Frost KingACF19 Foam Coil Cleaner, 1.18 Pound (Pack of 1), 19 Ounce

Great product if you use it in the right scenarios. If you have a little bit of build up on your outdoor condenser coil, this stuff is great. You literally just spray it and let it foam up and sit for a few minutes, then turn your AC back on and it sort of self-rinses as the coil condensates. It does a very, very nice job cleaning up a coil with some slight dirt, pollen, cottonwood, etc. build up. That said though, if your coil hasn't been cleaned in years and it's a complete mess, this isn't going to work as well as a good ole fashion manual cleaning with some pressurized water and solvent. So I guess what I'd say is don't expect a miracle. If your condenser is a total mess, have it cleaned professionally and/or do a more thorough manual cleaning. But if you use this like I do, once per year at the beginning of "AC Season" and the condenser coil hasn't had a chance to become filthy and you're only doing a nice little general cleanup then this stuff does a nice job and it's super easy to use. Long story short, it's not going to bring an unmaintained 20 year old unit back from the dead, but it will absolutely give you a nice little preventative maintenance style cleanup at the start of cooling season.

The media could not be loaded. Worked great for cleaning the compressor and evaporator coils. We moved into a house where maintenance was not high on the previous owner's priority list. The 15 year old A/C was running non-stop, the evaporator coil was freezing over, and sweating everywhere and it wasn't cooling.The upstream side of the evaporator coil was covered in dust and pet hair. I used the compressor and some air to blow the majority of that out from the downstream side, then thoroughly coated both sides of the coil, let it sit, then reapplied to the dirtier sections. It was evident the grime was dissolving and starting to run into the drip pan. I like the self-rinsing aspect. More about that later. Also a good time to make sure the drain line is cleared.Now for the compressor coil. I rolled up my sleeves and dove in I disconnected power to the compressor unit, removed the fan and coil shroud, liberally sprayed the entire coil and let it sit, per the instructions, then I used the hose on a gentle spray from the inside (avoiding electrical components). Put it all back together, with those frustratingly small sheet metal screws, and turned the power back on.I was expecting the residue on the evaporator coil to send a smell through the entire house, so we initially opened a bunch of windows and doors, before turning the air back on. The citrus smell was apparent, but not unpleasant.The airflow was much better, and as it rinsed itself from the coils, over the course of the next day, airflow improved even more.We saved a few hundred dollars on a tech cleaning our unit and we know it was done thoroughly. It may get us through another summer

Had an old window A/C unit that was taken care of very well. Instead of a new A/C one I figured I give it a try to clean the old one. I left the unit in place in the window ( I'm 70 ) and did not want to try to remove the heavy old one. It took only a few minutes to spray on and I did it twice to insure the coils were clean. Now the unit runs almost as good when it was new. Worth it to try before you spend a ton of money on a new one when your old one was just dirty.

This stuff actually works. I have a large in the wall air conditioner. It constantly smelled like mold whenever I turn it on. I was at a loss on how to get rid of the smell until I came across this. I took off the cover of the unit and the filter. I covered the wall under the unit with a towel so the foam didn’t drip down. I sprayed the entire metal part (not sure the name of it). It instantly started pulling dirt out of the unit. I was shocked. I wiped it down completely after it was finished foaming and proceeded to do it 2 more times. After I wiped it for the last time I put the unit back together and turned it on. There was no smell of mold. It was actually a clean scent. I did this over a month ago and haven’t had to do it again. I use the AC quite often and haven’t smelled that mold smell. I’m pleasantly surprised.

This Frost King ACF19 Foam Coil Cleaner got put to the test on a 3.5-ton AC condenser that looked like it hadn't been cleaned since flip phones were a thing. About 1.75 cans later, a shocking amount of dirt came pouring out—kind of like giving the unit a spa day after years in the desert.The cleaner foamed up nicely and clung where it needed to. One neat trick: instead of fully removing the condenser lid, just propped it up with an upside-down shop broom—worked like a charm and saved some hassle. The spray itself isn’t exactly cheap, but the can packs a solid amount of product, enough to really get the job done.Power usage is being monitored—recorded kWh usage the day before and the day after cleaning, with temperatures staying in the sweltering AZ 75–108°F range both days. If the theory holds, there should be a nice little dip in energy consumption thanks to cleaner coils doing less work.

Works well - instructions were clear on how to use. Definitely got very foamy - so start with a little small spray at first and allow it to expand before applying more.Very easy to use - the hardest part was taking apart my de-humidifier to expose the coils where the buildup was. The cleaner spray was great at getting into all the nooks & crannies of the coils, and unblocked the dehumidifier, so it no longer leaks condensation. This is extending the life of my dehumidifier - would absolutely buy again (although the bottle is large and plenty of quantity, I don't foresee needing to buy this again for years).

The Frost King cleaner did a great job with our air conditioning unit. The foam got deep into the coils to remove all the dirt and debris. With a quick wash, the foam came off and the air conditioner looks like new.

Good Product