Basic System (HVAC): Removal & Installation Mazda 3 BL

A/C Unit Installation Nut Removal Note

Note. If the adjusting bolt rotates when removing the A/C unit nut, keep rotating the nut. The adjusting bolt stops rotating when it contacts the A/C unit and the nut can be removed.

Scheme 16

1. When replacing the A/C unit or evaporator, add compressor oil to the refrigerant cycle. Supplemental oil amount (approx. quantity) 25 ml {25 cc, 0.8 fl oz}
2. Tighten the A/C unit adjusting bolt until it lightly touches the A/C unit.

Scheme 17

1. install the clip as shown in the figure.

Scheme 18

1. Disassemble in the order indicated in the table. CAUTION: If a non-specified grease is used, it may result in abnormal noise or improper operation of the links. Apply only the specified grease to each link.
2. Assemble in the reverse order of disassembly.

Scheme 19

1. Attach the sensor clamp as shown in the figure.

Scheme 20

1. Assemble the evaporator temperature sensor as shown in the figure.

Airflow Mode Main Link Installation Note

Scheme 21

Scheme 22

1. Push and hold each airflow mode sub link in the direction of the arrow.
2. Set the airflow mode main link to the A/C unit as shown in the figure.
3. Press the airflow mode main link lightly to the A/C unit it in the direction shown by the arrow, then set the projections of each airflow mode sub link into the grooves of the airflow mode main link.
4. Rotate airflow mode main link and verify that each mode is accessed properly.

Scheme 23

1. Disconnect the negative battery cable.
2. Remove the following parts: Front seat (See «FRONT SEAT REMOVAL/INSTALLATION»(ref-345253-S02590681772009102000000) .) Audio amplifier (Bose) (See «AUDIO AMPLIFIER REMOVAL/INSTALLATION»(ref-345255-S40225728582009102000000) .) Woofer (Bose) (See «WOOFER REMOVAL/INSTALLATION»(ref-345255-S23874645842009102000000) .) Front scuff plate (See «FRONT SCUFF PLATE REMOVAL/INSTALLATION»(ref-345251-S03552764762009102000000) .) Console (See «CONSOLE REMOVAL/INSTALLATION»(ref-345251-S09223885732009102000000) .) Front side trim (See «FRONT SIDE TRIM REMOVAL/INSTALLATION»(ref-345251-S39582742522009102000000) .) Rear scuff plate (See «REAR SCUFF PLATE REMOVAL/INSTALLATION»(ref-345251-S34770097052009102000000) .) B-pillar lower trim (See «B-PILLAR LOWER TRIM REMOVAL/INSTALLATION»(ref-345251-S05968899652009102000000) .) Lower anchor of the front seat belt (See «FRONT SEAT BELT REMOVAL/INSTALLATION»(ref-345252-S37398683842009102000000) .) Tire house trim (See «TIRE HOUSE TRIM REMOVAL/INSTALLATION»(ref-345251-S27657366472009102000000) .) Fuel-filler lid opener lever cover (See «FUEL-FILLER LID OPENER REMOVAL/INSTALLATION»(ref-345243-S01830456282009102000000) .) Floor covering (See «FLOOR COVERING REMOVAL/INSTALLATION»(ref-345251-S23482529582009102000000) .)
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.

Scheme 24

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See «REFRIGERANT CHARGING»(ref-345268-S40252650632009102000000) .)
3. Remove the right side splash shield and mudguard.
4. Loosen the drive belt and remove it. (See «DRIVE BELT REMOVAL/INSTALLATION [L3 WITH TC]»(ref-345224-S04793494252009102000000) .) CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise will occur. Always immediately plug open fittings after removing any refrigeration cycle parts to keep moisture or foreign material out of the cycle.
5. Remove in the order indicated in the table. Do not allow compressor oil to spill.
6. Install in the reverse order of removal.
7. Adjust the drive belt.
8. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345268-S33795605272009102000000) .)

A/C Compressor Installation Note

Scheme 25

1. Rotate new A/C compressor shaft six to eight revolutions while collecting refrigerant oil in a clean measuring device. Use this refrigerant oil to refill new compressor. Do not allow refrigerant oil to become contaminated.
2. Rotate old A/C compressor shaft six to eight revolutions while collecting refrigerant oil in a separate, clean measuring device.
3. Compare those oil amounts. The amount of the oil drained from the new A/C compressor should be greater than the old one.
4. Pour the same amount oil of drained from the old A/C compressor back into the new A/C compressor. A/C compressor oil type ATMOS GU10 A/C compressor oil sealed volume (approx. quantity) 150 ml {150 cc, 5.07 fl oz}

Scheme 26

1. Disconnect the negative battery cable.
2. Discharge the refrigerant. (See «REFRIGERANT CHARGING»(ref-345268-S40252650632009102000000) .)
3. Remove the splash shield.
4. Remove the A/C drive belt. (See «DRIVE BELT REPLACEMENT [LF, L3]»(ref-345205-S18707332462009102000000) .)
5. Detach the two wiring harness clamps.
6. Disconnect the magnetic clutch connector.
7. Remove the A/C compressor protector.
8. Disconnect the cooler hose (LO) and cooler hose (HI). Do not allow remaining compressor oil in the refrigerant line to spill. (See «REFRIGERANT LINES REMOVAL/INSTALLATION [LF, L3]»(ref-345211-S19727411202009102000000) ). CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
9. Remove the compressor protector.
10. Remove in the order indicated in the table. Do not allow remaining compressor oil in the A/C compressor to spill. CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
11. Install in the reverse order of removal.
12. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345268-S33795605272009102000000) .)

Scheme 27

1. Rotate new A/C compressor shaft six to eight revolutions while collecting refrigerant oil in a clean measuring device. Use this refrigerant oil to refill new compressor. Do not allow refrigerant oil to become contaminated.
2. Rotate old A/C compressor shaft six to eight revolutions while collecting refrigerant oil in a separate, clean measuring device.
3. Compare those oil amounts. The amount of the oil drained from the new A/C compressor should be greater than the old one.
4. Pour the same amount oil of drained from the old A/C compressor back into the new A/C compressor. A/C compressor oil type ATMOS GU10 A/C compressor oil sealed volume (approx. quantity) 150ml {150cc, 5.07 fl oz}

Scheme 28

1. Disconnect the negative battery cable.
2. Discharge the refrigerant. (See «REFRIGERANT CHARGING»(ref-345268-S40252650632009102000000) .)
3. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT [LF, L3]»(ref-345218-S35273147202009102000000) .) (See «ENGINE COOLANT REPLACEMENT [L3 WITH TC]»(ref-345232-S19309368322009102000000) .)
4. Remove the air cleaner. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [LF, L3]»(ref-345212-S03134740962009102000000) .) (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3 WITH TC]»(ref-345225-S13656146802009102000000) .)
5. Remove the splash shield.
6. Disconnect the cooler hose (HI) and cooler pipe. Do not allow remaining compressor oil in the refrigerant line to spill. (See «REFRIGERANT LINES REMOVAL/INSTALLATION [LF, L3]»(ref-345211-S19727411202009102000000) ). CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
7. Disconnect the radiator hose from the radiator.
8. Remove the cooling fan.
9. Remove the radiator with the condenser installed. (See «RADIATOR REMOVAL/INSTALLATION [LF, L3]»(ref-345218-S29634696342009102000000) .) (See «RADIATOR REMOVAL/INSTALLATION [L3 WITH TC]»(ref-345232-S33868723212009102000000) .)
10. Release the radiator hook and pull the condenser up, being careful not to allow remaining compressor oil in the condenser to spill. (See «CONDENSER INSTALLATION NOTE»(ref-345211-S26075423762009102000000) ). CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise or other malfunction could occur. Always plug open fittings immediately after removing any refrigeration cycle parts.
11. Install in the reverse order of removal.
12. Inspect for engine coolant leakage. (See «ENGINE COOLANT LEAKAGE INSPECTION [LF, L3]»(ref-345218-S37398212532009102000000) .) (See «ENGINE COOLANT LEAKAGE INSPECTION [L3 WITH TC]»(ref-345232-S40937403772009102000000) .)
13. Perform the refrigerant system performance test. (See «REFRIGERANT SYSTEM PERFORMANCE TEST»(ref-345268-S33795605272009102000000) .)

Condenser Installation Note

1. After replacing the condenser, add compressor oil to the refrigeration cycle. Supplemental oil amount (approx. quantity) 20 ml {20 cc, 0.7 fl oz}

Refrigerant Line Installation Note

1. Apply compressor oil to the O-rings and connect the joints.
2. Tighten the joints.

Scheme 29

1. Tighten the bolt of joint by hand.
2. Connect the block joint type pipes by grasping the female side of the block with pliers or similar tool and holding firmly, then tighten the connection bolt or nut with a torque wrench.

Scheme 30

1. Connect the male pipe or hose by twisting it onto female pipe until the garter spring at the male pipe or hose is over the flared end of female pipe. NOTE: When the male pipe or hose is replaced, the indicator ring comes out after connecting to indicate that it is locked.