Lennox package unit low on refrigerant
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- Опубликовано: 29 ноя 2019
- This video was filmed during the summer, however I just got around to editing and uploading it.
I return to a unit we had to service twice over the summer. We added refrigerant both times and attempted to find the leak. I am going to do a thorough leak check to try and find this mystery leak- where in the world could it be.
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I had the same type of a leak through the low pressure control and it was venting from the wires into the wire nut. We changed it out and I still have it in my van as a Trophy! I'm a believer!
🏆🏆🏆 #thatscool
I would love to catch one of those leaks
I dont mean to be so off topic but does anyone know of a tool to get back into an Instagram account..?
I stupidly lost my account password. I would appreciate any help you can offer me.
@Xavier Leandro Instablaster :)
@Joseph Walker thanks so much for your reply. I found the site thru google and I'm in the hacking process atm.
Seems to take a while so I will reply here later with my results.
Mystery leaks are the best. Lol. Good video
Thanks Rookie
You mentioned an internally leaking pressure control, leaking from the wires. I have seen that. It really blew my mind. In fact my boss missed it when he was in "I'll show you" mode. Neither one of us would have believed it if we didn't see for our selves. That particular job confounded all of us.
If it leaks again, lift up the cond. fan motor & shine a really bright flashlight on that microchannel on the inside & look for faint oil stain spots. That crap will drive you crazy with super micro leaks. But the oil stains are the dead giveaway that the leaks do exist 👍
Good tip Shannon, its been awhile since I had a good super micro leak
The dreaded Lennox mystery....
Defitinely a good video!
I have had a few that i went ahead and replaced the Schrader valve stems and low pressure switch,being that i did get hit and miss,well that being said,on one particular one i did both high and low pressure switches and stems..being low cost items, and have yet to go back to recharge...but my gut lennox evap.coil ...?? ( hairline crack at header(s), as you mentioned , more than likely.
Keep us posted..very interesting!
There is only so much we can do as contractors/ technicians.,especially when its a small leak..Defitinely a leak somewhere..
Appreciate your time and effort.as always! ( great tips and clip)
These type can rack your brain though!!
Bryan Tyler Refrigeration.
Thanks Joseph- it left me scratching my head since I was able to pull such nice tight vacuum as well- Just going to have to see what happens this coming summer
Two things.
Nº1: I know your hate it, I hate it and sure the most of the techs in this room hate it but: Some shoot o dye? as a last resort.
Nº2: I remember some of the high-techs here in his youtube channel filmed a couple of wires of a presure switch leaking... not sure if was Ulises Palacios, Eric Mele, Alex... didn't remember... but had a beautiful pair of wires leaking soooo good.
Cheers from Europe Bill. Love your channel.
Thanks Juan- If I remeber correctly I did check the wires and switches and didnt get a hit but I would love to find a leaking pressure switch one day, just because there so rare. Im going to see if they call us back out this summer, if so I may need to add dye-- if so I will film a follow up
Was already hitting the like button as you were asking for it in the video 😂 Thanks for the video man, definitely some great tips in there!
Thanks Joseph
Great job again like always
I agree on trying higher pressure, I had a York package unit with a micro channel coil .I did a leak check with nitrogen and 410a mixture at least 325 on pressure to find the leak on the bottom corner of condenser coil. Great video thanks for sharing.
Thanks for sharing Eric- I may have to do that, well see how it plays out this coming summer
You gave it your best shot. Sooner or later it'll really show up and you can nail it! A-PLUS!
your exactly right--
Lots of good information like the videos
Ac service tech had a good tip on checking for leaks at schrader cores. He drilled a hole in a plastic valve cap and put bubbles on the valve cap. I have been using that tip since I watched his video. Thought to pass it forward.
Peace
Ac service tech that is a great tip, Im going to use that myself- Thanks
Excellent! Love all your video's!.
Thanks Jimmy
Good video bud, i think you did all the right steps. If i was in this situation the following year that pressures were low, I would defiantly inject some dye. Sometimes with formicary corrosion it can really be hard to pinpoint on commercial units. p.s. thanks;)
Thanks for the feedback Joe- as a last resort I might have to add dye someday but Ill wait to see how this next summer goes
one of our priorities from the manufacturer a magic airhandler the capillary tubes are usually right against the blower motor housing and over time it made kinchs or small holes in the tubes. good for me able to find the leak right away but sucks for the resident tho. I hate these kinda leaks that are impossible to find. nice work
Thanks Chris
Someone is climbing up there and huffing the good stuff.
huffing the good stuff, lol
Lol
Instead of using bubbles on the ports use a drop of nylog. So if you need to put your gauges back on you won't chance getting moisture in the system.
I'm really enjoying your videos.
Great vid with your procedures
Thanks
Nothing more frustrating than having all of your tools there and doing the full evac and charging without being able to locate a leak
Exactly, so un gratifying
Eres el mejor!!! Gracias!!
Gracias Juan Y Gracias para ver mis videos y su comentario
awesome vid
Thanks
Dont forget to pop the cover and check the compressor terminals bakelite for leaks. Some leaks will only show up with thermal expansion - UV dye additives sometimes help with finding that type, just be sure it is compatible with that type of oil in system.
Probably another company stealing refrigerant from that unit
Here come the "why aren't you using a bluvac micron gauge" and "you can't pull a proper vacuum without 18" diameter hoses" guys. I hate these type of leaks. I've been known to jack the pressure up into the 400-500 psi range. If it blows.....it blows.
Hey Jacob- if I get another call this summer about that unit I may have to do something crazy like that, lol thanks for watching
Ty nice video
Thanks for watching
Did you change the filter Driers?
good video.Congratulations .'.
Thanks for watching
Nothing more frustrating than an inconclusive leak check in my books..
I still think about this one, I wonder if ill be called out again over the summer and find it low again-- hope not-- thanks for watching
Did it leak again?
I hate those mystery leaks. Came across a few of them.
There almost as hard to solve as intermittent issues
@@curioushvacguy6876 those situations are the most frustrating ones.
Nor cal Dave is an awesome technical 😁
you got that right- I watch all his videos
The nitrogen is added on top of the freon. I' wondering how the nitrogen and the feron can be separated.
Try to spray soapy water over the microchanel coils and maybe you can see the leak 👍
I should have soaked it in bubbles-
Ninety percent of the time the leak leaves an oil mark... the problem is that annoying 10% in which it will leave an oil stain after years of refilling and the machine makes us look useless and some once I thought I heard her laughing at me
How low were the system each time?
Hey Rick- If I remeber correctly, which I sometimes I dont, I think they where a pound ish low on the previous techs visits-- its in my notes attached to that customers account and since it was a few months ago that bit of info escapes me. I wonder if maybe my leak detector is or was having issues
My old GE H-10 will detect the tiny amount of gas which seeps out the valve of a halon fire extinguisher.
I need me an H10- Ive heard great things about them
Maybe the core was leaking under pressure, but under vacuum it wasn't? Just that little bit of movement?
Thats a good point, its possible
Leave your gage on over night and check it in the morning
Good tip Joe- Ill have to try that if they call us back in the summer
thank's partner for sharing! how do you like that sniffer?.
Hey Jimbola- Im satisfied with it so far, there have been two or three other occasions where I suspected a leak but it never went off-- which could be because there isnt really a leak, I know some customers who have preventative maintenance done and want there refrigerant levels checked everytime
Those are rookie words. ‘’ leaking cores’’
I got instant gratification.
Not in a creepy way I hope, lol
300 microns and no decay psh . If there is a leak you’re micron gauge isn’t calibrated no way you would achieve that on a leak. Idk how touchy that cps is but I always have the microns creep a little then settle on the bluvac gauges yours was just instant 0 rise.
I agree- maybe theres a refrigerant huffer in the area or they have a maintenance guy who likes attaching gauges everytime he visits
You may want to try ultrasonic leak detection.
Its worth a shot
Is that an FTIR leak detector?
Didn't know Sensata made pressure switches.
I believe it is- whats your go to leak detector? Ive been looking to upgrade
@@curioushvacguy6876 I'm no tech personally, just interested in the technology.
@@curioushvacguy6876 This person likes ultrasonic.No effect with wind. Also would work if you need to detect something like CO2. ruclips.net/video/3qgyqejXZIk/видео.html Using a smaller SRL8 or the Testo 316-3 works, and if they fail, the old and true H10, or the H10PM battery model.
#42 thumbs up
Thanks for watching Steve
So I had a York package unit. One circuit flat the other low on charge. Using an ultrasonic leak detector I found both leaks in less than 5 minutes. We had a safety meeting yesterday. One tech was having problems with pneumatic tubes leaking. Rats had eaten the tubes. I told him to use the ultrasonic. Everyone gave me sht about having one and some had never heard of it. Well this morning a tech was on a 260 ton chiller. He could not find the leak. He called me and asked me about my ultrasonic. I told him he could borrow it. We met at lunch and he got it. He just called me and said he had found a leak within 5 minutes and was searching for more. He’s going to order one today. The chiller is 134A my unit was 22. The ultrasonic leak detector does not care what refrigerant you are working on. If their is a leak it will find it. I have sniffers but I couldn’t tell you when they last had batteries in them. Best $500 dollars I ever spent.
Hey ACTech- what brand of ultrasonic do you have?
Amprobe.
Hey curious something I forgot to mention. On tube and fin coils the manufactures are rifling the tubes. They remove material for this process. It used to be if you had a leak it would be at the welded U bends. Now the potential is everywhere. I’ve found leaks other techs couldn’t find with sniffers. They were in the middle of the coil. You should try an ultrasonic. Anyway stay safe.
Wrong place to install micron gauge. Install on the system.
Why not dye n bye that way if its does leak again that'll be Easier to pinpoint thoughts!
GeneK Hvacr die is a contaminant. Oil and refrigerant are the only things that should go into a circuit.
I would consider it as a last resort but before that I would repeat everything I did there, maybe up the pressures a bit and isolate each component of the system
Remove the top off the unit.
Sucks nothing significant,
Hi
Hi there
you never said which circuit the leak was in and it looks like you're treating it all as 1 circuit, what gives?