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A/C condenser Cleaner

Smoky14

Member
Joined
Mar 13, 2013
Messages
22
Location
Southern NM
I'd like your opinions on the best cleaner to use for a little PM on my condenser. I'm not overly concerned about handling caustic substances, only what harm they cause to my A/C system.
Thanks for your imputs
Smoky
 
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Rockhead261

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Aug 28, 2013
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1,911
Location
10509
Plain water unless impacted or greasy, in which case NOTHING beats Dawn and a paint brush.
 

brewchief

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Joined
Sep 20, 2008
Messages
2,370
Location
Michigan
Water, from a garden hose not a power washer.

99% of dirty condenser coils will clean up good with just water.

Sent from my SM-G900V using Tapatalk
 

monkeyspanners

Well-known member
Joined
May 28, 2013
Messages
419
Location
Oxford, UK
Another vote for plain water. If you need to use chemicals, avoid ones that foam up etc, the foaming is the ali fins being eaten away, and really rinse well.
 

rkevins

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Joined
Aug 6, 2011
Messages
949
Location
Central Arkansas
it depends, on some Carrier condensing units coil cleaners will eat them up and cause leaks on them only water. I like Black Max it is a good foaming coil cleaner.
 

Falcon67

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Joined
Jun 11, 2009
Messages
18,371
Location
Merkel, TX
I used to borrow some stuff from work - acid, gnarly stuff, mask and gloves only. With the new system, I'll pay for that maintenance.
 
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Rockhead261

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Joined
Aug 28, 2013
Messages
1,911
Location
10509
Never heard of Dawn dish soap and a paint brush. Gonna have to try that one out. I had always been using SimpleGreen on greasy cotton filled condensers.
Rinse the coil with water, then make a water/Dawn solution in a bucket. You don't need much... I usually use a 4-5 second squirt of soap and maybe a gallon of water. Work it on/into the coil with a wide nylon house painting brush... stiff enough to work but it won't hurt the coil. Let it sit a bit and rinse with lots of water before restarting. I always warn the customer they might see some foam next time it rains. [emoji1]
 

miketyler

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Joined
Sep 10, 2009
Messages
635
Location
Cedar Hill, TX
Went thru this the other day on my evaporator in my mini split cassette. Some Simple Green, water hose and a soft bristle brush, carefully applied did an amazing job. Also blew dry with air compressor blown from the inside out.

Of course this is the evaporator and not condenser but still would work and more important doesn't leave any dirt attracting residue or acidic film.
 

bonneyman

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Joined
Apr 22, 2010
Messages
8,789
Location
Desert SW
If it's a newer Microchannel coil, the manufacturer states only water should be used to clean it. Any cleaner of any kind will attack the coil (they say) and will void the warranty. Many manufacturers have gone to using MC as a way to meet the 14 SEER mandate. Not all makes, but alot. Check yours. the coil will look very much like a car radiator.

Here's a sticker prominently displayed on one of my customers units. Warehouse manager told me in no uncertain terms NO cleaner could be used. Until a cleaner comes out that's been manufacturer approved for Microchannel use I'd use water alone.
 
Last edited:

Basskiller

Well-known member
Joined
Feb 7, 2009
Messages
489
Location
s cal
Simple green diluted 3:1. Let it sit for 5 minutes and rinse with water. We use this for indoor and outdoor condensers.
 

LS6 Tommy

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Joined
Dec 27, 2013
Messages
26,162
Location
Northern NJ
In the old days Clean Shine was "Da Bomb"... Mix with water, spray it on, foamed up like crazy, rinsed it off. Done. Aluminum looked brand new. Can't get it anymore. Probably a good thing in reality. It was VERY alkaline. You could easily ruin a coil if you were dumb enough to use it undiluted. I used to use it to clean Muncie trans cases...

Tommy
 
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