Content .. 390 391 392 393 ..

Honda Odyssey 2004. Manual - part 392

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21-44

Heating/Air Conditioning

Dust and Pollen Filter Replacement

The dust and pollen filter should be replaced every
30,000 miles (48,000 km) or 24 months whichever
comes first. Replace the filter more often if the airflow is
less than usual.

1. Remove the glove box (see page 20-71).

2. Cut the plastic cross brace in the glove box opening

with diagonal cutters in the area shown, and
discard it.

3. Remove the bolts, the screws and the glove box

frame.

4. Remove the filter lid (A) from the evaporator, then

pull out the dust and pollen filter (B).

5. Install the filter in the reverse order of removal.

Make sure that there is no air leaking out of the
evaporator.

6. Install the glove box frame and glove box in the

reverse order of removal.

Cut here.

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21-45

Blower Unit Removal and
Installation

Blower Unit Component
Replacement

6 x 1.0 mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)

6 x 1.0 mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)

SRS components are located in this area. Review the
SRS component locations, ’99-01 models (see page 23-
18), ’02 model (see page 23-19), ’03-04 models (see
page 23-20), and the precautions and procedures (see
page 23-21) before performing repairs or service.

1. Make sure you have the anti-theft code for the radio

and the navigation system, then write down the
frequencies for the radio’s preset buttons.

2. Disconnect the negative cable from the battery.

3. Remove the evaporator (see page 21-42).

4. Remove the front passenger’s airbag (see page 23-

370).

5. Disconnect the connectors (A) from the blower

motor, the blower resister and the recirculation
control motor, then remove the wire harness clips
(B). Remove the mounting nuts, the mounting bolt
and the blower unit (C).

6. Install the unit in the reverse order of removal, and

note these items:

• Make sure that there is no air leakage.
• For evaporator and A/C-related infomation, refer

to evaporator removal and installation (see page
21-42).

• Do the PCM idle learn procedure (see page 11-

202).

• Do the power window control unit resetting

procedure (see page 22-200).

• Enter the anti-theft code for the radio and the

navigation system, then enter the customer’s
radio station presents.

Note these items when overhauling the blower unit:

• The recirculation control motor (A), the blower

resistor or power transistor (B) and the blower motor
(C) can be replaced without removing the blower unit.

• Before reassembly, make sure that the recirculation

control linkage and doors move smoothly without
binding.

• After reassembly, make sure the recirculation control

motor runs smoothly (see page 21-39).

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21-46

Heating/Air Conditioning

Heater Unit/Core Replacement

8 x 1.25 mm
13 N·m (1.3 kgf·m, 9.4 lbf·ft)

1. Make sure you have the anti-theft code for the radio

and the navigation system, then write down the
frequencies for the radio’s preset buttons.

2. Disconnect the negative cable from the battery.

3. From under the hood, open the cable clamp (A),

then disconnect the heater valve cable (B) from the
heater valve arm (C). Turn the heater valve arm to
the fully opened position as shown.

4. When the engine is cool, drain the engine coolant

from the radiator (see page 10-13).

5. Slide the hose clamps (A) back, then disconnect the

inlet heater hose (B) and the outlet heater hose (C)
from the heater unit. Engine coolant will run out
when the hoses are disconnected; drain it into a
clean drip pan. Be sure not to let coolant spill on
the electrical parts or the painted surfaces. If any
coolant spills, rinse it off immediately.

6. Remove the mounting nut from the heater unit.

Take care not to damage or bend the fuel lines and
the brake lines, etc.

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21-47

6 x 1.0 mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)

7. Remove the dashboard (see page 20-69).

8. Remove the evaporator (see page 21-42).

9. Remove the mounting bolts and the heater unit.

10. Remove the self-tapping screws and the clamp (A),

then carefully pull out the heater core (B) so you
don’t bend the inlet and outlet pipes.

11. Install the heater core in the reverse order of

removal.

12. Install the heater unit in the reverse order of

removal, and note these items:

• Do not interchange the inlet and outlet heater

hoses, and install the hose clamps securely.

• Refill the cooling system with engine coolant (see

page 10-13).

• Adjust the heater valve cable (see page 21-48).
• Make sure that there is no coolant leakage.
• Make sure that there is no air leakage.
• For evaporator and A/C-related information, refer

to evaporator remove and installation (see page
21-42).