1998 Mercury Grand Marquis A/C & Heater Service (ONLINE REPAIR MANUALS)

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A/C & HEATER SERVICE PROCEDURES FOR 1998 Mercury Grand Marquis AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Mercury Grand Marquis cars and light trucks from 1990+

Air Bag System Precautions -> Ford Motor Co. -> Disarming -> 1990-91 -> 1990-92 -> 1991-92 -> 1992-93 -> 1992-94 -> 1992-96 -> 1993 -> 1993-94 -> 1993-95 -> 1994 -> 1994-95 -> 1994-97 -> 1995-2000 -> 1995-2004 -> 1995-96 -> 1995-97 -> 1995-98 -> 1996-97 -> 1996-99 -> 1997-2000 -> 1997-2001 -> 1997-2004 -> 1997-99 -> 1998 -> 1998-2000 -> 1998-2002 -> 1999-2000 -> 1999-2001 -> 1999-2002 -> 1999-2004 -> 2000 -> 2000-01 -> 2000-04 -> 2001-02 -> 2001-03 -> 2001-04 -> 2002-03 -> 2002-04 -> 2004 -> Aerostar & Bronco -> Aspire -> Aviator -> Blackwood, Expedition & Navigator -> Built After February 2002 -> Built Before March 2002 -> Capri -> Continental -> Contour & Mystique -> Cougar -> Crown Victoria, Grand Marquis & Marauder -> Econoline -> Escape -> Escort, Tracer & ZX2 -> Excursion -> Explorer & Mountaineer -> Explorer Sport & Sport Trac -> F Series -> Focus -> Freestar & Monterey -> Light Trucks & Vans -> LS -> Mark VII -> Mark VIII -> Mustang -> Passenger Cars -> Probe -> Ranger -> Sable & Taurus -> Tempo & Topaz -> Thunderbird -> Town Car -> Villager -> Windstar
Vehicle: 1998 Mercury Grand Marquis 4.6 V8 GAS

Passenger Cars

Prior to disconnecting battery, record preset radio frequencies.

After the battery has been disconnected and connected again, abnormal drive conditions may be present while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.

Aspire
  • Disconnect battery ground cable and isolate.
  • Wait one minute for back-up power supply to deplete stored energy.
  • Remove four driver's side air bag module mounting bolts.
  • Disconnect driver's side air bag module...

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A/C & HEATER SERVICE PROCEDURES FOR 1998 Mercury Grand Marquis AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Mercury Grand Marquis cars and light trucks from 1990+

Automatic Temperature Control Systems Diagnosis & Testing -> Technical Service Bulletins -> Poor Or No A/C Cooling On Passenger Or Driver Vent -> Action -> Issue -> LS
Vehicle: 1998 Mercury Grand Marquis 4.6 V8 GAS

LS
Issue

This may be caused by debris trapped in the coolant valve and/or the DA...

CLICK HERE TO GET FULL ACCESS TO 1998 Mercury Grand Marquis A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Mercury Grand Marquis AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Mercury Grand Marquis cars and light trucks from 1990+

Module Configuration Procedure -> Ford Motor Company -> 1992-1998
Vehicle: 1998 Mercury Grand Marquis 4.6 V8 GAS

Some modules will require configuration after being installed on the vehicle. All configurable modules will be packaged in a kit which contains a warning label and multi-language sheet which lists requirements to configure the modules.

There are two types of configuration data. The first type is used by the module so that it can interact with the vehicle correctly. The second type is customer preference driven. These are items that the customer may or may not want to have enabled. To program customer driven preferences, a Ford service function card (FSF) and the New G...

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A/C & HEATER SERVICE PROCEDURES FOR 1998 Mercury Grand Marquis AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Mercury Grand Marquis cars and light trucks from 1990+

General Service Domestic Vehicles -> 1998-2000 -> System Inspection -> Compressor -> Condenser -> Evaporator -> Receiver-Drier/Accumulator -> Refrigerant Line Restrictions -> Thermostatic Expansion Valve
Vehicle: 1998 Mercury Grand Marquis 4.6 V8 GAS

While a detailed diagnostic procedure for all air conditioning systems would be impractical due to the many variations in construction and operation, there are three fundamental components of a total diagnosis:

  • Refrigerant systems must have an adequate, but not excessive charge.
  • Determination must be made whether the refrigerant system is governed by a cycling clutch compressor or by valves which control evaporator pressure.
  • The air distribution system (blower motor, switches, vacuum lines and air ducts) must be operational before checking the ...

CLICK HERE TO GET FULL ACCESS TO 1998 Mercury Grand Marquis A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Mercury Grand Marquis AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Mercury Grand Marquis cars and light trucks from 1990+

Component Replacement & Adjustment -> Passenger Cars -> Vacuum Control Motors, Replace -> Air Inlet -> Air Inlet Duct -> Air Recirculation -> Cold Air Bypass -> Continental & Mark VIII -> Contour & Mystique -> Cougar -> Crown Victoria, Grand Marquis & Town Car -> Defrost Door -> Defrost/Floor Air Flow Control -> Defrost/Panel -> Escort & Tracer -> Five Passenger Rear Seat Duct -> Floor Console Register -> Floor Duct -> Floor/Panel -> Focus -> Heater A/C Inlet Duct -> Heater Air Damper -> Heater/A/C Air Inlet Duct -> Inlet Duct -> LS -> Mustang -> Panel Air Flow Control -> Panel/Defrost -> Panel/Floor -> Rear Seat Duct (Five Passenger) -> Recirculate/Fresh -> Recirculation Air Duct -> Recirculation/Fresh -> Sable & Taurus -> Supplemental A/C Damper -> Windshield Defroster
Vehicle: 1998 Mercury Grand Marquis 4.6 V8 GAS

Do Not Bend Any Part Of The Vacuum Control Motor Lever, Lever Is Brittle And Will Break.

Continental & Mark VIII
Inlet Duct
  • Remove A/C recirculating air duct.
  • Remove inlet duct door control motor mounting screws.
  • Pivot vacuum control motor out and away from housing.
  • Reverse procedure to install.
Windshield Defroster
  • Remove instrument panel as outlined under "Instrument Panel."
  • Remove vacuum harness and mounting screws for vacuum motor.
  • Rotate vacuum control motor and remove from linkage.
  • ...

CLICK HERE TO GET FULL ACCESS TO 1998 Mercury Grand Marquis A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Mercury Grand Marquis AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Mercury Grand Marquis cars and light trucks from 1990+

Air Bag System Precautions -> Ford Motor Co. -> Arming -> 1990-91 -> 1990-92 -> 1991-92 -> 1992-93 -> 1992-94 -> 1992-96 -> 1992-98 -> 1993 -> 1993-94 -> 1993-95 -> 1994 -> 1994-95 -> 1994-96 -> 1994-97 -> 1995 -> 1995-2004 -> 1995-96 -> 1995-98 -> 1996-97 -> 1996-99 -> 1997-2000 -> 1997-2001 -> 1997-2004 -> 1997-99 -> 1998 -> 1998-2000 -> 1998-2002 -> 1999-2000 -> 1999-2001 -> 1999-2002 -> 1999-2004 -> 2000 -> 2000-01 -> 2000-04 -> 2001-02 -> 2001-03 -> 2001-04 -> 2002-03 -> 2002-04 -> 2004 -> Aerostar & Bronco -> Aspire -> Aviator -> Blackwood, Expedition & Navigator -> Built After February 2002 -> Built Before March 2002 -> Capri -> Continental -> Contour & Mystique -> Cougar -> Crown Victoria Grand Marquis & Marauder -> Econoline -> Escape -> Escort, Tracer & ZX2 -> Excursion -> Explorer & Mountaineer -> Explorer Sport & Sport Trac -> F Series -> Focus -> Freestar & Monterey -> Light Trucks & Vans -> LS -> Mark VII -> Mark VIII -> Mustang -> Passenger Cars -> Probe -> Ranger -> Sable & Taurus -> Tempo & Topaz -> Thunderbird -> Town Car -> Villager -> Windstar
Vehicle: 1998 Mercury Grand Marquis 4.6 V8 GAS

Passenger Cars

Aspire
  • Disconnect battery ground cable.
  • Wait one minute for back-up power supply to deplete stored energy.
  • Remove restraint system diagnostic tool from driver's side air bag module electrical connector.
  • Connect driver's side air bag module electrical connector.
  • Install driver's side air bag module as outlined under "Component Service."
  • Remove restraint system diagnostic tool from passenger's side air bag module electrical connector.
  • Install passenger's side air bag module as outlined under "Component Service."
  • C...

CLICK HERE TO GET FULL ACCESS TO 1998 Mercury Grand Marquis A/C & HEATER SERVICE PROCEDURES

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