Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Rear Evaporator-Heater Unit Component Replacement
2001 Honda Odyssey LXSECTION Rear Evaporator-Heater Unit Component Replacement
NOTE:
- The rear mode control motor can be replaced without removing the rear evaporator-heater unit.
- Replace all O-rings, and coat them with refrigerant oil before installation.
- Install the capillary tube (K) directly against the outlet line and wrap it with electrical tape (L).
- Before reassembly, make sure that the rear mode control doors and linkage move smoothly without binding.
- After reassembly, make sure the rear mode control motor runs smoothly (see Rear Mode Control Motor Test ).
- Make sure that there is no coolant leakage.
- Make sure that there is no air leakage.
- Remove the self-tapping screws and the clamp (A), then remove the bolts and the evaporator lines (B) together with the expansion valve (C). If necessary, remove the expansion valve. Use a second wrench to hold the other fitting on the valve so the evaporator lines won't twist. Leave the first fitting loosely connected so you can use it to hold the valve while you loosen the second fitting.
- Remove the self-tapping screws and the clamp (D), then be careful not to bend the inlet and outlet pipes during the heater core (E) removal, and pull out the heater core.
- Remove the self-tapping screws and the rear mode control motor (F).
- Remove the self-tapping screws and the lower housing (G).
- Remove the self-tapping screws, carefully separate the right housing (H) from the left housing (I), then remove the evaporator core (J).
- Reassemble the unit in the reverse order of disassembly.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.