Flushing the air con system
Thread Starter
Driver
Joined: Aug 2012
Posts: 134
Likes: 0
From: SG
Flushing the air con system
Hi all, I tried searching but seems like it was not discussed before. My GS is 3.5 years old, in Singapore, a hot and humid climate all year long with 2-3 months of hazy(somethime PSI can reach a level of 200+)period due to agriculture, land clearing fires in neighbouring Indonesia. Although the air con is working fine, I have been contemplating on doing some maintenance as I intend to keep the GS for a long while. However checking the Lexus manual, there isn't any recommendation of flushing the system. Google'd and saw an (old) article from aa which mentioned that "Chrysler and Toyota do not recommend flushing. If an A/C system is contaminated and contains debris, Chrysler says replace the condenser and hoses."
Is this necessary and has anyone did before could share their experience and if it was effective or this fit into the "isn't broken don't fix it" category? thanks!
PS: The only thing I DIY is replacing the filter very 10,000KM
Is this necessary and has anyone did before could share their experience and if it was effective or this fit into the "isn't broken don't fix it" category? thanks!
PS: The only thing I DIY is replacing the filter very 10,000KM
Lexus Champion
Joined: Nov 2014
Posts: 13,614
Likes: 2,914
From: Texas
The A/C is a closed system. The refrigerant cannot escape (except in the case of a leak) and contaminants cannot enter the system. Your A/C should never (ever) need refrigerant to be added (because it is a closed system), thus there is no need for it to ever be flushed because the refrigerant does not wear out. Just replace the cabin air filter as often as you feel is necessary and make sure the condensation line remains open so it can drain.
Pole Position
Joined: Apr 2012
Posts: 2,243
Likes: 88
From: Texas
My AC smells like mold for the first 30 seconds when turning it on ever since I picked up my GS. I know your suppose to move it out of recirculate mode and to fresh air before turning the unit off, but it doesnt help. What do yall recommend I do for that?
Lexus Test Driver
Joined: Feb 2013
Posts: 5,822
Likes: 1,062
From: California
Mine is like that too and I already blasted the heat on max for like half an hour and the next day it's back like that again. Maybe I have to blast the heat some more.
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Lexus Test Driver
Joined: Feb 2013
Posts: 5,822
Likes: 1,062
From: California
try this. i did it like once a year and have no problem since.
https://www.youtube.com/watch?gl=SG&...&v=VrVc_FXrbHY
https://www.youtube.com/watch?gl=SG&...&v=VrVc_FXrbHY
Do u get any nasty residue on the grille where u spray it?
Pole Position
Joined: Sep 2015
Posts: 332
Likes: 3
From: California
There's actually a TSB on this, but like the guy mentioned in the video.. it'll keep coming back regardless especially if you live in hot humid areas. If you go to a nice dealership then they may clean out the system for you. Not flush the ac system, but clean out the area where the air gets sucked in and pushed out into the cabin.
Lexus Test Driver
Joined: Aug 2013
Posts: 1,295
Likes: 14
From: Texas
This guy is halfway right. Most evaporators these days are buried in the dash, sometimes at an angle that retains moisture, so stuff does grow on it. However, hosing down the intake at the windshield isn't the best way to kill the odor. There's a re-circulation intake near the floor (and physically close to the evaporator) where the spray should be used. Furthermore, hosing down the outside intake will probably just soak your interior air filter, (which is paper), possibly damaging it and causing you to replace it sooner than usual.
Also, keep tree limbs, leaves, and other moldy junk away from the intake near the windshield. If it sits there for any amount of time, those spores get sucked into the dash and sit on the evaporator and in the duct work, where they spawn plenty of funk.
Disclaimer: I have no connection with this website or product, but their instruction picture gets it right. http://www.autogeek.net/cleanair.html
Also, keep tree limbs, leaves, and other moldy junk away from the intake near the windshield. If it sits there for any amount of time, those spores get sucked into the dash and sit on the evaporator and in the duct work, where they spawn plenty of funk.
Disclaimer: I have no connection with this website or product, but their instruction picture gets it right. http://www.autogeek.net/cleanair.html
