Rear AC do not work, but fridge does
Thread Starter
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Joined: Feb 2022
Posts: 44
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From: SP
Rear AC do not work, but fridge does
Hi guys,
I noticed the other day that the rear AC system on my 2003 UL LS430 is not working properly and is presenting an unusual behavior.
- The two vents located behind the passenger seat do not blow cold air when AC and LO or HIGH is on.
- However, the fridge does get cold air on those modes.
- When I turn off rear AC button (ie green led is off) and keep green led ON under LO button, I do get a cold breeze coming out only from the left rear vent behind the left head rest, but no cold air in the fridge.
So it seems air blowing cold in some modes but not in others. I would assume AC pipes are working ok, but something else is preventing a normal working condition in all modes.
Does anyone has had this problem or has a hunch what the problem might be?
thanks in advance!
I noticed the other day that the rear AC system on my 2003 UL LS430 is not working properly and is presenting an unusual behavior.
- The two vents located behind the passenger seat do not blow cold air when AC and LO or HIGH is on.
- However, the fridge does get cold air on those modes.
- When I turn off rear AC button (ie green led is off) and keep green led ON under LO button, I do get a cold breeze coming out only from the left rear vent behind the left head rest, but no cold air in the fridge.
So it seems air blowing cold in some modes but not in others. I would assume AC pipes are working ok, but something else is preventing a normal working condition in all modes.
Does anyone has had this problem or has a hunch what the problem might be?
thanks in advance!
Racer
Joined: Mar 2018
Posts: 1,286
Likes: 391
From: ESSEX, UK
Did you set the AC temperature from the back seat controls? Remember that it is a 4 zone AC system with separate controls for all 4 seats.
If the fridge is working then the rear cooling circuit is working but the rear heat exchanges for the vents could be clogged or the vents themselves may be not opening.
If the fridge is working then the rear cooling circuit is working but the rear heat exchanges for the vents could be clogged or the vents themselves may be not opening.
Thread Starter
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Joined: Feb 2022
Posts: 44
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From: SP
Hey bigboomer,
Thank you for replying.
I tested it out today controlling the rear AC from the back controls. The problem is the same:
- In LO mode, the rear left vent works, but the right does not. Fridge does not work. Everything is totally silent
- In AC LO, none of the rear vents work, but fridge does work. Weird noise comes from the right rear vent (sound file attached)
- In AC HI, none of the rear vents work, but fridge does work. Weird noise comes from the right rear vent.
It seems weird that the left vent opens in one mode, but not in the others. Should I take it to the dealership?
Thank you for replying.
I tested it out today controlling the rear AC from the back controls. The problem is the same:
- In LO mode, the rear left vent works, but the right does not. Fridge does not work. Everything is totally silent
- In AC LO, none of the rear vents work, but fridge does work. Weird noise comes from the right rear vent (sound file attached)
- In AC HI, none of the rear vents work, but fridge does work. Weird noise comes from the right rear vent.
It seems weird that the left vent opens in one mode, but not in the others. Should I take it to the dealership?
Racer
Joined: Mar 2018
Posts: 1,286
Likes: 391
From: ESSEX, UK
If there isn't even a warm wind coming out of the rear vents I would suspect a blocked/damaged blower motor.
https://lexus-europe.epc-data.com/ls...color=8P8&trim
https://lexus-europe.epc-data.com/ls...color=8P8&trim
Thread Starter
Rookie
Joined: Feb 2022
Posts: 44
Likes: 7
From: SP
If there isn't even a warm wind coming out of the rear vents I would suspect a blocked/damaged blower motor.
https://lexus-europe.epc-data.com/ls...color=8P8&trim
https://lexus-europe.epc-data.com/ls...color=8P8&trim
Any clue about the weird noise in the attached file?
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