THE UNIT WAS OUT OF GAS, OR SO I THOUGHT....

Boy this one threw me off a bit, I was called on the office ac not working and I thought it was out of gas......

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00:00 SPONSOR CARD
00:31 SCHEMATIC EXPLANATION
06:06 WTF MOMENT
11:27 WE ARE BACK
14:39 INTERESTING PREDICAMENT
22:25 PRESSURE TEST
27:11 METERING DEVICE EXPLANATION
28:50 CLOSING WORDS

[andrewmartinez]

R-22 is such a good refrigerant they made the jug green to represent money

[stormeagle]

I just wanted to say, it's extremly nice that you share your screw-ups too and let everybody learn from.
When I'm working on such things, I get very suspicious if I'm doing a measurement and I get "nothing" as a result. Even on electric circuits, getting a wrong voltage feels better than getting exactly 0V, because it tells you at least that your measurement is working (and you have to check the function of your meter anyway). On refrigeration circuits I feel good when I'm reading a little bit above "nothing", maybe 2..3psi. If I'm reading zero, I start to do something like pressing Schraders to confirm this, because it makes me dubious about my measurement.

[saubervonHerzen]

"What we have is a legend right here...."..yes we exactly how I feel every time I watch one of your

[stevemcknelly]

Man, you scienced the hell out of that Nitrogen. I like it! :)

[alskee]

If I think a unit is out of gas I'll depress the Schrader before putting gauges on it, if it squirts gauges go on. Keep up the good work, awesome videos as always.

[Briantheitguy]

I would have felt guilty about putting nitrogen in the system, and would have paid for replacement if needed, also, I've never seen anyone purge nitrogen like that before, nice job!

[smarthome]

I am glad to see I am not the only one who starts with voltages checks. Enjoyed watching this.

One time my boss went with me on a residential service call and after the gauges were on and I checked the super heat he asked for my diagnosis. I said a coil is blocked. He went into the attic only to find that coil was super clean. He said that the unit needed refrigerant. I disagreed and he asked why. I said A coil is blocked, I never sail the evaporator coil was. I asked him to move three feet to his left and look behind the condenser coil. There was a clothes dryer vent directly behind the unit and we found the back of the condenser coil was completely blocked with lint. I am unsure if this was a test or if he had tried to fix this before me and failed. Once we cleared all of the lint, the system worked perfectly.

Q&A for yall: what is the largest copper line any of you have brazed? For me it was 1 5/8" & not fun as it was also my first forearm burn, the size of an egg.

[sterlingarcher]

Old school techs, before all the regulations hit, they used to vent non condensables the way you did .
As far as the billing and all that, in all honesty if it was me I would kick myself for not checking that the schrader was correctly depressed, like taking my gauges off and depressing the core with a screwdriver or something .
I got fooled by a core not depressing before and now I'm very careful and apprehensive with trusting schraders .
That being said we usually have to learn these things the hard way innit .

[chriscermak]

That first couple minutes of you telling the sequence of operations was awesome!!

[mtucker]

I’ve been here and done this! I personally, would have sold them new refrigerant because I don’t trust myself venting out the nitrogen properly. And you never know what kind of contaminants are mixed in with the refrigerant.
I do like how you look out for your customers to try to save them money, as long as it doesn’t affect the system. And I love the new way of you doing your videos. I know it’s more work, but it is a much better way of explaining your thought process and what is happening. Keep up the great work!

[ronhaefner]

I noticed the rapid rise right away. Look. Its so easy to armchair quarterback these things and your straight forward reflection is commendable. I have made this same mistake. Especially in the old days (1970 s...did I just date myself?) Had a system that wouldn't take gas. Bugged me for a while till the realization set in. GREAT video. I would apprentice under you in a heartbeat!

[mikecastillo]

People can give there opinions but it’s different when you are in the moment and working. Nice to see you think your way through that. Like you said I wish you would’ve kept the camera rolling through the frustration. Would of made me feel better when I do it 😂

[idontneedaname]

I love how you braze. Bigger the gob the better the job!

[manschool]

Thank you for the first 5 minutes of explaining the sequence of operation with the wiring. My field supervisor just did the same thing on the phone with me on Friday to diagnose a blown transformer that I possible grounded out during routing visual inspection/filter change on Thursday. It was on the exact same WeatherMaster unit. I'm new to HVACR and find all your videos to be so informative. Thanks Chris!

[sidecar]

Read a few of the posts. I agreed with just putting virgin R22 in, just to avoid any other issues for this unit. If I had no pressure on either gauge, I would have reseated my blue tooth gauges and checked by depressing schrader core with screw driver tip. We are under the gun most of the time and try to make good decisions and do our best. We don’t have to worry about 100* temps here (Wisconsin). I like watching these to see what tools other techs are using and picking up different techniques other tech have. Thanks keep it going. I’ll invite you to a roof here when it’s -20* for a no heat call.

[HumanRightsRevolutin]

Your best teaching video so far Chris thank you so much. We all love you brother

[reynaldoschorizo]

every single video i watch i learn something new. I always check schrader pin because when I first started, I thought a system was flat because I was getting no pressure, and I quoted for a league search. Turned out that the system was good, and my low loss fittings on my hoses were garbage. also, splitting the coil is something i have only done once. I will definitely be looking closer at the 4ton an higher units for split coils.

[jlurenzjr]

This one was great. This reminds us to not assume the simple basic things are ok like a schrader valve. This shows anything is possible because both valves were bad. This would of messed me up too. Great teaching video. Thank you!

[jaysonhines]

I watched this video at just the right time. Thanks for the tip on the Sumner 2124 lift. Never would have thought of using it like that outside of a building. (13:37)

[jericosha]

I don't do commercial, so these step by step walkthroughs are AWESOME. Thanks man!