HVACR 3 Position Service Valve, King Valve: Front-Seat, Mid-Seat, Back-Seat

In This HVAC Training Video, I show the 3 Position Service Valve Positions: Front-Seat Mid-Seat, and Back-Seat. I discuss the differences between the Refrigeration King Valve and the Three-Position Service Valve used for Air Conditioning. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety. Make sure that you EPA 608 certified before handling refrigerants!
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Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
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Other tool links can be found in the video description section.

[spongeblob]

New into the field and had to study this for my midterm exam. Kept confusing front with back, appreciate you showing the actual service valve itself and explaining how it works.

[jonathanjuarez]

Thank you so much I've been on the roof all day trying to figure this out!!!

[RayRay-nbtn]

I have been away for awhile but back watching videos. Glad that you have your channel still. As always a great learning experience for everyone and explanation of items. HVAC ON!!!

[bobrebera]

great explanation, just ran across one of the valves

[zesty]

Okay.. yeah so I was looking at my Carrier unit for the first time and was so confused why there were no shraders and I wasn't getting any pressure on my gauges.. thanks.

[bobsanders]

Can the king valve caps for this unit still ne purchased

[prabalmitra]

Just wondering if it wouldn't have been a good idea to insert a diagram of these valves on the upper left corner along with your explanation.

[silverrambo]

How can I know if I have 2 position or 4 position king valve ? How to recognize them ?

[fromanabe]

I think the service valves on my 40-year-old Friedrich compressor are three-position but I'm not certain. Both valves have a square stem on top covered by a black plastic cap. The access ports are just above the vapor and/or liquid lines and have no Schrader core. They have a small threaded metal cap. Any comments?

[Jiggywithfacts]

Hello Craig. I have a r404a small type appliance a slushy machine to be specific. I need to recharge it. How do. I charge it. How much psig and oz should I fill it up to. There is no reading on the compressor or on the side of the machine. Thanks in advance. Should I charge it thru liquid line ?

[tylerfabish]

the first valve is just a 3 position suction valve, the second valve is a king valve, mounted on the receiver (liquid line)

[DanO]

I just purchased your paperback book, I was just wondering if you have a lot of troubleshooting topics in your book

[mikecastro]

This video was very informative. So i have a question, Is there a position that the HVAC service valve can be where the heater would work but not the AC? I am having this problem right now. During the winter, the heater was working fine but now that its starting to get hot, the AC is blowing hot hair, but the heater is still working. The cooling setting blows hot air even when its not very hot outside. BTW i had my old co-worker work on my AC last winter, (who is HVAC certified) and refilled my freon. He also had told me that the king valve leaks if its in a certain position. So the position that he set it at doesnt leak, but now is when im noticing that the AC doesnt blow cold air. Your help is very much appreciated. thanks!

[wickedjiry]

I been having trouble closing king valves at my job is there a way to do it on a actual system for a better understanding

[funforlife]

Sir hmra ek 1.5 Ton ka MITSUBISHI k ac hi jab MI start krraha hi to 5 mint compressor chal rha hi phr compressor bnd hojaraha hi Magar fan continue chl rha hi kyaaaa masla hoskta hi

[publicmail]

Still like metal gasketed caps, what PSI are the good ones rated at?

[wasimedoo]

Very good information my friend God bless keep it up

[kckc]

How do you tell whether a valve is a 2 position or 3 position service valve when looking at a unit?

[acrepairnearme]

Cooool. Great Expectations. Very informative, More About refrigeration equipment stuff )