A Comprehensive Guide to Testing Reversing Valves for Optimal Performance

Unlock HVAC Expertise: Lennox Learning Solutions guides you through the essential process of testing a reversing valve for optimal functionality.
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[@davemcddd]

Absolutely incredible way of using a video to explain how the reversing valve works, and two ways to test it in under 2 minutes. This is a perfect example of how beneficial KZbin can be.

[@ZsOtherBrother]

Wow, hacking a valve to test it, explaining everything simply and clearly, and communicating all of it in under 2 minutes... I wish more KZbin videos were like yours. Thank you :)

[@jollyscaria1922]

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[@primusheating1]

Good video. I have been in the trade for 23 years and 1st time seeing a magnet used. Good info! Great video.

[@jollyscaria1922]

Thankyou gues

[@countryfriedhvac]

You just blew my mind with that magnet trick.

[@AlexanderOrona-m1g]

Johnson Controls video said anything over 5 degrees difference is bad, you say its 10 to 11 degrees. Think I will use 7.8 degrees. lol

[@bobbyatman273]

Ohh wow just in time I found this! looking to tear into my unit this week to get to reversing valve, this is PRICELESS!

[@RafAelHernandez-yf2tu]

That is the coolest thing I’ve seen really gonna help out

[@MrSoe-wn9qg]

Thanks you very much sir😊

[@Justarandomspacemonkey]

That magnet trick works only if it’s stuck, you need to get your discharge and suction line temp differential to check for one that is bleeding. Learned the hard way

[@cleansebob1]

Can you elaborate please? I've got one with low head / high suction I need to figure out.

[@Justarandomspacemonkey]

@@cleansebob1 maybe compressor valves, are the pressures equalized? If so check to make sure that your compressor is running. I don’t know what your experience level is

[@Justarandomspacemonkey]

@@cleansebob1 find the discharge and suction lines, put a temp prob on each one while it’s running there shouldn’t be much difference

[@attheendoftheday8969]

I've tried using a big magnet on it tonight but it didn't budge. Also tried a hand held back massager to help loosen if it was stuck but still didn't work. Might have to just remove the shroud and check for 24v and do the screwdriver in the hole test

[@wd8557]

Will the magnet work the same on the other side of that valve. Say it was installed the other way.

[@اغانيالزمنالجميل-ع6ز]

Sweet I needed that last week too bad I didn’t see your video then but thanks a lot

[@eracismm]

Thanks, great info with a good presentation.......

[@ghleader2179]

Great idea for the magnet

[@laneburgess1643]

That is a great idea!!!

[@bryanhauschild4376]

Is there ever instances where the circuit board energizes the valve to the incorrect location?

[@MrCt333]

10 to 11 degrees difference? Where are you getting this information at? I've always seen and heard 3 to maybe 7 degrees, typically the valve will absorb some of the heat but that is a large difference. Please reference your source so I can research this further, thank you. Never seen the magnet trick.

[@vanhogan2179]

Awesome,thanks

[@cleansebob1]

Do we expect the true suction line to be warmer or cooler than the vapor line? I'm guessing warmer...

[@GrayRefrigerationWorkshop]

Hi Mr Gray

[@henryperez5404]

This is so goof good stuff

[@samho9318]

Good video, I assumed Lenox equipment is default on heating and in cooling mode the RSV required 24v to shift? Does anyone know which are the 2 manufacturer does the opposite? TIA.

[@samho9318]

@@HVAClearning Thank for a quick replied👍

[@farizdavlatov1956]

Question: what can be the reason of dropping down pressure in the suction line when u run the compressor of heat pump( from 80pcs to 0pcs) within 20sec, seams gas not recirculating. the following items on the circuit installed:Reversing vale, Expansion valve

[@sofarleftturnigright]

Sounds like your Txv power head has lost its charge and is unable to open causing the pressure to drop.....could also be low refrigerant charge or a restriction in the circuit somewhere

[@amazinggrace831]

How many lbs is the magnet 🧲? I tried this on a know working unit and my magnet did not move. It was a 5 lbs magnet and it looked a bit smaller than the one in the video?

[@jonarnstrng123]

what about just hooking up your gages

[@vnesmuonnam]

That is cool

[@2ndAmendmentGlock]

How do you conduct this test on a condensing unit? Can this be done with the fan at the top removed?

[@Z-Ack]

Theyre usually on the outside of the fins behind another cover plate next to the service valves..

[@eddygoodwin7089]

is it possible to free up a reversing valve that is sticking or it that a lost cause?

[@eddygoodwin7089]

@@HVAClearning thank you

[@rvamtbram]

Mine was occasionally not going into full cool mode under defrost, but only in 40+ ambient temps. I ended up getting the emerson universal defrost board so there's a delay going into defrost and that seems to have fixed mine. I also swapped my contactor while I was in there since it was pitted and the defrost delay will cause more cycles

[@eddygoodwin7089]

@@rvamtbram thank you

[@DWAYNE2ism]

Cool

[@mwdub02]

It’s never a clear cut diagnosis when it comes to reversing valves because if the compressor is shot then you’ll never know if it the compressor or the reversing valve?!?!

[@mackenziegray2090]

Do a pump down, if it pumps down then your compressor is fine.

[@mwdub02]

@@mackenziegray2090 that’s legitimately valid if you have service valves to do a pump down. But if you ever worked on a water source heat pump. Or a package rooftop unit. It’s very hard to tell.

[@jon3862]

🤝👌👍

[@jeffweaver955]

Absolutely genius. Thank you so much!

[@trakyboy5128]

Good visual !!! Bad sound recording

[@mountainklima5602]

CLEAVER AND SIMPLE , NICE

[@GtrMan863]

My heat pump reversing valve occasionally goes to the wrong position but works most of the time, I notice this when it was blowing out heat in the summer now that its cold it was blowing cold air and its winter, any ideas,

[@PosiP]

I love the magnet.

[@biblebloopers946]

Wtf? Never seen the magnet test before

[@jely7698]

THANK YOU!!!

[@ayyanarselvam4758]

Very good vedio sir...

[@gotchaplumber]

Good points.

[@Drtrev]

Thank you !!

[@rikmiles6531]

That is a cool trick

[@Z-Ack]

Touch test.. what if its too hot to touch?

[@mackenziegray2090]

You're only concerned about the two suction line. Should not see anymore than 5°F difference on the two suction.

[@maness2112]

Put a cap on that service valve, it driving me crazy.

[@rpm12091]

marty maness Yes, one of my pet peeves.