How a Heat Pump Reversing Valve Works

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A quick overview of how a Reversing Valve on a Heat Pump system works. A Heat Pump system is really just an air conditioning system that uses a Reversing Valve to redirect flow of refrigerant that normally goes to outdoor coil towards the indoor coil.
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Опубликовано:

29 дек 2020

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Комментарии : 219

@tunaman2200 3 года назад

Thanks for clearly explaining how the solenoid works

@mdiliyas1279 17 дней назад

I appreciate your efforts to explain reversing valve function in detail

@ThanhTruong-ip5gf 2 года назад

12 year hvac tech here and this guy sure does know what he's talking about 👍

@jollyscaria1922 2 года назад

Vrey good shering gues

@tehpanda64 5 месяцев назад

This is so elegant in it's simplicity, I am glad I was curious as to how it worked. Also I am surprised these haven't been implemented absolutely everywhere 20 years ago.

@spokaneandvalleyhvac1979 2 года назад

This is great. Thanks for clearly explaining this so well and providing the visuals to go with it. Helps alot in understanding how a heat pump systems works.

@paulgaras2606 3 года назад

These animations are so fascinating.

@flatearthdays 3 года назад

What a soothing reassuring voice!

@Butterfly-hs5um Год назад

Thank you so much for this video. I work for AC manufacturer and always been interested in stuff like that. Years of study but only practice verifies knowledge and videos like yours are very helpful to imagine and understand operation of the individual parts. I discovered you by reversing valve ;) I subscribed your channel and want to wish you all the best :)

@mathandtharka7362 21 день назад

thanks for clear presentation of the functioning

@alexcuster1280 3 года назад

These animations are so valuable, thanks Brian, I am sharing with my fellow techs.

@ACommenterOnYouTube 3 года назад

That was a very simple explanation. Thank you

@hugogarcia7574 3 года назад

I really learn a lot from your videos. Thanks 👍

@bourbon.36 2 года назад

After buying my first home back in August, these videos help. Google has also been a big help to assure me it's working properly. I panicked the other day when I heard the valve switch when it went into defrost mode. When I went outside, the compressor was running, but not the fan. Of course the worst thing popped into my head, like great it's broke. Then after some researching, I was reassured it was working as it should. So much to learn about these heat pumps.

@Howie875 Год назад

Phillip you missed the entertaining part of the defrost cycle. When it ends, the outdoor fan comes back on and since the coil was heated, it will blow a big cloud of water vapor (depending on conditions) which looks like a big cloud of smoke.

@robempire 3 года назад

Just saw one changed out today. Cool to see how it works.

@waymonblevins6939 2 года назад

GOOD JOB BRAIN. I LOVE YOUR VIDEOS. THEY ARE VERY EDUCATIONAL AND A GOOD REMINDER TOO. PLEASE KEEP THEM COMING.

@spelunkerd 3 года назад

Wow, what an excellent description.

@narendrachohan1718 2 года назад

This is awesome. Been awaiting long for such type of teaching with animation. Keep up the good work

@DreamLand20 2 года назад

Thanks for sharing this video. It was very clearly explaining and very useful. Great job

@Ivan-qq6dj 3 года назад

Those who thumbs down this video should not be a air conditioner or refrigeration tech please you need to get a job what fits you as a tech on something else and not on the purpose of this beautiful explanation regarding how a four-way valve switches to the proper heating or cooling needed by the customer indoor house so don't knock it off with a thumb down I give it a hundred percent thumbs up thank you for this beautiful video thank you HVAC tech do love everything that is teach basically how to understand pictorial electrical pressures compression regarding air conditioner refrigeration or ice makers

@davehennick9856 Месяц назад

Extremely well worded and presented.

@CHOMAHOMA 3 года назад

Excellent, great content and animation.

@ramsis4050 3 года назад

Thank you so much sir,this one is pretty cool,god bless and have a great new year

@toddt6730 3 года назад

Excellent illustrations

@bottlecapn9593 3 года назад

Thanks for the tips, there's always something to be learned , that's why this trade is cooler than rocket science

@RG_sssSMOKING 3 года назад

Very well said. You are so on point!

@Definitelynottheatf 3 года назад

Best representation I've seen yet

@bamnasitis775 2 года назад

Im so glad I watched this video, thanks for explaining!

@NoorRefrigerationsystem 3 года назад

Thank you so much sir I love This channel ❤️

@mikechiodetti4482 2 года назад

Thank you for this overview video.

@AMbrosWorkshopTips 3 года назад

I love your way of Teaching..

@Bowhunters6go8xz6x 4 месяца назад

Awesome and informative !

@marshalle.s.m.5578 2 года назад

Very good explanation.

@kennymonica3559 4 месяца назад

Thank you for this valuable information.

@azaztec3847 3 года назад

I wouldn't be where I am today both mentally and in the hvac install trade and continually progressing rapidly in said trade and mental wear withal and know how if it wasn't for your intelligence and generosity of openly teaching the details of the trade 🤗🤗🤗🧠💪👨‍🎓🧑‍🔧🕵‍♂️🤔🤔

@Joe_Joe_The_HvacMan Год назад

Outstanding as usual!!

@CommercialGasEngineerVideos Год назад

Good illustrations

@Wdbx831 3 года назад

Thanks for the valve overview - you really provide a valuable service for the industry. Just one thing that would be helpful be is if you go over the failure modes of a reversing valve. From your overview, it seems pretty bullet proof.

@jollyscaria1922 2 года назад

Coil engerzied het pump systom seftey dves good thanlyoi gues rebersing valved is full ok

@Howie875 2 года назад

I have seen only two failures. One is when the sliding piston gets stuck and then it will only run in one mode. Not so bad if you're calling for heat and the reversing valve is stuck in the heating position but then it is really bad when you have a call down the line for cooling on a hot day and the unit is putting out hot air. The second one is much more difficult to diagnose for someone who does not have a good understanding of a refrigerant cycle. I have seen reversing valves leak internally, and what happens is a large part of the hot gas from the compressor discharge leaks in the reversing valve directly into the suction line of the compressor. It will sort of equalize the system pressure and resemble conditions of bad compressor valves but by taking superheat, subcooling and measuring temperatures of all the lines in and out of the reversing valve you can differentiate between the two conditions.

@jollyscaria1922 2 года назад

Revrsing blockinn dreact fixing

@lilkenny123123 Год назад

@@Howie875 wow how long you been doing Hvac?

@Howie875 Год назад

@@lilkenny123123 Hi Kenneth. I am recently retired but I worked as an HVAC tech for about 40 years. I worked in some high-volume shops and after a while you basically see just about every problem you could imagine.

@rafaetkhanrk6475 3 года назад

HVAC School, Thank you very much

@jaimesanchez6933 Год назад

Great explanation, thank you!

@westsidehvac1097 5 месяцев назад

very good training on here many thanks

@MrShifano 2 года назад

Thank you for your efforts

@jeancgoda7225 2 года назад

Very educative, thank you.

@HalfAHandyman 3 года назад

Great video. Thanks

@hvacdoc 3 года назад

Great video, can you do one on replacing the reversing valve?

@patrickhutchins6935 3 года назад

best reversing valve demonstration that exists

@patrickhutchins6935 3 года назад

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@franciscovargas8195 Год назад

Amazing video!

@KhalidAli-zk7up 3 года назад

You are a great person

@hubercats 3 года назад

Great video. Thank you!

@tonytony6912 2 года назад

great video

@TanweerAhmed 3 года назад

Clearly understood and thanks

@Alex-jo2oi 2 года назад

Wow that makes much more sense. Thanks!

@reginaldjames1234 Год назад

Thanks for the video

@CircinusMusic 2 года назад

Thanks for your video

@mdimascio Год назад

Outstanding. Thanks!

@MichaelCowden 9 месяцев назад

This is very helpful for me to understand how to maintain my own equipment at home. Thank you. I am very interested to know the sequence of events that occurs during a defrost cycle of a heat pump. The compressor receives an intense shock to the system when this valve actuates, and I would like to know if compressors for heat pumps differ from simple air conditioners in a way that compensates for this shock load they receive regularly. Also, I have seen systems that measure pressure differentials between outside and inside the outside unit to determine when to operate defrost cycles rather than simple temperature differentials or timers. Is the efficiency gained by a pressure differential system worth the added expense and complexity?

@mirahadali2774 Год назад

Very nice sir....

@ninamcclure2193 3 года назад

That's pretty cool thx for the video.

@MasterCoolSiemReap 3 года назад

Good sharing waiting next video

@drtweak87 2 года назад

Thanks! Installed a Nest Theromostat in my Apt about a year ago almost and I had issues running. Trying to figure out why when i run the AC its pumping out hot air! Little did I know it was not gas powered as I though and was a heat pump! I just though it full on reversed the compressor and didn't realize there is a valve that does that part. Only thing I don't like about it is that 1) since it uses the compressor it is just as expensive to run as the AC and 2) it doesn't get as hot as a gas or electric and takes longer to warm up my apartment and thus costing me more money. Normally my electric bill is 70-100 but its been 130-150 this year for winter.

@clintgray1623 3 года назад

Reversing valve heat pumps have been around 60 plus years I have installed them for 42 years and are 31/2 times more efficient than electric strip heat , and 80% of dealers are afraid of a heat pump, payback for the 200-400 dollars more in cost is less than 1 season Straight Electric heat only should be outlawed for being the Blackest energy one can use for heating

@joechen353 3 года назад

Mr. Clint 1st wanna say I'm litterly discover this Video from what I understand this video is very clearity on Revers valve ... correct me during the video it mention ' Pilot(🔥) valve'

@Gods-Elect 2 года назад

Could you tell me how to turn off my AUX HEAT on my water heat pump Please

@KhalidAli-zk7up 3 года назад

Good job

@andrewthacker114 2 года назад

Great clip thanks .

@TriJayaAc13 3 года назад

Nice brother Thanks

@zuragardapkhadze7595 3 года назад

Great video! What is the evaporators refrigerant maximum temperature heating mode?

@DreamLand20 Год назад

Exellent video👍🙂👌

@Masso1973 3 года назад

Interesting, thank you

@jayhouse3149 5 месяцев назад

*No complicated technical jargon, just simple explanation of how it works; Super easy to understand,* *Thank You! Thank You! Thank You!* | 2 years ago my Carrier single package heat pump PH4Z-060 failed to provide heat. I called an HVAC company to troubleshoot and repair, the technician diagnosed and found the heat strip was burned out and the galvanized housing/box was rusted. The replacement part was unavailable according to the expert. *Long story short, I don't believe that he checked the electromagnetic coil and reversing valve.* My heat pump is 8 years old and I'm considering a Split System to replace it. *'Care to share any advice?*

@amantek3545 3 года назад

Thank u Jesus of HVAC 🙏🏿 for showing us da way

@hkhvac270 2 года назад

Thank you for sharing

@vernonleeper 2 года назад

Thanks for sharing, great video and illustrations. Understand that the pilot valve does the shift, at what pressure should the refrigerant be when in heat mode? I’m not sure but I don’t think my valve is working properly, I’m not getting to desired temperature inside the house. In heat mode, the line going to the evaporator inside doesn’t feel like it’s getting hot enough to provide enough heat to warm up the house. I put my thermometer on the line going into the air handler, ( in between the insulation and copper line) to get a reading as it leaves the outside unit, the temperature reads around 67 degrees F. The gas should be a much higher temperature going to the air handler right?, so is my revering valve not working right or is there something else I should be looking at? Any advice is much appreciated.

@NestorDelgado-fr6pu Месяц назад

How to know the this valve its energized when cooling or heating?.i appreciate your answer.great channel by the way

@rachidhammouch3126 4 месяца назад

Thanks brother

@kennyschopperz 3 года назад

The old Thermo King MD-II's used to have something similar to this, but it was more of a round cylindrical shape, enabled mechanically by the Hot Gas circuit when calling for defrost or heat. They were fully serviceable, I rebuilt many of them......GLAD IT'S NO LONGER A STANDARD LOL!!!

@RalphMercuroMusic 3 года назад

Hot gas bypass...

@00ABBITT00 3 года назад

50 dislikes? Must be plumbers..

@Boojyman 2 года назад

Or Failed hvac techs

@claudioeternod7064 Год назад

Do not worry. This is an excelent video.

@SilverBackELTorro Год назад

😆 word.

@curioushvacguy Год назад

Most definitely plumbers hate vibes, this was a thorough explanation.

@XX-qf5zj 11 месяцев назад

Or painters

@TS86757 3 года назад

Thanks

@user-vy4iw4mu5r 3 года назад

soooo good video

@Delfree77 3 года назад

How do u feel about the hook for brazing?

@94OaxEm 5 месяцев назад

Just finished a module explaining this reverse valve

@bugginryan Год назад

Could you also use a reversing valve to send refrigerant to a heat exchanger to dump heat into a pool vs the condenser?

@kaf2303 Год назад

Well done, do you have any videos of water to water ground source heat pumps?

@flybyairplane3528 3 года назад

Back in the early 60s, I had a CARRIER HP PACKAGE Looking like a large window unit at the BRONX ZOO, where the took care of BABY animals, but we did NOT have the instrumation, we now take for granted All you had were service thermomitors So trying to find a bad 3 way valves, was NOT obvious, unless it was REALLY LEAKING between high/low Another thing NEVER HIT A VALVE BODY, as you can do DAMAGE TO IT CREATING THE SAME PROBLEM CAUSED BY THAT VALVE ! Cheers 🇺🇸🇺🇸🇺🇸🇺🇸. HAPPY NEW YEAR ALL .

@abdulsslamkhierallah5170 3 года назад

Thanks!

@meddaughh.ambrose4990 2 года назад

This was SUPER helpful, thank you; particularly the info. concerning Rheem & Ruud being manufacturers that "fail to" COOLING MODE. With that said, I have a SANHUA Reversing Valve (from Goodman) that when putting nitrogen through the discharge, appears to FAIL TO COOL. Does anyone know if this is accurate? Much appreciated! :)

@mwrarcondicionadoltdarony2175 3 года назад

Tank,you may friend,,

@lawrenceschall3496 Год назад

Very Excellent video. I am replacing the thermostat on an older Nordyne Heat pump with a newer Sensi "Smart" Thermostat made by Emerson. Based on your video may I assume the reversing valve in this Nordyne unit is energized in the cooling mode? May I assume the "O" terminal (orange wire) goes to the reversing valve? This unit has indoor air handler for supplemental resistance heat or emergency resistance heat. The old thermostat is not programmable and strictly mechanical. It has 2 mercury switches in it for main (compressor) and supplemental (resistance) heat. I am a retired technician. I did some HVAC but that was not my specialty. The new thermostat is programmable and can also be controlled via Wi-Fi or mobile data. Larry Retired Sears Tech Electronics and appliance repair 43 yrs

@onofrearellano5750 8 месяцев назад

Super Thks😮

@AMbrosWorkshopTips 3 года назад

Make a video on All HVAC tools a Technican and site engineer must have.

@alanmainwaring1830 9 месяцев назад

You show that just after the expansion Device the refrigerant is in a Flash Gas state when really for the system to work efficiently it is in a high pressure liquid state so most of the outdoor coil will actually be filled with liquid. Near the output of the cooling coils will have a liquid flash gas interface. At the input the pressure is high but at the output the pressure is lower and should be all gas. Also heat is going into the Outdoor coil and this is being pumped from the outside to the inside. Latent heat of Evaporation is the real clever part of heat pumps. Heat is going in but temp is not rising,

@catsmeow5566 Год назад

Thank you for this. Hmm.. I wonder if this could be the problem with my system-- the reversing valve not working properly. Back during winter we turned the heat on but after it warmed up a bit we turned it back to cool mode but it was heating instead. The outside compressor (which was 12yrs old) died. Took a few months to get someone to actually come out and diagnose. We replaced the outside unit with a matching unit designed to work with our inside unit (Trane brand). Had it professionally installed and cooling was working. But now it is set to cooling to 70° but its heating instead (got to 77). I turned it off and things cooled off. I'm hoping its not something wrong with the new unit (although it is under warranty) but maybe its the reversing valve. Where exactly is the reversing valve? Is it inside the internal unit or the outside unit or somewhere in between?

@mehrespand_ir Год назад

Nice

@YourLocalIceMan 2 года назад

4:33 does all the heat come from outside? How much comes from compressing the gas? If any?

@douglaswindsor120 3 года назад

Since I can't get a HVAC INSTALLER TO CHANGE an old built-in version to heat pump where can I get a valve there are utube tutorials on how to pump out the old refrigerant out and how to fill but nothing on the valve until yours

@PHamster 2 года назад

Ruud, Rheem, Gree Flexx, MrCool Universal, ACPro X Series

@thisisyourcaptainspeaking2259 2 года назад

Good to know, thanks! ;)

@larryzdanis5377 6 месяцев назад

Great video.. one thing that puzzles me - when the system is in heating-mode, the refrigerant lines are used for the opposite purpose of cooling. Since the lines are not the same size ( my suction line is 3/4 and liquid is 5/16), aren't the lines improperly sized upon reversing? Is there a performance loss in heating mode due to the improper sizing.

@caesarorellana508 3 года назад

Thank you we have heat pumps at my job 416 units not all of this until but the 4 bedroom apartment does.

@jordanbenaderet7929 Год назад

Do you have any section drawings or diagrams that you can share for a heat pump system in a residential high-rise? i.e. whole package install including drip pan to external drip pipe outlet on the facade of a building?

@mohamedazzam1352 3 года назад

What is the problem when the touching tube in reversing valve (is there any problem if we have touch in 2 line)?

@comfortdiagnostics6780 3 года назад

Awesome video!! Why does it hiss when it switches over?? I know it's reliving pressure but you explain it do we'll.

@dd___dc 3 года назад

It only hiss wen da AC getz turn on

@ZzzRoofus 2 года назад

That hissing noise you heard is called hydraulic hissing. It's just the flow of the fluid you hear through the pipes, same way you hear water flow through water pipes in your home. The expansion valve or any restrictive device which interrupts the flow will cause a noise. Same way if you have roof racks on the roof of a car, you hear a whistling noise because the flow of air is interrupted.

@AlessioSangalli Год назад

I would like to add a reversing valve to.a.common refrigerator so that it can heat up as a proofing chamber when needed. As the conpressor on a fridge is not as powerful, will a reversing valve out of a heat pump still work and be able to switch? Or not ..