1991 FORD FESTIVA heating

REFRIGERANT RECOVERY/RECYCLING
Refrigerant recovery/recycling equipment is used to remove refrigerant from vehicle's A/C system without polluting atmosphere. To remove
and recycle refrigerant, connect the recovery/recycling system and follow instructions provided with the system.
The removed refrigerant is filtered, dried and stored in a tank within the recovery/recycling system until it is ready to be pumped back into the
vehicle's A/C system. With refrigerant stored in the recovery/recycling system, A/C system can be opened without polluting atmosphere.
Montero(13) (13)
Pickup & Ram-50(10) (11)
Precis(12) (12)
Stealth & 3000GT(1) (1)
Daihatsu(4) (5)
Ford Motor Co.(4) (5)
General Motors & Geo(1) (1)
Honda(4) (5)
Hyundai
Elantra(4) (5)
Excel & Scoupe(12) (12)
Sonata(10) (11)
In fin it i(4) (5)
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Jaguar(4) (5)
Lexus(4) (5)
Mazda
B2200 & B2600i(8) (8)
Miata(4) (5)
Navajo(6) (7)
All Others(1) (1)
Mercedes-Benz(4) (5)
Nissan(4) (5)
Porsche
1989-92 Carrera 911 2/4(8) (8)
Saab(8) (8)
Subaru
Legacy & Loyale(4) (5)
SVX(9) (9)
Suzuki(4) (5)
Toyota
Pickup & 4Runner(13) (13)
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All Others(4) (5)
Volkswagen(4) (5)
Volvo(4) (5)
(1)Information is not available from manufacturer.
(2)On high pressure line (near receiver-drier on Legend; on receiver-drier on Vigor). Use High-Side Adapter (J-25498).
(3)On low pressure line (near right side of condenser on Legend).
(4)On high pressure (discharge) hose/line.
(5)On low pressure (suction) hose/line.
(6)On high pressure line, between compressor and condenser.
(7)On suction accumulator/drier.
(8)On low and high pressure hoses, behind compressor.
(9)On receiver/drier and low pressure hose (near compressor).
(10)On compressor high pressure (discharge) hose.
(11)On compressor low pressure (suction) port.
(12)On compressor discharge hose and accumulator.
(13)On compressor discharge and suction ports.
(14)Remove high pressure cut-out switch to expose high pressure service valve.
(15)Remove low pressure switch to expose low pressure service valve.
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NOTE:Separate sets of hoses, gauges and refrigerant recovery/recycling equipm ent MUST be used for R-12
and R-134a based system s. DO NOT m ix R-12 and R-134a refrigerants, as their refrigerant oils and
desiccants are NOT com patible. On system s with R-134a refrigerant, use Polyalkylene Glycol (PAG)
wax-free refrigerant oil.
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00039025
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Back To Article
1991 AIR CONDIT IONING & HEAT
MANUAL A/C
A/C SYSTEM SPECIFICATIONS
SPECIFICATIONS
DESCRIPTION
This A/C-heater system is fully integrated to provide cooling, heating and ventilation with either fresh or recirculated air. A/C system is
expansion valve type. Interior air temperature is controlled by cycling the compressor on and off at different rates. A/C compressor is protected
by a low pressure switch, which stops compressor operation when refrigerant pressure is too low. Compressor operation is cut when throttle is
wide open to improve driveability.
The primary system components are compressor, receiver-drier, evaporator, low pressure switch, thermostatic switch, thermostatic expansion
valve, A/C control module, refrigerant lines and air ducts. See Fig. 1
and Fig. 2 . The heater core is continuously supplied with coolant. To
control temperature, air goes through and/or around heater core by way of temperature blend door.

Fig. 1: Identifying A/C System Components

Courtesy of FORD MOTOR CO. CAUT ION: When discharging air conditioning system , use only approved refrigerant recovery/recycling
equipm ent. Make every attem pt to avoid discharging refrigerant into the atm osphere.
ApplicationSpecification
Compressor TypeNippondenso 10-Cylinder
Refrigerant (R-12) Capacity25 ozs.
System Oil Capacity10 ozs.
Compressor Belt Deflection
New9/32-11/32" (8-9 mm)
Used11/32-7/16" (9-11 mm)
System Operating Pressure (1)
Low Side19-25 psi (1.3-1.7 kg/cm2 )
High Side199-220 psi (13.9-15.4
kg/cm
2 )
(1)When measured at 79°F (26°C).
Page 1 of 14 MITCHELL 1 ARTICLE - 1991 AIR CONDITIONING & HEAT MANUAL A/C
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1. Inspect wiring and components for shorts, corrosion, overheating, loose connections, or any other damage. Check 10-amp METER fu se.
Disconnect downshift solenoid.
2. With key off, voltage measured at Black/Blue wire should be zero volts. With key on and accelerator pedal fully depressed, voltage
should be greater than 10 volts. If Black/Blue wire is okay, remove downshift solenoid.
3. Apply battery voltage to downshift solenoid connector and ground case. Control rod should move freely when solenoid case is
grounded. If control rod does not move freely, replace downshift solenoid.
VACUUM DIAPHRAGM ROD
If transaxle shift points are incorrect, check for a defective vacuum diaphragm and replace if necessary. If diaphragm is operating correctly,
check length of diaprhagm rod using Vacuum Diaphragm Rod Gauge (T87C-77000-A). Measure dimension "N." See Fig. 5
. Select proper
length diaphragm rod. See VACUUM DIAPHRAGM ROD SELECTION
table.
VACUUM DIAPHRAGM ROD SELECTION

Fig. 5: Adjusting Vacuum Diaphragm Rod Length

Courtesy of MAZDA MOTORS CORP.
Dimension "N" In. (mm)Rod Length In. (mm)
Below 1.000 (25.4)1.16 (29.5)
1.000-1.020 (25.4-25.9)1.18 (30.0)
1.020-1.039 (25.9-26.4)1.20 (30.5)
1.039-1.059 (26.4-26.9)1.22 (31.0)
Over 1.059 (26.9)1.24 (31.5)
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00124558
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