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Great demonstration of showing how to check pressure switches and its operation. The biggest tip was that not all pressure switches have schrader valves which is a great safety tip for beginner techs to remember.

Every time i click one of your videos, its straight forward and very informative for a tech or who is trying to be one. You are a good teacher you should be one if you are not.

Nowadays only those high-price ACs have these switches, while the rest have almost zero! Yes, they want your AC to blow up ASAP! Part of planned obsolescence! Good job, EPA!

That's the best video I ever seen about low and high pressure switches!

Absolute amazing video 2nd yesr sparky who haven’t learnt much as of yet and this has just helped me out so much thank you

You’re the best Craig I really appreciate all what you’re doing and thanks a million for sharing your knowledge and pass it to the new generation

I know this is an old video, but Im just finishing school and the material you put out is fantastic. I have your book…right now Im just a goofy new guy..but your book is my goto source. Thanks again.

Late to the party because I'm on call this week and was pretty busy yesterday. It was interesting that you could hear an audible click when those pressure switches opened and closed, however you would never hear it with the compressor or the fan running. Good stuff Craig!

You do a great way at explaining things in thorough. Thank you sir

I find all this HVAC stuff to be awesome. Electricain here from Indiana, Pa

Great video for a beginner. I always enjoy watch and learning from your videos.

Thank you so much for posting these videos. It really ads to my diagnosing arsenal.

Thank you! New camera?) Video quality is much much better.

Thank you so much for this video. Never learned that much in training or working in the field. Having a trouble with a fairly new Trane heat pump. Something I have never heard of or seen before. The contactor had an intermittent problem which after two visits got to see first hand. Customer was complaining about a grinding noise (always a red flag) so I came and checked but found nothing wrong and pressures good. Only oddity was a fried lizard on top of the capacitor. The cap checked out OK. About 2 weeks later unit wasn't working. Cap still good but unit wouldn't work. Standing pressure was over 200psi. I pushed contactor in and ran fine. When I released it stuck just slightly as I moved my hand away. Didn't give that much thought and went to attic to check safeties there. All was fine. Back to HP. When I went back outside the unit came on. As I was watching the gauges the contactor started to spark and arc bouncing in and out making the grinding noise the customer had mentioned and was really scary! I pulled the disconnect and replaced the contactor but again the unit would not come on. I thought maybe compressor went out on thermal. Only thing I could find was the low voltage was being stopped by the high pressure or high temperature switch. Now I need to figure out which one and replace it. I am guessing it fried when the contactor arced but not sure. Watched this to see if I could learn more about these switches and how to test them. THANKS!

Thanks!

Got my universal in the mail today, thanks dawg. Your videos are very helpful for someone green like me.

I love this channel, thank you so much for taking time to make and post these videos!

Craig once again your give outstanding video instruction! Keep up the good job Cheers!!

This is a great demonstration. Love the little custom tool you brazed to show this. Demystified them for me =)

Always great learning channel. Yes I use Amazon to get some of tools on the list. Thank you.

This is very useful, I appreciate this tremendously.

Really appreciated your hardworking bro..it really help me to understanding the ptc better..thanx bro👍👍👍

Amazing video wow I’m speechless you are a great instructor thanks for sharing

do you guys have a video like this on transducers?

Excellent explanation.

Thanks so much for comprehensive demonstration. Helped me a lot.

Thank you man I learnt a lot from you video

Very very very great explanation.

Thank you, thank you.... you have taught me so much. God bless!!

So if my heat pump is not running and the low pressure switch is OL, that would be normal?

Do you have to change the filter drier if your swapping a switch with no shrader?

Do the pressure switches come standard with a Schrader depressor so they can be changed out?

Brilliant explanation!

Great video, very informative! Thank you for making this.

Great video!

this helped a lot

Very good information thank you

Great video

Awesome video, I like all of your videos

Brilliant

Another great video

It wasn't clear whether the firs number is when the sensor opens circuit and the second number when it closes the circuit.

Hello there Question. will a defective pressure switch make a condenser unit not cycling off when reaching set temperature? Thanks for any advice....

Thank you for making this video👍🏽👍🏽👍🏽

So, are all pressure switches normally closed

Thanks I wanna know working and cut out and cut in pressure for frions Can u explain if possible

thank you very much sir.

The Lennox unit I just repaired at my home has a pressure switch with a reset button on it. The outdoor unit would not power on at all. I pushed the button on the High Pressure Switch and the unit started running again. I felt a distinct click when I pushed the button which you can not feel in subsequent pushing.

Great Video

Hi, My condenser isn’t turning on due to refrigerant leak and 24 volts are shut off not getting to the contactor. Since the condenser is not turning on, how do I pump the refrigerant into the system to increase the pressure order to run again? Can i still pump the refrigerant when condenser unit is off? please help thanks 🙏

Thanks 👍

So the high pressure switch is NC switch and low pressure switch is NO?

I have an intermittant low pressure fault but it occurrs a few seconds *after* the compressor stops any ideas?

Super sweet video. you da man

Great video sir 👍.. I have 1 question. In case of gas shortage due to gas leakage occurs. Low pressure switch will disconnect the electrical circuit and the compressor will be off. So, what is the procedure to fill the refrigerant gas to the outdoor unit? .. So the compressor can turn on again after we fill refrigerant..

excellent job thank you

About education vedio....... Very nice

You and videos kick ass .. Keep up !!

What happens if I’m checking for continuity and one of the switches is giving me a measurement of 430 ohms? This is when I have my meter set for continuity. The other one just showed 0 ohms.

What would you recommend for cut in and out if the box room 50/55 degree on 404a refrigerant

Thanks for the video =)

What can be the issue standing pressure is good and then compressor comes on the pressure go very fast down and compressor shut off??

My heat pump cuts of in heat or ac mode and flashes 5 times after about 10 min of running. And will not cut back on. Buuuut the pressure is correct all the way up to when it cuts off. Bad pressure switch maybe???

Hi guys. GREAT channel. Had a fault code showing 02 (high pressure switch) and replaced with exact same. Still showing 02? Is there a reset somewhere on the board that I can't find? The compressor & fan work fine ONCE I get the blower motor working. It trys to start 3 short times, then waits. The last time I got it running the speed was sporatic until it stopped? Replaced the capacitor with same a while back & cleaned the blower fan cage. I just have an Etek 10709 multimeter - probably need a new eh? System is an All-in-one outside Q7RE - 042K. Any ideas will be a Christmas present 🎅. Thanks

I have a 2013 RUUD 3.5 ton heatpump, Model #13PJL36A01 with 410a and a 63 ft. lineset. Yesterday it shut off after running 1 minute and 45 seconds. Liquid pressure stays at 175psi the whole time and vapor pressure started at about 50psi and immediately when unit came on the vapor side pulled into a vacuum. LED 1 is on but LED 2 flashes which states low pressure switch open. What are my possible causes? Been running great, filters clean as well as outdoor unit. Indoor unit has TXV at 2 o'clock position as called for in manual.

I have a 95 thunderbird which compressor is not coming on. It has what appears to be a 4 wire high side switch. I was not finding any way to test this 4 wire system.

How would you test if the system went out due to low or high pressure cutout? Thanks!

I have unit that takes 7 lbs of 407 c. What would be the static pressure with the unit off with an ambient temp exceeding 115 degrees?

The example of having the LPS and HPS in series connected to the contactor is wrong

I need that explanation in Spanish, it looks very professional but I don't speak much English, and I had a problem that I think has to do with your video, that's why I'm watching it but I don't understand English very well, I'd like to hear it in Spanish.

Doesn't the compressor have an internal pressure switch?

The question is how do you know which switch has a valve core depressor in them so you don’t Blow the charge when you try to RELACE THEM!