Commercial HVAC Call/ Thermal Expansion Valve Stuck Open

Рет қаралды 20,717

4 жыл бұрын

During this commercial HVAC service call, I found a dead condenser fan motor, noisy refrigerant pipe and a stuck open/hunting thermal expansion valve. I used the gen 2 Testo Smart Probes and Smart Probes app to diagnose the problem.
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Пікірлер: 41

@billrimmer5596 4 жыл бұрын

I really enjoy your vids. I need to learn more about those two terms u used. Subcool and superheat. Like the idea of an adjustable Tx and really like your Bluetooth gauges. I saw that device in one of your other vids. I do mostly automotive AC. Thanx again!!

@HVACKnowItAll 4 жыл бұрын

Here is a video where I talk about the basic refrigeration cycle kzfaq.info/get/bejne/l8CpZcx42pO6eZ8.html and a podcast discussing saturation superheat and subcooling anchor.fm/hvacknowitall/episodes/HVAC-Education-and-Saturation-wRick-Ruscigno-e3fhhn. I appreciate the video support, thank you

@fret2fret221 2 жыл бұрын

I was on a York the other day. Found a big leak on the discharge line U bend. It had been pushed and rubbed up against the metal on the end of the condenser coil.

@austincowan9235 3 жыл бұрын

Great video 👍

@HVACKnowItAll 3 жыл бұрын

Thank you!

@justincanterbury2561 4 жыл бұрын

Good video!

@HVACKnowItAll 4 жыл бұрын

Thank you

@David.rivas.alexis 4 жыл бұрын

Very interesting

@mns.gh6432 3 жыл бұрын

Thnxs more we from Iraq follow u always

@HVACKnowItAll 3 жыл бұрын

Cheers

@mikeclark1756 4 жыл бұрын

hearing the refrigerant building and releasing in the refrierant piping , is that somthing remembered from past experience..... like hey I remember that sound . That TXV might be over feeding ( sense of hearing to troubleshoot)

@HVACKnowItAll 4 жыл бұрын

Exactly Mike!

@mikeclark1756 4 жыл бұрын

The shroud is called a fan orifice . Hmm ... York Term only ? Can you change the cage on the TXV . Looks like a Sporlan Great Video . Great job breaking down everything down so the inexperience guys can understand .

@HVACKnowItAll 4 жыл бұрын

Thanks Mike, the customer didn't want to pay for any further repairs since the unit is bening replaced shortly.

@armandoacevedo932 4 жыл бұрын

Good video's 👍👍👍👍

@dfigueroa903 3 жыл бұрын

Hello, how are you... Spoke with you in reference to the testo 770-3 meter and it's a pretty good meter... I use it in residential electrical HVAC furnace appliance repair and automotive modes and it's a pretty good meter.. like the set of the watts and PF on one display... The only negative is no light, but it's not a dealbreaker.. This is one of my main goal to meters us now... Thanks..

@mikefreedom5612 4 жыл бұрын

Thank you

@HVACKnowItAll 4 жыл бұрын

You're welcome

@perrysaunders777 3 жыл бұрын

I have three very old tx valves I'm trying to bench test, because I can't get a replacement. They don't seem to do anything. Should I be able to detect the opening/closing somehow? Does the tx valve ever completely close?

@kcomfortsystemshvac7060 4 жыл бұрын

Great video,,,!, example,,,,if you that TXV,,can you adjusted,,,what should be the standard ? 8F - 12F ? I am rigth ?

@HVACKnowItAll 4 жыл бұрын

Most likely but I did not look into it further

@MAZA4lyfe 2 жыл бұрын

What if your problem is low to no super heat. And high subcooling. 33-35 evap sat and 69 degree cond sat low ambient around 56-59 degrees. Return air 70 supply 40ish Evap clean and condensor clean and good airflow on both... Could this be stratification? Or something else.

@1984juant 4 жыл бұрын

Is that a good phone? Thanks for your videos and podcasts

@HVACKnowItAll 4 жыл бұрын

Haha not really, it will never break tho, trust me I've tried lol

@HVACKnowItAll 4 жыл бұрын

And thank you

@benh2156 4 жыл бұрын

Canada's phone systems(companies/contracts) suck. Wompwomp! Great video tho!

@HVACKnowItAll 4 жыл бұрын

Haha thank you!

@HVACRNorth 4 жыл бұрын

👍

@kennyw7453 4 жыл бұрын

Just curious, during the winter wouldn't you be using economizer for free-cooling rather than mechanical cooling? Thanks

@HVACKnowItAll 4 жыл бұрын

If it was a packaged rooftops yes for sure. This was a split AC unit.

@kennyw7453 4 жыл бұрын

@@HVACKnowItAll Well that explains it. I guess I assumed it was an RTU. Thanks for the reply.

@HVACKnowItAll 4 жыл бұрын

@@kennyw7453 my pleasure

@fokuspimp360 4 жыл бұрын

So, question, the compressor sweating, wouldn’t that be a normal thing? The suction line sweats, because of the condensation. So, wouldn’t that be the same for the compressor she’ll?

@HVACKnowItAll 4 жыл бұрын

Some sweating at the suction line entrance yes, but not the entire compressor.

@fokuspimp360 4 жыл бұрын

HVAC Know It All ok, appreciate the response back