Camary 2003, Remove floor air duct to drop blower motor.

Here's a great How To video that will also show you how to replace it.">

Here are the instructions with a diagram. If you need to enlarge the diagram save it to your picture files and then enlarge it there.

1. Disconnect battery ground cable, then drain cooling system. See: Engine, Cooling and Exhaust\Cooling System\Service and Repair

2. Disconnect heater hoses from heater core. Plug heater hoses and core fittings to prevent coolant spillage.

3. Remove bolt located below windshield wiper motor, attaching left end of plenum to dash panel.

4. Remove nut attaching upper left corner of evaporator or heater case to dash panel.
5. Disconnect vacuum control system supply hose from vacuum source, then push grommet and hose into passenger compartment.

6. Remove all instrument panel retaining screws and pull instrument panel back as far as possible without disconnecting any wire harnesses.
7. Loosen right door sill plate and remove side cowl trim panel.

8. Disengage temperature control cable housing from bracket on top of plenum. Disconnect cable from temperature blend door crank arm.

9. On models w/Automatic Temperature Control (ATC) , remove cross body brace and disconnect wiring harness from temperature blend door actuator and disconnect ATC sensor tube from evaporator case connector.
10. Disconnect vacuum harness at vacuum connector near floor air distribution duct.

11. Disconnect white vacuum hose from outside recirculating air door vacuum motor.
12. Remove two hush panels.

13. Remove one plastic push fastener retaining floor air distribution duct to left end of plenum. Remove left screw and loosen right screw on rear face of plenum. Remove floor air distribution duct.

14. Remove two screws from rear side of floor air distribution duct to plenum. To remove right screw, it may be necessary to remove the two screws attaching lower panel door vacuum motor to mounting bracket.

15. Remove push fastener attaching floor air distribution duct to left end of plenum, then remove floor air distribution duct.
16. Remove two nuts located along lower flange of plenum.
17. Carefully move plenum rearward, so that heater core tubes and plenum case upper stud clear openings in dash panel, then remove plenum from vehicle by rotating upper portion of the plenum forward, down and out from under instrument panel. It may be necessary to carefully pull lower edge of instrument panel rearward while plenum is being removed from behind instrument panel.
18. Remove retaining screws from heater core cover, then the cover from plenum assembly.

19. Remove retaining screw from heater core inlet and outlet tube bracket.

Heater core removal and installation diagram.






20. Pull heater core and seal assembly from plenum assembly.
21. Reverse procedure to install.

I would repair the problem if I have to disassemble the varioius parts to get at the air doors --- In-Vehicle Temperature Sensor Removal & Installation To Remove:
In-vehicle temperature sensor

1. Remove the climate control head.
2. While pressing the retaining tabs inward, remove the in-car temperature sensor.

To Install:

1. While pressing the retaining tabs inward, install the in-car temperature sensor.
2. Install the climate control head.

---
Air Door Actuators/Motors Removal & Installation Air Inlet Door (Recirculation) Vacuum Motor To Remove:

1. Remove the instrument panel.
2. Remove the air inlet door motor mounting screws. CAUTION
   Do not attempt to bend any part of the air inlet duct door lever.
   
3. Rotate and remove the air inlet door vacuum control motor.

To Install:

1. Rotate and install the air inlet door vacuum control motor.
2. Install and tighten the mounting screws.
3. Install the instrument panel.

Defroster Door Vacuum Motor To Remove:

1. Remove the passenger air bag module from the instrument panel.
2. Disconnect the vacuum line and remove the mounting screws. CAUTION
   Do not attempt to bend any part of the defroster airflow mode door lever.
   
3. Rotate and remove the vacuum control motor from the defrost door lever.

To Install:

1. Rotate and install the vacuum control motor on the defrost door lever.
2. Install and tighten the mounting screws.
3. Connect the vacuum line to the vacuum control motor.
4. Install the passenger's air bag module.

Floor Console Register Duct Vacuum Motor To Remove:

1. Remove the floor console.
2. Remove the right-side instrument panel insulator.
3. Working from the passenger's footwell, disconnect the vacuum hose.
4. Remove the screws and the floor console register duct vacuum control motor. CAUTION
   Do not attempt to bend any part of the floor console register duct door lever.
   
5. Rotate and remove the vacuum control motor from the floor console register duct door.

To Install:

1. Rotate and install the vacuum control motor onto the floor console register duct door.
2. Install and tighten the mounting screws.
3. Connect the vacuum hose to the floor console register duct vacuum control motor.
4. Install the insulator under the dash.
5. Install the floor console.

Panel/Floor (Heater Air Damper) Door Vacuum Motor To Remove:
Panel/floor door vacuum control motor shield

1. Working through the driver footwell, remove the two screws and the shield. CAUTION
   Do not attempt to bend any part of the airflow mode door lever.
   
2. Label and disconnect the two vacuum hoses.
3. Remove the vacuum control motor mounting screws.
4. Lift, rotate and remove the panel/floor (heater air damper) door vacuum control motor from the door lever.

To Install:

1. Install the panel/floor (heater air damper) door vacuum control motor on the door lever.
2. Install and tighten the mounting screws.
3. Connect the vacuum hoses in their original positions.
4. Install the shield on the vacuum motor.

Temperature Blend Door Actuator To Remove:

1. Remove the integrated control panel.
2. Remove the right-side lower instrument panel insulator.
3. Lower the glove compartment.
4. If equipped with Electronic Automatic Temperature Control (EATC), remove the 2 remote climate control module screws and position the module aside.
5. Remove the temperature blend door linkage shield.
6. Disconnect the temperature blend door electrical connector.
7. Remove the temperature blend door actuator mounting screws.
8. Remove the temperature blend door actuator.

To Install:

1. Position the temperature blend door actuator on the plenum.
2. Install the temperature blend door actuator mounting screws.
3. Connect the temperature blend door electrical connector.
4. Install the temperature blend door linkage shield.
5. If equipped with Electronic Automatic Temperature Control (EATC), reposition the remote climate control module and install the 2 mounting screws.
6. Raise the glove compartment.
7. Install the right-side lower instrument panel insulator.
8. Install the integrated control panel.

The blend door is not working right or the in car air temperature sensor is faulty.
Removal & Installation Air Inlet Door Vacuum Motor To Remove:

1. Remove the instrument panel.
2. Remove the air inlet door motor mounting screws. CAUTION
   Do not attempt to bend any part of the air inlet duct door lever.
   
3. Rotate and remove the air inlet door vacuum control motor.

To Install:

1. Rotate and install the air inlet door vacuum control motor.
2. Install and tighten the mounting screws.
3. Install the instrument panel.

Defroster Door Vacuum Motor To Remove:

1. Remove the passenger air bag module from the instrument panel.
2. Disconnect the vacuum line and remove the mounting screws. CAUTION
   Do not attempt to bend any part of the defroster airflow mode door lever.
   
3. Rotate and remove the vacuum control motor from the defrost door lever.

To Install:

1. Rotate and install the vacuum control motor on the defrost door lever.
2. Install and tighten the mounting screws.
3. Connect the vacuum line to the vacuum control motor.
4. Install the passenger's air bag module.

Floor Console Register Duct Vacuum Motor To Remove:

1. Remove the floor console.
2. Remove the right-side instrument panel insulator.
3. Working from the passenger's footwell, disconnect the vacuum hose.
4. Remove the screws and the floor console register duct vacuum control motor. CAUTION
   Do not attempt to bend any part of the floor console register duct door lever.
   
5. Rotate and remove the vacuum control motor from the floor console register duct door.

To Install:

1. Rotate and install the vacuum control motor on the floor console register duct door.
2. Install and tighten the mounting screws.
3. Connect the vacuum hose to the floor console register duct vacuum control motor.
4. Install the insulator under the dash.
5. Install the floor console.

Panel/Floor Door Vacuum Motor To Remove:

1. Working through the driver footwell, remove the two screws and the shield. CAUTION
   Do not attempt to bend any part of the airflow mode door lever.
   
2. Label and disconnect the two vacuum hoses.
3. Remove the mounting screw.
4. Lift, rotate and remove the panel/floor door vacuum control motor from the door lever.

To Install:

1. Install the panel/floor door vacuum control motor on the door lever.
2. Install and tighten the mounting screw.
3. Connect the vacuum hoses in their original positions.
4. Install the shield on the vacuum motor.

Auxiliary Air Distribution Blend Door Actuator To Remove:

1. Remove the right rear quarter trim panel access panel. Auxiliary climate control housing removal and installation
   
   
2. Remove the auxiliary air distribution blend door actuator screws.
3. Disconnect the auxiliary air distribution blend door actuator connector.

To Install:

1. Connect the auxiliary air distribution blend door actuator connector.
2. Install the auxiliary air distribution blend door actuator screws.
3. Install the right rear quarter trim panel access panel.

Auxiliary Temperature Blend Door Actuator To Remove:

1. Remove the right rear quarter trim panel. Auxiliary climate control housing removal and installation
   
   
2. Disconnect the temperature auxiliary temperature blend door actuator connector.
3. Remove the temperature auxiliary temperature blend door actuator screws.
4. Remove the temperature auxiliary temperature blend door actuator.

To Install:

1. Install the temperature auxiliary temperature blend door actuator.
2. Install the temperature auxiliary temperature blend door actuator screws.
3. Connect the temperature auxiliary temperature blend door actuator connector.
4. Install the right rear quarter trim panel.

--- In-Car Temperature Sensor Removal & Installation To Remove:

1. Remove the instrument cluster finish panel.
2. Disconnect the in-vehicle temperature sensor connector.
3. Disconnect the in-vehicle temperature sensor aspirator tube.
4. Remove the in-vehicle temperature sensor screws.
5. Remove the in-vehicle temperature sensor.

To Install:

1. Install the in-vehicle temperature sensor.
2. Install the in-vehicle temperature sensor screws.
3. Connect the in-vehicle temperature sensor aspirator tube.
4. Connect the in-vehicle temperature sensor connector.
5. Install the instrument cluster finish panel.

Blower Motor Removal & Installation Front To Remove:
NOTE: The blower motor is positioned on the passenger side of the vehicle beneath the instrument panel, and can be removed from the vehicle without removing the HVAC housing.

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Remove or disconnect the following:
   • Negative battery cable
   • Passenger side cowl trim panel
   • Carpet to access the front upper screw that secures the air inlet housing
   • Recirculation door actuator
   • Recirculation door actuator wire lead from the routing clip located on the lower air inlet housing and position the wire lead aside
   • Blower motor wire lead connector from the blower motor resistor or power module, depending on application. Lower Air Inlet Housing
     
     
   • One screw (from the top) that secures the lower air inlet housing to the upper air inlet housing
   • Four screws (from the bottom) that secure the lower air inlet housing to the upper air inlet housing and remove the lower HVAC housing Blower Motor Wire Lead Grommet
     
     
3. Feed the rubber blower motor wire lead grommet through the opening in the lower air inlet housing.
4. Push the blower motor wire lead through the opening in the lower air inlet housing and remove the lower air inlet housing from the vehicle.
5. Place the recirculation-air door as needed to access and remove the three screws that secure the blower motor to the lower half of the HVAC housing.
6. Lightly bend the recirculation air door far enough down to remove the blower motor and wheel from the HVAC housing. Blower Motor Mounting Tabs
   
   
7. Remove the blower motor and wheel from the HVAC housing. Make a note of the location of the blower motor mounting tabs.

To Install:

1. Install or connect the following:
   • Blower motor and wheel to the lower half of the HVAC housing and line up the blower motor mounting tabs to the correct location on the HVAC housing
   • Blower motor and wheel into the HVAC housing by lightly bending the recirculation-air door far enough down
   • Three screws that secure the blower motor to the HVAC housing by positioning the recirculation-air door as needed
     1. Torque to: 17 inch lbs. (2 Nm)
   • Blower motor wire lead through the opening in the lower air inlet housing and seat the rubber grommet into the lower air inlet housing
   • Recirculation-air door pivot into the lower air inlet housing
   • Four screws (from the bottom) that secure the lower air inlet housing to the upper air inlet housing and the lower HVAC housing
     1. Torque to: 17 inch lbs. (2 Nm)
   • One screw (from the top) that secures the lower air inlet housing to the upper air inlet housing
     1. Torque to: 17 inch lbs. (2 Nm)
   • Blower motor wire lead connector to the blower motor resistor or power module, depending on application
   • Recirculation door actuator wire lead into the routing clip located on the lower air inlet housing
   • Recirculation door actuator
   • Carpet
   • Passenger side cowl trim panel
   • Negative battery cable
2. Perform the heater-A/C control calibration procedure.

Rear To Remove:
NOTE: The rear blower motor and blower wheels are repaired only as a balanced unit. The entire blower motor and wheel assembly must be replaced if either component is fault or damaged.

1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
2. Remove or disconnect the following:
   • Front center floor console cover
   • Negative battery cable Rear Blower Motor Housing
     
     
   • Body wire harness connectors from the rear blower motor power module and the rear mode door actuator
   • Body wire harness bracket from the console support bracket
   • Eight screws and the two console support brackets from the floor console base and duct assembly
   • Four screws that secure the rear blower motor housing to the floor console base and duct assembly
   • Rear blower motor housing and place it on a bench
   • Rear blower motor wire harness connector from the power module
   • Eleven retaining clips and three screws that secure the housing together
   • Two halves of the housing
   • Blower motor wire harness and grommet from the housing and remove the blower motor

To Install:

1. Install or connect the following:
   • Rear blower motor into the housing and install the blower motor wire harness and grommet
   • Two halves of the rear blower motor housing and install the eleven retaining clips and three screws
     1. Torque to: 17 inch lbs. (2 Nm)
   • Rear blower motor wire harness connector to the rear blower motor power module
   • Rear blower motor housing into the floor console
   • Four screws that secure the rear blower motor housing to the floor console base
     1. Torque to: 17 inch lbs. (2 Nm)
     2. Two console support brackets onto the floor console base
     3. Eight screws that secure the support brackets to the floor console base
        1. Torque to: 17 inch lbs. (2 Nm)
     4. Body wire harness bracket onto the console rear support bracket
     5. Body wire harness connectors to the rear blower motor power module and the rear mode door actuator
     6. Negative battery cable
     7. Front center floor console
2. Calibrate the A/C-heater control.

Look ,behind the glove box,on top of the hac box,toward the center of the truck,it is a flat box,with a multiple wire plug in it,it is the temp door actuator motor,that turns as you select the cold,to hot selection,it may not be turning all the way for hot.You can remove this motor,and turn it,yourself to see,it is hard to do,because it is ressesed in the box.

big job, dificulty 8 on a 10 scale Heater Air Plenum Chamber Removal

1. Remove heater outlet floor duct (18C433) as described.
   

1. Remove instrument panel (04320). Refer to Section 01-12 .
   

Instrument Panel SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Radio Removing Tool 415-001 (T87P-19061-A)
Removal and Installation

1. Disconnect battery ground cable (14301).
   

1. Remove RF wheel and tire assembly. Refer to Section 04-04 .
   

1. Remove three nuts in radiator coolant recovery reservoir area.
   

1. Remove bolt retaining front fender apron (16054) to front fender (16005) .
   

1. Position front fender splash shield out of the way.
   

1. Lower vehicle.
   

1. Tag and remove main harness connector from jumper harness (located in front of blower motor).
   

1. Remove steering column. Refer to Section 11-04 .
   

1. Remove RH cowl side trim panel (02344) and LH cowl side trim panels (02345) .
   

1. Tag and disconnect wiring connectors in LH and RH cowls.
   

1. Remove ground wire located on LH cowl side.
   

1. Remove RH instrument panel upper moulding (04268) and LHinstrument panel moulding (04389) from instrument panel (04320) by pulling away from instrument panel and snapping out of retainers. Disconnect wiring connectors as required.
   

1. Remove glove compartment (06010).
   

1. Remove instrument panel upper finish panel (044A90) and disconnect the A/C sunload sensor (19E663) and anti-theft indicator, if equipped.
   

1. Disconnect the heater water hoses (18472) from the heater core tubes. Plug the ends of the heater water hoses to prevent coolant loss.
   

1. Plug heater core tubes securely to prevent coolant leakage from heater core (18476).
   

1. Remove one nut retaining the upper LH corner of the A/C evaporator core housing (19A559) to the dash panel (01610) .
   

1. Disconnect two vacuum supply hoses from vacuum source. Push grommet and vacuum supply hose into passenger compartment.
   

1. Disconnect wiring harness from A/C electronic blend door actuator.
   

1. Disconnect the white vacuum hose from the heater and A/C air inlet duct door vacuum control motor (18A318).
   

1. Remove nuts from the studs along the lower flange of the heater air plenum chamber (18471).
   

1. Disconnect connectors to A/C electronic blend door actuator and electronic module on side of heater air plenum chamber.
   

1. Remove heater air plenum chamber by pulling rearward.
   

Heater Air Plenum Chamber and Air Inlet Duct





Item Part Number Description 1 19C836 Suction Accumulator/Drier 2 56956-S2 Screw (2 Req'd) 3 386877-S36 Screw 4 45445-S36 Nut and Washer Assy 5 19C928 A/C Recirculating Air Duct Screen 6 386877-S36M Screw (2 Req'd) 7 45332-S12 Nut and Washer 8 19B762 A/C Air Inlet Door Inner Seal 9 19C590 A/C Recirculating Air Duct 10 18471 Heater Air Plenum Chamber 11 18C433 Heater Outlet Floor Duct 12 55734-S2 Nut 13 19A559 A/C Evaporator Core Housing 14 45332-S2 Nut and Washer A — Tighten to 2.5-3.2 Nm (23-28 Lb-In)
Installation

1. Route the vacuum supply hose through the dash panel and seat the grommet in the opening.
   

1. Position the heater air plenum chamber under the instrument panel with the A/C register duct opening up and the heater core tubes down. Connect wire harness connector to A/C electronic blend door actuator and electronic module on side of heater air plenum chamber .
   

1. Rotate the heater air plenum chamber up behind the instrument panel and position the heater air plenum chamber to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the A/C evaporator core housing.
   

1. Install three nuts on the studs along the lower flange and one on the upper flange of the heater air plenum chamber.
   

1. Install three nuts below the windshield wiper motor (17508) to retain the LH end of the heater air plenum chamber to the dash panel.
   

1. Install one nut to retain the upper LH corner of the A/C evaporator core housing to the dash panel .
   

1. Connect the white vacuum hose to the heater and A/C air inlet duct door vacuum control motor.
   

1. Connect the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the heater outlet floor duct. Install heater outlet floor duct.
   

1. Connect the sensor tube to the evaporator case connector on EATC-equipped vehicles.
   

1. Connect vacuum supply hose to vacuum supply.
   

1. Unplug the heater core tubes and connect the heater water hoses to the heater core tubes.
   

1. Fill the cooling system with coolant to replace coolant lost during removal of the heater air plenum chamber.
   

1. Install heater outlet floor duct as described.
   

1. Install instrument panel. Refer to Section 01-12 .
   

Section 12-03A: Air Conditioning System—Manual A/C-Heater 1998 Crown Victoria, Grand Marquis Workshop Manual
REMOVAL AND INSTALLATION Heater Core Removal
NOTE: If a heater core leak is suspected, the heater core must be pressure leak tested before it is removed from the vehicle. Refer to Section 12-00 .

1. Remove the heater air plenum chamber (18471) assembly as described.
   

1. Remove the heater dash gasket (18570) from the heater air plenum assembly.
   

1. Remove the four retaining screws from the heater core cover (18B300) and remove the heater core cover from the heater air plenum chamber assembly.
   

When the engine is cold,check the coolant level.

Make sure it's on max.

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A coolant system should be flush every two years.

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If you did a coolant flush recently then air pocket can be the cause of the un-even heating problem.

The DIY method is to drive you car onto a ramp or a steep hill.

Iet the engine cool off and top off the coolant tank.

Set MAX heat + MAX fan

Let the engine ran for 20 minutes wih the cap off and the trap air will escape from the coolant reserve tank,

Check coolant level and top off coolant when the engine cools down.



A shop will charge $75+ for this but using an air operated excavate tool!

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A car with over 90K miles may experience linkage problem to the heater control valve.

The heater control valve (near the firewall) may be stick over time.

Open the hood and move the heater to max and min. Back and forth.

Clean and lube the linkage with WD-40 to free the heater control valve.

If it's a vacuum type heater control valve then cash for leaky vac. hoses.


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Move the fan switch back and forth to re-new the electrical conductors.

Pass a vacuum over the control panel to prevent dust build up behind the console.

Remove cover under dash on passenger side & look for plug in duct work with wires going in & out of it. usually held in by one or 2 screws. Remove screw(s) and resistor should pull out.

This is an easy solution. Remove the glove box door strap and remove the glove box door by letting it drop towards the floor while supporting the door and it will release from the dash. Then you will see the blower motor housing along the firewall on the interior. You will just need to unplug the wires to the motor and remove a few screws and carefully remove the motor with the blower cage attached to it. Then just reverse the process and you will be good.