NO GOOD DEED GOES UNPUNISHED 

That’s all part of big picture diagnosis!

it is funny but it worked out in their favor of alerting them about possible acid contamination

Gotta do what you gotta do

I do sample test too with a balloon

So many people have the mentality of no pm if it appears to run/ work its fine. Gone is the trust and understanding that maintenance will save money, because it's all about short term "savings".

Well said.

Don't be shortsighted, you need to understand their perspective. They have a business to run, people to pay, payments to make, and the last thing that they can possibly think about is their HVAC system. To them, it is a expense that has to be recovered through business. Sometimes there is not the business there to cover that expense at the moment, so they are forced to do the minimum on some things. HVAC is so out of sight, out of mind for most people, it's a natural place to be forced to cut back on. Also - the HVAC community has somewhat of a reputation for having bad actors, so the guard is up on being taken advantage of. Just need to remember empathy and think of being in their shoes. They aren't stupid or inept usually, just priorities are different for many reasons. Coming to an understanding together on this through educating is the best way forward.

'we are trying to rip them off'...Yes because 99% of time techs do rip customers off. $400 for a capacitor swap out for example.

Hard to blame a business owner these days for being paranoid. For every honest tradesman (regardless of craft), there are at least ten that will lie to your face and rip you off.

does the foam need replacing?

Thanks bud

Most wifi routers also use 2.4GHz. So if there's a lot of wifi connections in his area, he might simply be out of usable channels. Although, I think wifi and Bluetooth run on slightly different segments of the 2.4GHz band, so they might not interfere with each other. Personally, I would download a wifi analyzer app and a Bluetooth analyzer app, both should be free (they were for me), and that'll tell you mostly where the issue lies. It won't expose fresnel zone interference though

I disagree...it definitely costs however good pms and troubleshooting limits the costs.

Good point, I will discuss this on my livestream this evening 7/31/23 on RU-vid @5:PM (pacific) come on over and check it out ru-vid.comqEza1nnkhpA

It seems to me that problem of this plant is overload with refrigerant

he said he recently replaced the condenser motor,maybe HPS adjusted too high above relief pressure.

@@MariosACandRefrigeration First that would make atactivating when actually cooling down, when it gets rather high pressure (for the intake) gas from the evaporator and not at pump down, when all pressures become lower. And second, the traces within the compressor (the damage of the seal of the pipe redirecting the released gas onto the thermal switch) had shown it was the snap disc what activated. And this is responding to head temperature and not pressure. The too high head pressure and related overload causes mainly the motor winding to overheat (high mechanical loading, so high current draw), not that much the discharge gas chamber (high pressures do not need that much of a compression ratio to become really high). But here the winding had no sigh of heat damage (according to me), but the discharge gas path was clearly scorching hot. This tells me, there was not much pressure to load the motor (so not that much of pressure difference), but very high compression ratio making the adiabatic compression to reach very high temperatures. And low difference can have high ratio only when starting at low pressure (nearing vacuum if taking to an extreme). So it goes back to the faulty low pressure switch (which job is essentially to stay away from the high compression ratio operation n the first place)

@@annaplojharova1400are you a compressor expert? Also what is a rotor lock compressor?

@@LC-qi5ff Not "compressor expert", just taking the basic gas thermodynamics (what the temperature does when compressed), mechanics (pressures affecting motor loading) and way the motors work (high load causing high current, high current causing more heat created within the winding) and trying to put it together what is happening with it under those discussed fault scenarios. And the engineering general principle of cost reduction that every detail is cost optimized so much it has about the same margin to fail over the designed lifetime, so if one thing fails/deteriorates faster than other (clear heat damage on the compressor head vs not that much on the winding) tells what part has been overloaded (almost every such damage sequence too high temperature stress as the direct cause of destroying anything, be it oil losing lubrication ability, leaky seals of something not moving, winding insulation discoloration and failure, metal weakening and breakage,...)

I'm a weekend warrior too, but here are my guesses: bypass: An internal valve that relieves pressure from one side to the other, supposed to prevent the compressor or tubing from exploding pump down: when the magnetic solenoid downstairs is closed by stopping power to it by the temperature control, the compressor continues until the low pressure cutout stops the compressor. When the temp control reaches its high limit, then the solenoid gets power again to open, which untrips the low pressure control and the compressor starts again thermal: an internal thermal safety switch that if it reaches a certain temperature, it stops the compressor, to prevent meltdown i assume

Fyi: Pump down means you are pumping the refrigerant down in a certain point in the system ( normally the receiver) for a repair OR the unit is " pumping down" when satisfied on temperature or for a defrost in " standard" operation. An electro valve shuts down between the receiver and the evaporator inside. When de-energized, the valve shuts off and the refrigerant won't pass through... So the compressor will " pump down" the refrigerant . Compressor bypassing : higher pressure discharge going back to the lower suction side. Mainly the " valves / valves plates " are defective in simple words. When a piston is going up, you are compressing the gaz to push it through the discharge valve and when the piston goes back down , the gaz in the cylinder chamber becomes lower than the discharge pressure so the valve closes back. If it doesn't shuts off properly your high pressure will go back into your lower pressure. " Bypassing" Thermal overload: depending on the type of thermal OL( overload) is basically an internal safety ( in this case) that will OPEN the the windings of the compressor as a safety if the compressor runs too high on temperature/ overamping etc.. Why he cooled it off with cold water to make the process faster. My english isn't perfect but i hoped it help a bit

Thanks so much !!!

Just did a head gasket on a late 90s bitzer a few months ago, those things are built like tanks

Trane open drive....from the 1970's....we service a building with an old 1950's Carrier 19C with vacuum tubes.

I will discuss this on my livestream this evening 7/31/23 on RU-vid @5:PM (pacific) come on over and check it out ru-vid.comqEza1nnkhpA

they tend to loosen or crack with age. vibration kills them, especially with switches and wiring or the long cap tubes going to controls, you'll often find the tubing dancing with harmonics and vibration. that puts load on the tee and work hardens/stress fractures. pretty much they're best for temporary use or somewhere not connected to a compressor directly, say on receiver tank, other taps.

I'm in East Tennessee and we had a heat index of 120 the other day and everything seems normal. I don't think the heat index applies to HVAC quite the same as a sweating human..

​@Bryan-Hensley you are correct...it is for human comfort or lack there of, but it still doesn't change the fact the temps are way over design and its causing lots of issues....especially with DOAS units...they are tripping left and right

@@jasonjohnsonHVAC that doesn't seem to happen around here nearly as much as southern California even though our heat index is the same many times. However (even though it's not happened in 10 years) when we go over 100, the systems do the same as there. When I started this business in 2001 it used to get above 100 at least a few days per year, but for the past 10 years or so it barely tops 90. Our nights used to stay above 70 for weeks, now it rarely hits 70. It's actually hurting my business some. I don't have those overwhelming rush periods anymore. Dang global warming..

@@Bryan-Hensley we are only getting to 95-98° at 9-10 at night and its getting only down to the high 80's at night...no rest for the wicked....on Friday i worked from 7:30 am till 2:30 Saturday morning....im ready for a break already.

Different setup...the systems are always designed for local conditions...so any system in Phoenix will be speced for the higher ambient temps found there...

I will discuss this on my livestream this evening 7/31/23 on RU-vid @5:PM (pacific) come on over and check it out ru-vid.comqEza1nnkhpA

I use the staysilv brazing flux

Same, the hissing was definitely audible.

Because when refrigerant changes from high to low it hisses, it is the same thing happening in a reversing valve

Probably about 2 years now

Just valve off the tru blue at the core removers, than attach the gauges and vacuum those down than the vacuum isn't broken

1.) Why are you in the industry but don't understand how to clean the coils? 2.)use a roll filter over the coil that has very very little air flow restriction that can be removed after the season. Think like fiber glass medium filters 3.) PM's need to be design to match the manufacture recommended service. Keep in mind most refrigeration system run on critical refrigerant charges and as such can be low on refrigerant from a single attempt to collect SH or SC temperature via pressure, as such many refrigerant manufactures have guides on diagnostic designed to quickly test the system from a start up procedure that prevents accessing the refrigerant pressures. It sounds to me like what you need is to take manufacture training on specific pieces of equipment. Don't take that as condescending. If you want to learn refrigeration you need to be trained by refrigerant producers because "professional HVAC" employees tend to run on rules of thumbs which is a great way to manually destroy a refrigeration system.

@@CallegriaofSoulbound I'm a maintenance tech that is trying to learn refrigeration systems. I'm in my 2nd semester of HVAC schooling by going to night school that only offers one class a semester that I'm paying out of my pocket.

@@wisconsinbush2940 that explains alot. If your school doesn't teach you how to clean coils you need to get a refund. You should have to know that unfortunately you might only get trained on what you need to know to get the EPA license. But the information I said after that still stands, the best place to learn refrigeration BECAUSE it is not same system to system is from the manufacture. Hopefully you will find a company that pays to send you to training with manufactures. PM's on Air Conditioning system are very basic but refrigerant systems are a different ball game, same field different rules. Learning systems and process ARE important but understanding WHY is the first step and then learning the equipment and all the different forms and tools makes a huge difference. You got some time ahead of you that's why 5 years is a very reasonable expectation to experience in the HVAC field and refrigeration takes a little bit more.

the liquid line solenoid is shut as there's no call for the unit to run until he powers the unit back on and there's a call for a cool.

@@Justinstratton11 thanks for the feedback but the weirdest thing is with this nugget ice machine that has a constant ice production : HOSHI FS-1022MLH-C serial: F00076B. There isn’t a solenoid valve. I checked the unit itself, the attic where the line set runs and the condensing unit. I even verified with hoshi tech support

@@timothydelgado4907 you have a pump down solenoid valve in that unit which is why it your low side stayed in a vacuum just like in this video. Google that part number and find the wiring diagram. A pump down solenoid valve is the same as a liquid line solenoid valve.

Full sight glass mate

That's what he did?

@@Bryan-Hensley I was referring to installing a different brand of compressor that may have been available locally rather than waiting to order that one

It is compressor pressure. When the valve is front seated the ports are isolated from system. You can tell by the position of the port in relation to the line. You can front seat the suction and pump down then front seat the discharge and you will have just a little pressure. All this is true only if the valves are capable of sealing off.

@@topher8634 Ok, so I'm not sure why he's telling otherwise then in the video? Maybe he was mistaken? Or am I just hearing it wrong what he's saying?

@@RSBot2jar no you heard right I was thinking the same when he said it. He's just mistaken. Or maybe he had a bad experience with a rotolock that wouldn't seal off and now just assumes it not isolated from the system.

450

They are called knipex

Also they aren't insulated

@@Joshuatimmons1783 Thank you for your help.

@@rat_boy_u Thank you my friend, I appreciate. Would you happen to know if they are soft jaws?

@@stevenhorne5089 they make slip on jaw boots for them

Use Schrader cores and depressors.

@@RodrigoRamirez-fc5hv Chris mentioned in the video that the pressure sensors won't accept them so they can't be used there...

I think R404

IIRC, it's Du Pont.

I still use mine daily... I've never noticed a pressure problem though.... do you have low water pressure to start with?

Most foam guns are supposed to have no pressure behind them. they only should mix the cleaner and water in the right ratio and foam up the liquid to go on and somewhat stay on more or less 'vertical' surfaces. just the liquid would immediately flow of, foam sticks on some more. The only reason why foaming cleaners are used is the changed viscosity and clinging to stuff. For the cleaning effect a straight liquid would do the same, you just would not get it to stay on there. Also, it is quite hard to get pressure behind foamed up cleaner. It usually should be enough to wash them down and the cleaner should get into and through the fins on its own. The capilary effect should get cleaner everywhere.