ComStar 90-299 Coil Safe Professional Grade Neutral pH Evaporator and Condenser Coil Cleaner, 1 quart Bottle, Green

Thank God I cleaned my outside a/c coils before the extreme hot weather hit; i can tell the difference!

Works as described, cleaned a 20 year old condenser just fine.

So far so good with those who say it is smelly well yes it’s a cleaner and you should be diluting it with water it says on the bottle 1 part solution up to 5 parts water. It has a windex smell. My coils were not filthy or gunky but it seems to have removed the odor that I was smelling. So in short it works and smells like a cleaner

Moved into a home with a terribly dirty condenser coil. The unit looked to have never been cleaned and had a very thick build up of dirt and animal hair all over. With some gentle pressure and this product, the unit looks and works good as new now. The fumes were acceptable for a product of this nature, but be careful not to breathe them in.

Used for standup AC! Coils could not be reached with a brush and had 4 years worth of dirt, couldn't even see through the dust.Mixed at a 5:1 ratio sprayed entire bottle. Decided to do a second bottle, SECOND BOTTLE WAS NOT NEEDED!I rinsed the coils with water do to all the foam to get water to run clear. When finished the coils looked like new with no scrubbing.One bottle will provide many cleaningsI will do this at the end of each season and one application will be plenty.Will buy again!

I had high hopes for this product after spraying it on my air conditioner fins I realized that the smell or should I say stink was absolutely awful & hung around in my house for 48 hours after application. I actually had a basket full of clothing on the other side of the room and I had to rewash it because the smell which is way worse than fabuloso was all over my clothes on the other side of the Room 25 feet away. whatever they use to sent this is not good and it wasn't good for my lungs and it raised my heart rate. I have had rustolium paint smell go away quicker than this. Terrible terrible terrible the last thing it seems to me is its safe. I'll go back to my old acid-based coil cleaner I had to leave the room for a couple hours but then at least the smell would go away this lingers forever whatever they use is terrible.

This certainly cleans but as others have said I will never clean an ac inside again. It took 3 days to air out the room and I’m still a little worried about the fumes.

I wanted a coil cleaner for my condensers outside that I could hook to a garden hose sprayer. I also wanted something that wouldn't foam (or at least minimally did so) since I've gotten canned coil cleaner (which cost more and only does one unit!) and they all foamed up before hitting the coils and I don't feel they got good penetration into the coils and just sat on the surface.It frothed up a little but no more than any light soapy solution. Had a typical all-purpose cleaner scent to it. I used it on two units that had light dirty on them, so I can't say how well it'd do for a more dirty unit, but I did see a bit of mud getting washed out of the coils.Could probably get at 4 or 5 units cleaned with one bottle. Next time I might go and put it in a garden sprayer to get a more even concentration.