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HOMESERVICE MANUALSCHEVROLET1972CHEVELLE SS, 5.7L ENG VIN JREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING FLAT RATE
1972 Chevrolet Chevelle SS, 5.7L Eng VIN J
Air Conditioning Flat Rate
1972 Chevrolet Chevelle SS, 5.7L Eng VIN JSECTION Air Conditioning Flat Rate
- Discharge, Evacuate, Leak Test, Charge & Operational Test
- Evacuate, Leak Test & Charge System
- Add Partial Charge
- Weather Eye Control Assembly - Replace
- Weather Eye Control Cable - Replace
- Blower Switch - Replace
- A/C Blower Switch - Replace
- Blower Motor Resistor - Replace
- Heater Valve - Replace
- Heater Hose - Replace
- Heater Core & Blower Housing ASS'Y - R & R
- Blower Motor & Blower Wheel - Replace
- Blower Motor Relay And/Or Wire Harness - Replace
- Heater & Defroster Damper Housing - Replace
- Heater Core Housing - R & R
- Blower Housing - R & R
- Defroster Duct - Replace
- Defroster Bezel - Replace
- Evaporator & Housing Assembly - R & R
- A/C Discharge Duct - Replace
- Floor Cooling Door - Replace
- Damper Door Vacuum Motor - Replace
- Damper Door Vacuum Control - Replace
- Temperature Control Thermostat - Replace
- Vacuum Storage Tank-Replace
- A/C Temperature Override Switch-Replace
- A/C Micro-Switch - Replace
- Temperature Control Thermostat Capillary Tube - Inspects & Correct Installation & Make Confirming Road Test Upon Completion
- Expansion Valve - R & R
- A/C Idler Pulley - R & R
- A/C Drive Belt - Adjust
- A/C Back Idler Pulley - Replace
- Compressor & Clutch Assembly - R & R
- Compressor Front Bearing, Seal Plate & Seal Ring - Replace
- Compressor Bottom Plate Gasket - Replace
- Compressor Rear Bearing Plate Gasket - Replace
- Compressor Valve Plate - Replace
- Compressor Clutch Pulley - R & R Or Replace
- A/C Hose, Either - Replace
- Condenser - R & R
- Road Test To Verify Operation & Cooling Efficiency
- BUICK
- Notes
- Heater System Operations
- Cowl Air Vent Cables - R & R
- Heater Blower Motor - R & R
- Heater Blower Fan - R & R
- Heater Core - R & R
- Heater Blower Switch - R & R
- Heater Hoses - R & R
- Heater Blower Motor Resistor - R & R
- Heater Control Cable - R & R
- Defroster Control Cable - R & R
- Selector Vacuum Switch - R & R
- Heater Control Panel - R & R
- Defroster Outlet - R & R
- Rear Window Defroster Switch - R & R
- Rear Window Defroster Blower Motor - R & R
- Manual A/C System Operations
- Compressor Assembly - R & R
- Compressor Internal Cylinder ASS'Y - R & R Or R & R And Overhaul
- Compressor Front Head And/Or Shell ASS'Y - R & R
- Compressor Rear Head And/Or Oil Pump Gears - R & R
- Compressor Pressure Relief Valve - R & R
- Suction & Discharge Valve Assembly - R & R
- Compressor Front Seal, Seat, & O-Ring - R & R
- Compressor Coil & Housing Assembly - R & R
- Compressor Pulley & Bearing Assembly - R & R
- POA Valve - R & R
- Compressor Belts - R & R
- Expansion Valve Assembly - R & R
- Evaporator Core - R & R
- Condenser Assembly R & R
- Receiver - Drier Assembly - R & R
- Blower Motor - R & R
- Blower Motor Fan - R & R
- Control Cable(S) - R & R
- Manual A/C Control Assembly - R & R
- Blower Motor Relay R & R
- Blower Switch - R & R
- Compressor Ambient Switch - R & R
- Circuit Board - R & R
- Contact Selector - R & R
- Master Vacuum Switch - R & R
- Selector Vacuum Valve - R & R
- Manual A/C Water Valve Assembly - R & R
- Vacuum Tank R & R
- Refrigerant Liquid Hose Assembly - R & R
- Refrigerant Suction Hose Assembly - R & R
- Refrigerant Discharge Hose Assembly - R & R
- Distributor Duct - R & R
- A/C Outlet - R & R
- A/C Outlet Vanes - R & R
- Automatic A/C System Operations
- Master Vacuum Valve And/Or Microswitch - R & R
- Compressor Ambient Switch - R & R
- Control Assembly - R & R
- Programmer - R & R
- Vacuum Valve - R & R
- Blower Switch Contacts - R & R
- Blower Switch - R & R
- Transducer - R & R
- Amplifier & Feedback Pot Assembly - R & R
- Output Shaft - R & R
- Vacuum Checking Relay - R & R
- Circuit Board Assembly, Resistor, Blower - R & R
- CADILLAC
- Notes
- Evacuate & Charge A/C System
- Heating System Operations
- A/C System Operations
- Condenser - R & R Or Replace
- Receiver-Drier - R & R Or Replace
- Compressor - R & R
- Pulley & Bearing Assembly - R & R
- Clutch Coil - Replace
- Front Seal Assembly - Replace
- Rear Compressor Head, Oil Pump Gears And/Or Valve Assembly - Replace
- Internal Cylinder - R & R
- Evaporator Assembly - R & R
- A/C & Heater Air Selector Assembly - R & R
- Suction Throttling Valve - R & R Or Replace
- Expansion Valve - R & R Or Replace
- Blower Motor - R & R
- Liquid Line - Replace
- Hose - Replace
- O-Rings - Replace
- Control Head - R & R
- Power Servo Or Programmer - R & R Or Replace
- In-Car Sensor And/Or Temperature Switch - R & R Or Replace
- Ambient Switch And/Or Sensor Assembly - R & R Or Replace
- Engine Temperature Switch - R & R Or Replace
- Blower Motor Relay - Replace
- Outlet Grille - Replace
- CHEVROLET
- Heater System Operations
- A/C System Operations
- Notes
- Compressor Assembly - Replace
- Compressor Hub & Drive Plate - Replace
- Compressor Pulley Bearing - Replace
- Compressor Coil Housing Assembly - Replace
- Compressor Shaft Seal Assembly - Replace
- Compressor Charge Fitting - Replace
- Compressor Relief Valve - Replace
- Compressor Rear Head And/Or Reed Assembly - Replace
- Compressor Front Head And/Or Reed Assembly Replace
- Compressor Assembly - Overhaul
- Condenser - Replace
- Sight Glass - Replace
- Receiver-Drier - Replace
- Evaporator - Replace
- Evaporator Case - Replace
- Expansion Valve - Replace
- A/C Blower Motor - Replace
- A/C Blower Motor Switch - Replace
- A/C Blower Resistor - Replace
- A/C Relay - Replace
- A/C Clutch Switch (Low Blow) - Replace
- Ambient Temperature Switch - Replace
- A/C Control Assembly - Replace
- COMFORTRON Temperature Control Switch - Replace
- POA Valve - Replace
- In-Car COMFORTRON Sensor - Replace
- Ambient COMFORTRON Sensor & Switch - Replace
- COMFORTRON Programmer - Replace
- Thermal Vacuum Valve - Replace
- Vacuum Tank - Replace
- COMFORTRON Power Servo - Replace
- A/C Outlets And/Or Deflector - Replace
- Defroster Cable - Replace
- Diverter (Outlet) Door Cable - Replace
- Temperature Door Cable - Replace
- Plenum Valve Diaphragm (Outside Air) - Replace
- Kick Pad Valve (RECIRC Air) Diaphragm - Replace
- COMFORTRON Mode Shift Vacuum Diaphragm - Replace
- COMFORTRON Defroster Vacuum Diaphragm - Replace
- A/C Line, Receiver-Drier To Expansion Valve - Replace
- Hoses, Fittings & Muffler Assembly - Replace
- A/C Line, Condenser To Receiver-Drier - Replace
- CHEVROLET VEGA
- Heater System Operations
- A/C System Operations
- Notes
- Compressor Assembly - Replace
- Compressor Hub & Drive Plate - Replace
- Compressor Pulley And/Or Bearing - Replace
- Compressor Coil Housing Assembly - Replace
- Compressor Shaft Seal Assembly - Replace
- Compressor Relief Valve - Replace
- Compressor Rear Head And/Or Reed Assembly - Replace
- Compressor Front Head And/Or Reed Assembly - Replace
- Compressor Assembly - Overhaul
- Condenser-Replace
- Sight Glass - Replace
- Receiver-Drier - Replace
- Evaporator - Replace
- Evaporator Case - Replace
- Expansion Valve - Replace
- A/C Blower Motor - Replace
- A/C Blower Motor Switch - Replace
- A/C Resistor - Replace
- A/C Relay - Replace
- A/C Control Assembly - Replace
- POA Valve - Replace
- Vacuum Tank - Replace
- A/C Outlets And/Or Deflector - Replace
- Control Cable Operations
- CHRYSLER Corp.
- Notes
- A/C System - Charge
- Heater Core - Replace
- Water Valve Thermostat, ATC - Replace
- Water Valve - Replace
- Potentiometer, ATC - Replace
- A/C Housings - Replace
- Temperature Control Cable - Replace
- Blower Motor Switch - Replace
- Compressor Ambient Switch, ATC - Replace
- Ambient Sensor, ATC - Replace
- In-Car Sensor, ATC - Replace
- Blower Motor Resistor, ATC - Replace
- Wiring Harness, Instrument Panel - Replace
- Wiring Harness, ATC - Replace
- Evaporator Temperature Control Switch - Replace
- Master Switch, ATC - Replace
- Low Pressure Cut Off Switch - Replace
- Compressor Clutch Switch, ATC - Replace
- Vacuum Control Switch - Replace
- Vacuum Switch, Fresh Air Door, ATC - Replace
- Compressor Switch, Instrument Panel Control - Replace
- Cold Engine Lockout Switch - Replace
- Compressor Piston & Connecting Rod - Replace
- Compressor - Replace
- ETR Valve - Replace
- EPR Valve - Replace
- Check Valves, ATC - Replace
- Compressor Crankshaft - Replace
- Compressor Clutch Bearing - Replace
- Compressor Clutch Field Coil - Replace
- Compressor Oil Pump - Replace
- Compressor Oil Pump Seal - Replace
- Compressor Oil Sump - Replace
- Compressor Oil Sump Gasket - Replace
- Receiver-Drier - Replace
- Condenser - Replace
- Power Servo, ATC - Replace
- Evaporator Assembly, Roof Unit - Replace
- Sub Cooler - Replace
- ETR Switch, ATC - Replace
- Hoses & Tubes - Replace
- Center Air Outlet W/Housing - Replace
- Blower Motor - Replace
- Blower Motor Resistor - Replace
- Evaporator Core - Replace
- Expansion Valve - Replace
- Actuators, ATC - Replace
- Ford Motor Co.
- Heater System Operations
- Heater Servo Control Switch - Replace
- Air Door Vacuum Motor - Replace
- Heater Hose - Replace
- Defogger Motor - Replace
- Heater Water Valve - Replace
- Heater Core - Replace
- Defogger Switch - Replace
- Temperature Control Cable - Replace
- Heater Blower Motor - Replace
- Defroster Control Cable - Replace
- Heater Control Assembly - Replace
- Heater Switch - Replace
- Heater Blower Motor Resistor - Replace
- A/C System Operations
- Notes
- Evacuate, Charge, Pressure Test & Leak Test System
- Evacuate, Leak Test & Recharge A/C System
- Evaporator Thermostatic Switch - Replace
- Compressor Shaft Seal Kit - Replace
- Compressor Valve Plate - Replace
- Clutch Pulley Bearing - Replace
- Condenser Assembly - Replace
- Control Box, ATC - R & R Or Replace
- Ambient Sensor - Replace
- Compressor Valve Or Gasket - Replace
- A/C Blower Motor - Replace
- Hose, Receiver-Drier To Evaporator - Replace
- Hose, Evaporator To Compressor - Replace
- Hose, Compressor To Condenser - Replace
- Expansion Valve - Replace
- Receiver-Drier - Replace
- Evaporator Core - Replace
- Pressure Relief Valve - Replace
- Compressor Assembly - Replace
- A/C Temperature Control Switch - Replace
- A/C Blower Motor Switch - Replace
- Heater System Operations
- OLDSMOBILE
- Notes
- Heater System Operations
- A/C-Heater System Control Units
- Control ASS'Y Attaching Parts - R & R
- Control ASS'Y 8. Attaching Parts, COMFORTRON - R & R
- Wiring Harness, Relays, Circuit Breaker - R & R
- Blower Motor Resistor (Except COMFORTRON) - R & R
- COMFORTRON Temperature Control Units - R & R
- COMFORTRON Programmer And/Or Actuating Link - R & R
- Vacuum Diaphragm - R & R
- Temperature Control Cable - R & R
- Vacuum Tank, Vacuum Hose - R & R
- Switch Adjustment
- Heater Hoses, Water Valve - R & R
- Refrigeration System Operations
- Compressor Belt - Adjust
- Compressor Clutch Driven Plate, Pulley, Bearing, Clutch Coil - R & R
- Compressor Front Seal
- Compressor Assembly
- "O" Rings - R & R
- Sight Glass And/Or Gasket - R & R
- Compressor Mounting Bracket - R & R
- Refrigerant Lines, Valve Cores - R & R
- Refrigerant Lines - Repair
- Superheat Shut-Off Switch - R & R
- Receiver-Drier - R &R
- Condenser - R & R
- Expansion Valve - R & R
- A/C Leak Check
- POA Valve - R & R
- Evaporator ASS'Y - R & R
- A/C Performance Test
- Partial Charge A/C System
- Comfort RON Test
- Air Distribution System
- PONTIAC
- Notes
- Lower Level Ventilation System Operations
- Upper Level Ventilation System Operations
- Heater System Operations
- Heater Core - Replace
- Heater Case - Replace
- Blower Speed Switch - Replace
- Heater Hose - Replace
- Heater Wiring Harness - Replace
- Heater Wiring Harness - Repair
- Heater Blower Motor Resistor - Replace
- Heater Control Diaphragms - Replace
- Vacuum Hose Harness - Replace Or Repair
- Defroster Nozzle - Replace
- Heater Defroster Cable - Replace
- Air De-Ice Cable - Replace
- Heater Air Inlet Cable - Replace
- Temperature Cable - Replace
- Temperature Door Cam ASS'Y - Replace
- Heater Control Panel - R & R
- A/C System Operations
- Notes
- Compressor ASS'Y - Replace
- Compressor Shaft Seal - Replace
- Clutch Hub & Armature Plate - Replace
- Pulley Or Bearing - Replace
- Clutch Coil - Replace
- POA Valve & Seals - Replace
- Compressor Belt - Replace
- Expansion Valve & Seals - Replace
- Evaporator Case - Replace
- Evaporator Drain Hose - Replace
- Condenser & Seals - Replace
- Receiver-Drier - Replace
- Air Inlet & Valve ASS'Y - Replace
- A/C Blower Motor And/Or Impeller - Replace
- A/C Blower Motor Cooling Tube - Replace
- A/C-Heater Core - Replace
- A/Cheater Case - Replace
- Cam Assembly, Temperature Door - Replace
- Temperature Door - Replace
- Temperature Cable - Replace
- Control ASS'Y - Replace
- Hi Blower Relay - Replace
- Blower Speed Switch - Replace
- Compressor Clutch Switch - Replace
- De-Ice Switch - Replace
- Master Switch - Replace
- Blower Motor Resistor - Replace
- Wiring Harness - Replace, Repair
- Vacuum Harness - Replace
- Vacuum Extension Harness - Replace
- Master Relay - Replace
- Defroster Vacuum Diaphragm - Replace
- Diverter Vacuum Diaphragm - Replace
- Air Inlet Vacuum Diaphragm - Replace
- Plenum Air Inlet Vacuum Diaphragm - Replace
- Evaporator Purge Vacuum Diaphragm - Replace
- Receiver To Expansion Valve Hose & Coupling - Replace
- POA Valve To Compressor Hose - Replace
- Muffler To Compressor Hose - Replace
- O-Ring Seals - Replace
- Condenser To Receiver Hose & Coupling - Replace
- Hose Clamp - Replace
- Muffler & Compressor Fitting ASS'Y - Replace
- Muffler ASS'Y - Replace
- Compressor Fitting ASS'Y - Replace
- SCHRADER Valve - Replace
- Cold Air Duct - R & R
- Air Outlet Duct - Replace
- Outlet Nozzle (Deflector) - Replace
- Upper Air Outlet Duct - Replace
- Lower Extension Duct - Replace
- Ambient Sensor (Automatic Air) Or Ambient Switch (Custom Air) - Replace
- Heater Hose - Replace
- In-Car Sensor - Replace
- Door Link Adjustment
- Potentiometer - Replace
- Low (Purge) Blower Relay - Replace
- Auto (Blower On) Relay - Replace
- Engine Thermal (Temperature) Switch - Replace
- Programmer - R & R
- Bi-Level Boost Switch - Replace
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.