DIY cleaning evaporator helps ac cooling!!! - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #1 of 39 (permalink) Old 07-06-2011, 12:42 AM Thread Starter
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DIY cleaning evaporator helps ac cooling!!!

First: You will need to remove the glove box. There is two tabs on the bottom of the glove box. all you do is slide the tabs out. And then open the glove box. red arrows is where you'll find the tabs. ofcourse the glove box is already removed on this picture. dont mind my ipod,usb, and ps3 wires. i had them stored in my glove box.



next you will need to remove the glove box framing. total of 6 screws required to be removed.



I removed on extra one here didnt know which screw it was. But just follow the arrows.



Next: You need to remove the fan. 3 bolts to remove the screw. arrows in red. i believe its a 5.5mm that i used. I used a nut driver but a socket will do if you got one that small. ok you will also need to remove the one screw thats holding the wire in place. blue arrow. if you dont remove this you will have to force the wire out of the way. i choose to remove the screw instead dont want to break anything. this is a size 7mm. and last for this fan remove the fan harness. yellow arrow.



If you try to use a mirror and flashlight you might not have any luck looking in there. very small room to move around. Once the fan is removed you will need to look or take pictures in the fan mount housing you should be able to stick your hand in there and feel the evaporator. This is how my evaporator looked like when i first started. with all this dirt it blocked most of the air being blown through the evap. i cleaned my evap about 14 months ago and installed a cabin microfilter and it still got this dirty.



I went to home depot and bought this ac flow evap coil cleaner. i used this cleaner because it has a hose and i can insert just the trigger in there and spray with the bottle not in my way. got to remember there isnt that much room. i never used the spray can i figured i couldnt clean the evap good enough with the spray can because of room issues.



1st attempt to spray clean the evap. depending how dirty your evap is. is how many times you need to clean it. i sprayed mine twice.


keep spray til you think you got everything.


I let it set the first time for about 10-15 minutes then with water. I used a spray nozzle on the end of my hose. but make sure your water pressure is not to high you might bend the fins. also, when you have the hose in your vehicle becareful not to spray the inside of your vehicle. the ac evap has a drain so when you spray with water it'll drain underneath the truck. after my first water spray it was still kind of dirty so i did it again.



This was my second attempt spray. I got most of it.



and finally this is as clean as I can get it. But my ac works about 20 degrees colder. i used to keep it on high just to get enough air to cool me down but now i can adjust to low and my mada is cold.



Before you attempt to clean your ac. take a picture of the evap since its hard to see. get a small camera and angle it just like i did and see if its dirty. most likely it'll be pretty dirty causing your ac to be clogged like mine.
this took me about an hour to complete. not including the 30 minutes after to run the fan to blow the evaporator clean. the spray cleaner says you dont have to spray it down with water but it is recommended. if you dont choose to flush the evap down with water make sure you blow the evap for 30 minutes so the cleaner can dissolve.

also, try this on your own risk. dont blame me if you break something. blame yourself if not pay someone to this for you.

if you dont know how the ac evap really works. i'll give you a small lesson. refrigerant moves through the evaportor and since its made of metal i think aluminum i forget. it will stay cold as you blow your hot air from the car through the evap fins and it'll come out the other side cold.

if you need anymore information pm me or reply to this forum. i get on this forum every once and a while. have fun. you might get frustrated when doing this project. but, just relax and remember its worth all your effort. my evap got dirt because at one point I didnt have a cabin microfilter in. And thats how I bought the truck

Last edited by gt-leo; 07-06-2011 at 09:55 PM.
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post #2 of 39 (permalink) Old 07-06-2011, 01:24 AM
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Excellent post gt-Leo! My ac is not bad in terms of efficiency but it gets a little smelly when I cycle it on and off. Will definitely be doing this soon...


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post #3 of 39 (permalink) Old 07-06-2011, 01:34 AM Thread Starter
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Smell culprit

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Originally Posted by drewcs View Post
Excellent post gt-Leo! My ac is not bad in terms of efficiency but it gets a little smelly when I cycle it on and off. Will definitely be doing this soon...
If you have a smell from your vents. This is the main culprit. This is just dust and dirt and when it gets moist it stinks. Some people where doing the lysol trick. But all that does is cover up the smell. When the lysol goes away the smell returns. Clean it the right way. It should last you about 2 years before you have to clean it again. But a 10 dollar fix is better than a dealer or ac shop with 500 - 1000 dollar fix. It'll last the same amount of time.
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post #4 of 39 (permalink) Old 07-06-2011, 11:22 AM
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Excellent write-up with pictures. I learned something new today!
Thank you gt-leo!
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post #5 of 39 (permalink) Old 07-06-2011, 12:09 PM
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How many miles does your mada have on it for it to get that gunked up?
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post #6 of 39 (permalink) Old 07-06-2011, 12:58 PM
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Im totally gonna try this! I have an '09 with 28,000 but i live in the desert and its really dusty here and always windy! Thanks for the info!!

Bob

2009 SE...sitting on 24's
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post #7 of 39 (permalink) Old 07-06-2011, 02:06 PM Thread Starter
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04

i have an 2004 armada SE 4x4. I only have 82K miles on it. Not much but you got to realize how much you use the a/c and heater on the car. Every time I drive that car either the a/c or heater is on. So over the life time of my car we are blowing crappy air through the a/c. Also, Like I said before I just cleaned this thing about 14 months ago. Take at look at yours and you'll be amazed how dirty it is. If you've ever seen a split type a/c. Shine a flash light through the fan blades and you will see how dirty it is. Even though the filter is cleaned often dust and dirt still get through.
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post #8 of 39 (permalink) Old 07-06-2011, 02:36 PM
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Excellent post! This is def on my to do list for the weekend

Giggity
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post #9 of 39 (permalink) Old 07-06-2011, 04:00 PM
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Does those coils supply the cold air to the rear vents as well? The front of my car gets really cold but the rear is just.
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post #10 of 39 (permalink) Old 07-06-2011, 04:42 PM
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Booooyah! NICE POST!



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