Leak Saver Direct Inject UV - Refrigerant Leak Sealer with Added UV Dye to Detect Large Leaks - for AC, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants - 6 Packs

Last Summer I got a call from my Mom saying her AC was not working. Sent out a AC repairman and he said she was about empty of R22. Had it filled back up but did not think it would last long. The AC tech stated that the refrigerant was more likely to run out during the Winter.I bought the leak sealer in late Fall. I checked the R22 level and it was low normal. I shot the sealer in and let the AC run an hour or so. Went back up the other day, with a couple of pounds of R22. Figured I would have to put some in. To my surprise it was exactly where it was last Fall. Now I think Mom had a very small leak but, for now, it seems to be working fine.

Two years ago my 19 year old Lennox a/c would not turn on. Service technician had to add 6+ lbs of r410a refrigerant. We discussed getting a new system. Two months later it was not cooling as well and required another 3 lbs. $1,300 for service calls but I got through the summer.Over the winter my furnace died so a few months later I was not ready to spend another 10k for new a/c system.As a DIY guy I educated myself with YouTube videos.I bought this sealer and charged the system myself.Had a very respectable 20 degree delta T which it maintained all summer.This spring we had a couple of 80 degree days with really cool nights so a/c wasn’t needed but I decided to check the system. Hoped for the best but expected to be disappointed.I hooked up my gauges and was pleasantly surprised to find everything was good.I am very pleased and impressed.Thank you for keeping me cool and buying me some time.

You have to be handy to use this, and it is difficult to get it to inject into your system, but a week out from using it we appear to be holding temperature. Since our only other option was replacing a $10,000 sub zero fridge from 1997 this seemed like a good “Hail Mary”. I recommend that you only use it in cases where the only other option is to throw the appliance away however. The better approach is to properly fix the leak. For us it just wasn’t worth pouring a big sum into a 25 year old appliance.

After reading reviews I thought I’d give it a try. HVAC guys said system was shot. Not bad for 26 years of use though. Followed directions and left system run for over an hour after injection and refilling. Air coming out of vents read 58 degrees. Later it read 65 degrees and next day was 72. Couldn’t find leak with uv light but didn’t have full access to everything. It was worth the try. It just didn’t work for me.

I tried this on two mini splits that had slow leaks before I found Nylog. The first seems okay.The second one must have had bad product. It was a 2 year old system that was a little low. I shot in this leak saver and it was very slow going in and made a farting sound. Much different than the first one I used. The gas was very slow going in. Unit ran for about a half hour and the compressor started making a loud banging sound every few minutes. The sound kept getting worse. By the next morning it was making a grinding sound and was working poorly. I know when you disconnect service hoses you will get some splash as found on the first unit with UV. The second unit that had the problem showed small bits of solid yellow under UV. Not splash. I disassembled the system and shined UV in the lines. I got NO UV indication in the lines. That means the Dye/ leak saver must have been solid upon install. If it was liquid it should have been distributed through the whole system after a few hours running.The unit is trashed and I had to buy a replacement so now I am out the 30 bucks spent on this product, 600 for a new unit and some expensive R410A. Plus labor and parts to fix the wall. I figure good luck getting anything back from leak saver and am not going to waste my time.STAY AWAY FROM THIS PRODUCT!!!!!

Becarefull of the shader valve they not line up fully, you might have to wiggle the tube

That it works great one applicationIs all it took and super easy to apply

I injected this into the heat pump and ran it a few days, but the refrigerant went empty. I pulled unit apart and found leak. It was pretty big. I ended up just brazing the whole shut. Sensor clamp rubbed a hole in the lineset. Everything good now. I have used these in the past, and they have worked. I do hvac for a living.