HVAC 076 Pressure Switch Refrigerant 

Thank you for the video. I left 40 years ago. You brought a lot of good memories too much people but we loved it. Thanks.

Rookie field assistant in commercial refrigeration here. I changed careers at 36 years old This is legit educational material. I've come to find that whenever you drop a video I'm about to learn something. I really appreciate your effort to put this kind of stuff out here.

Excellent video great job, wish I saw this 6 months ago

Nice, great tutorial. I also prefer to use tubing wrenches whenever possible.

Very nice explained. Thanks for your videos. I’m looking forward for a HVAC/air handle electrical video

Thank you for this video. Love from Nigeria

I had a bad high pressure switch on my heat pump a couple months ago. It wasn't opening, but rather had a resistance that increased when it was running during the day. It would run and cool starting at sunset. Condenser doesn't get a lot of direct sun but does toward sunset. Got misdiagnosed as a bad defrost board by the tech as we both missed that the LED code on the schematic was for the comfort alert while the defrost board code was a tiny label on the opposite corner. The board LED code was for HP lock out. I thought it out, tested the HP switch and found the weird resistance issue. Jumped it out and checked the switch over several hours/days and it never opened when running. Instead it went from 9 ohms in the AM to 26 ohms with in minutes of startup and locked out. Called the HVAC company to recommend the fix was the HP switch and when a different tech came out he brought the board and HP switch, verified what I found and changed the switch. He never found any high pressure refrigerant condition.

Very knowledgeable Great job!

About the brazing on pressure switch all the way stuck inside I would normally cut about 3/4 vertically so I Dose not crates almost no restriction. The 3/4 cut will be inside the pipes all clean up of copper files. And the 1/4 extras will be my guide Deep.

So is this the only way to tell if it has a schrader, to call the manufacturer? 5 years into the trade, found two leaks on a head pressure switch this year. Able to remove the first and apply thread sealant. The other was a trane RTU and quickly found out it didn’t have a schrader… thankfully was able to mitigate things but obviously would like that avoid situations like that in the future.

Great info, Thanks!

Thank you Sir.

If your up tight about wrench type use an actual line wrench. Great vid tho, ThankYou!

I will check first pressure switch its easy with a multimeter and then find the cause

Can you tell me if a mirage 220v inverter life12 has a low pressure switch

Thank u for this,class on pressure switches.could u give us information on how to set them up on different pressures.

Thank you!

Thank you

Awesome video, thanks for sharing. Question: the measurement from copper stick, is it 1/4 on the pressure switch with the yellow wires? thanks.

How do you determine a HPS and LPS?

Perblam E2 model SERVICE FIRST Trance Rooftop SENO 1577 et Base pression open

Good video! One question: do the thermo type switches work as good as the pressure switches? Thanks

I wonder if you can elaborate on the tee (or provide a link). Tee female has a depressor and I assume that both males have a schrader valvle. I am finding a few but can't confirm 2 schraders.

Informative 👍

What is the name of your t port of pressure switch I am. Searching that but a dont know. The name. Plss help me than you

very good

Is that restricted could change the state of refrigerant from vapor to a liquid? Thanks Ty.

VERY GOOD INFO

which wire is the common, and which is the voltage wire

Why wouldn’t they all have Schrader valve core and be able to be replaced easily.

I really want to know how to correctly drill a hole into a new pipe for brazing in a pressure switch. Can you use a regular drill? Any videos showing such a procedure?

Bp=1bar and open

Do you have a video on the thread types encountered in HVAC work?

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Do you have a video on delay swiches ?

Another lesson learned. Thank you👍. Q- If you check the electrical state ( open/closed) of the pressure switch with the system off (equalized), is it safe to say that is what the “at rest” position is supposed to be in ??

Tt I can't find your videos for electrical

I know people hate them but would a bullet piercing valve work to put high pressure valve on in a sealed system?

manufactures who don't design their systems with pressure switches that screw onto schrader valves SUCK! plain and simple. i just spent $600 to have a low pressure switch replaced on my 2.5 year old amana ASX16042 ac unit. the tech installed a new nipple with a schrader valve. pisses me off that all AC manufactures don't install schrader valves.

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