bode

How To Find An Replace A/c Evaporator On 1999 Ls400

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Does anyone have any threads or info on how to locate and replace evaporator on 1999 LS400. I believe you have to remove the entire dash, but not sure. Any help or tutorial on this?

Thanks for any help

Bode

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Steve,

Thanks for the post. The only concern is that my year is different than the one on this thread. If I can get the evaporator out by only removing the glove box, that would be great. I heard you had to take entire dash off. Does anyone know if you can do it like what's in this thread from an earlier year, i.e, through glove box.

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I tried to send the complete thing but it was too big.. hope this helps..

you can replace the BLOWER unit thru glove box, BUT EVAPORATOR is instrument panel removal


REMOVE INSTRUMENT PANEL AND REINFORCEMENT

(See page BO–83)

7. REMOVE BLOWER UNIT

(See page AC–31)

8. REMOVE A/C UNIT

(a) Disconnect the connectors.

( B) Remove the rear heater ducts.

© Remove the wire harness set bolts.

(d) Remove the 2 nuts, bolt and A/C unit.



DISASSEMBLY

1. REMOVE THESE PARTS:

(a) Wire harness

( B) Air mix servomotors

© Water valve control servomotor

(d) Air outlet servomotors

(e) Aspirator

(f) Cool air bypass damper control servomotors

2. REMOVE HEATER RADIATOR

(a) Remove the 2 screws and 2 clamps.

( B) Pull out the heater radiator.

© Remove the 2 screws, 2 clamps and heater radiator

pipes.

(d) REmove the 2 O–rings.

HINT:

At the time of reassembly, please refer to the following item.

Do not reuse the 2 O–rings.

3. REMOVE LIQUID AND SUCTION TUBE

Using a hexagon wrench, remove the 3 bolts and tube.

Torque: 5.4 N·m (55 kgf·cm, 48 in.·lbf)

HINT:

Lubricate 2 new O–rings with compressor oil and install the

tube,

4. DISASSEMBLE LIQUID AND SUCTION TUBE


(a) Pry out the packing.

HINT:

At the time of reassembly, please refer to the following item.

Do not reuse the packing.

( B) Using a hexagon wrench, remove the bolt and valve.

Torque: 5.4 N·m (55 kgf·cm, 48 in.·lbf)

HINT:

At the time of reassembly, please refer to the following item.

Lubricate a new O–ring with compressor oil and install the

valve


© Remove the holder and disconnect the heat sensing tube

of expansion valve.

(d) Loosen the 2 nuts and remove the expansion valve.

Torque:

19 mm nut : 14 N·m (140 kgf·cm, 10 ft·lbf)

24 mm nut : 23 N·m (230 kgf·cm, 17 ft·lbf)

HINT:

At the time of reassembly, please refer to the following item.

Lubricate 2 new O–rings with compressor oil and install the

valve.



AIR CONDITIONING – AIR CONDITIONING UNIT

AC–27

Author: Date: 2272

2000 LEXUS LS400 (RM717U)

5. REMOVE EVAPORATOR

(a) Remove the 7 screws and evaporator cover.

( B) Pull out the evaporator.

6. REMOVE EVAPORATOR TEMPERATURE SENSOR

7. REMOVE AIR VENT DUCT

8. REMOVE HEATER CASE.

(a) Remove the 7 screws and heater case.

( B) Remove 2 screws and made seal case.

© Using a screwdriver, release the 3 claws and separate the

heater cases.

HINT:

Tape the screwdriver tip before use.





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