1993 BMW 740I A/C & Heater Service (ONLINE REPAIR MANUALS)

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A/C & HEATER SERVICE PROCEDURES FOR 1993 BMW 740I 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 1993 BMW 740I cars and light trucks from 1990+

BMW -> Manual Air Conditioning & Heater System Diagnosis & Testing -> DESCRIPTION -> 325 -> A/C Compressor Switch -> Air Center Control Lever -> Air Down Control Lever -> Air Up Control Lever -> Air Volume Control Switch -> Fresh Air/Bypass Air Switch -> REFRIGERATION SYSTEM -> SYSTEM CONTROL -> Temperature Control
Vehicle: 1993 BMW 740I 4.0 V8 GAS

REFRIGERATION SYSTEM

Switching ON the A/C system will activate the refrigerant circuit, Fig. . The solenoid coil receives power, producing a magnetic field causing the armature clutch plate to be pulled, and which is fixed onto the compressor shaft next to an inner plate operating freely on the same shaft. The compressor increases refrigerant vapor pressure, which is drawn into the suction end of the compressor assembly. The refrigerant is then compressed, raising refrigerant vapor temperature. The high pressure vapors pass through a high pressure line to a condenser loc...

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A/C & HEATER SERVICE PROCEDURES FOR 1993 BMW 740I 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 1993 BMW 740I cars and light trucks from 1990+

Imported Cars & Light Trucks & Vans -> 1993-95 -> Evacuating System -> Using Charging Station -> With Vacuum Pump
Vehicle: 1993 BMW 740I 4.0 V8 GAS

With Vacuum Pump

Vacuum pumps suitable for removing air and moisture from A/C systems are commercially available. A specification for system pump down used here is 28-291/2 inches vacuum. This reading can be attained at or near sea level only. For each 1000 feet of altitude this operation is performed, the reading will be 1 inch vacuum higher. For example, at 5000 feet elevation, only 23-241/2 inches of vacuum can be obtained. The system refrigerant must be completely recovered before it can be evacuated. Damage to the vacuum pump will result if pressurized refrige...

CLICK HERE TO GET FULL ACCESS TO 1993 BMW 740I A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1993 BMW 740I 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 1993 BMW 740I cars and light trucks from 1990+

Serpentine Drive Belt Routing -> Imported Passenger Cars, Light Trucks & Vans -> BMW
Vehicle: 1993 BMW 740I 4.0 V8 GAS

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CLICK HERE TO GET FULL ACCESS TO 1993 BMW 740I A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1993 BMW 740I 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 1993 BMW 740I cars and light trucks from 1990+

Imported Cars & Light Trucks & Vans -> 1993-95 -> Discharging System
Vehicle: 1993 BMW 740I 4.0 V8 GAS

R-134a systems require the use of special service equipment designed specifically for R-134a systems. R-12 servicing equipment cannot be used on R-134a systems.

R-12 recovery stations cannot be used on R-134a systems. A separate recovery station must be used on R-134a systems. The refrigerants are not compatible and will contaminate the R-12 recovery station.

The use of refrigerant recovery and recycling stations allows the recovery and reuse of refrigerant after contaminants and moisture have been removed.

When using a recovery or recycling station, follow t...

CLICK HERE TO GET FULL ACCESS TO 1993 BMW 740I A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1993 BMW 740I 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 1993 BMW 740I cars and light trucks from 1990+

Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Imported Vehicles
Vehicle: 1993 BMW 740I 4.0 V8 GAS

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CLICK HERE TO GET FULL ACCESS TO 1993 BMW 740I A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1993 BMW 740I 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 1993 BMW 740I cars and light trucks from 1990+

Air Bag System Precautions -> BMW -> Disarming
Vehicle: 1993 BMW 740I 4.0 V8 GAS

Prior to disconnecting any air bag/Supplemental Restraint System (SRS) electrical connectors, servicing any system components or other components located near an SRS electrical connector, the system must be disarmed. The connectors and components are identified by their orange color.

  • Obtain radio theft protection code prior to disconnecting battery.
  • Disconnect grou...

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