mechanically operate their associated cables and doors. The
temperature control lever adjusts the mix of fresh or recirculated air with heated air. In full heat position, all airflow goes through the heater
core.

In full cool position, the mix air door closes, allowing airflow to by-pass the heater core. The mode select lever, directs airflow to selected
vents. The fresh/recirculation control lever allows selection of fresh (outside) air or recirculated compartment air.

AJUSTMENT

FRESH/RECIRCULATION CONTROL CABLE

Remove the glove box. Remove fresh/recirculation cable retaining clip. Move control lever to RECIRCULATION position, while holding the
lever door in RECIRCULATION position. Ensure control lever does not move. Install fresh/recirculation cable retaining clip.

MODE SELECT CABLE

Remove mode select cable retaining clip. Move mode select lever to VENT position. Hold mode select lever downward against its stop.
Ensure that mode select lever does not move. Install mode select cable retaining clip.

TEMPERATURE CONTROL CABLE

Set temperature control lever to maximum cold position. Remove temperature cable retaining clip. Hold temperature control lever upward and
against its stop. Ensure that temperature lever does not move. Install temperature cable retaining clip.

TROUBLE SHOOTING

BLOWER MOTOR INOPERATIVE

Check blown motor fuse. Check for defective blower motor and/or blower motor resistor. Check blower motor switch. Check for open in
ground wire. Check for loose electrical connectors or poor connections. See

WIRING DIAGRAMS

in this article.

BLOWER DOES NOT CHANGE SPEED

Check for defective blower motor. Check blower motor wiring harness. Check blower motor resistor. Check for blower motor fan switch. See

WIRING DIAGRAMS

in this article.

BLOWER RUNS CONSTANTLY

Check for defective blower motor resistor. Check for short in blower switch or wiring. See

WIRING DIAGRAMS

in this article.

HEATER TEMPERATURE INSUFFICIENT

Check for proper coolant level. Check water pump for noise, leaks or wear. Check heater hoses for leaks or restrictions. Check heater core for
leaks, plugs or restrictions. Check inlet and outlet heater hoses for hot water flow. Check thermostat condition and operation. Check air mix
door position and adjust cable if necessary.

IMPROPER WARM AIR DISTRIBUTION

Check air mix door position. Adjust cable as necessary. Check function control door position. Adjust cable as necessary. Check for restriction
in ventilation air duct assembly. Repair as necessary.

TESTING BLOWER MOTOR & RESISTOR

1. Ensure 15-amp blower motor fuse is okay. Using voltmeter, check for battery voltage at blower motor Blue/Yellow terminal. If battery

voltage is present, go to next step. If battery voltage is not present, repair open in Blue/Yellow wire between blower motor and fuse box.

2. Disconnect blower motor connector. Using a jumper wire, apply battery voltage to Blue/Yellow terminal and ground the Blue/Red

terminal. If blower motor does not run, replace blower motor. If blower motor runs, go to next step.

3. Reconnect blower motor connector. Turn ignition on. Turn blower motor off. Disconnect the blower motor resistor connector. Using a

voltmeter, measure voltage at Blue/Red terminal of resistor connector. If battery voltage is not present, repair open in Blue/Red wire
between resistor and blower motor. If voltage is present, go to next step.

4. Using a jumper wire, ground Blue/Black, Blue/Yellow and Blue/White terminals of the blower fan switch one at a time. If the motor

runs at 3 different speeds, go to next step. If not, repair open in wire that failed to operate blower motor.