HVAC Low Airflow Diagnosis! 5 Methods to Determine if an AC Coil is Clogged with Dust!

In this HVAC Training Video, I show the Tools, Methods, and Step by Step Instructions for Determining if an Air Conditioning Evaporator Coil on a Gas Furnace is Clogged with Dust When You Can't Visually Look at it! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
Tools Used In The Video
FieldpieceSDMN6 Dual Manometer Pump - amzn.to/2jyK5Ka
UEI Digital Dual Manometer - amzn.to/2CWC6BD
Teslong TD500 Camera -.01wc -10.0wc - trutechtools.com/teslong-td50...
Video scope: trutechtools.com/teslong-td50...
Static Pressure Tip: trutechtools.com/Magnetic-Sta...
UEI EM201B Manometer: amzn.to/3R5WmEx
UEI EM151 Manometer: amzn.to/3sDgl50
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Methods
0:00 Intro
0:16 Method #1
3:12 Method #2
4:47 Method #3
5:28 Method #4
6:18 Method #5
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Our Related Article/Videos
Finding an Airflow Problem using Static Pressure Measurements Article: www.acservicetech.com/post/fi...
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• 20 Causes of Low Indoo...
• HVAC Temp Rise Formula...
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⚠️ Disclaimer:
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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#hvacr #hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #accoil #coil #clogged #cloggedcoil #filter #dust #gasfurnace
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[@zesty2023]

Teslong has just blown up in HVAC. I was the first ever to use one at my job, then my boss had all the other techs get one. Then I changed jobs and all the techs there were using them to!

[@YTsux24-7]

Thanks Craig! Coil manufacturers should be required to install a clear window or two piece panel so the top can be easily removed for inspection. My 2 cents...

[@paulrozinski1488]

How about we take it one step beyond that……. Make a hatch / door that can be opened for cleaning without having to disassemble half the unit.

[@woodrowwilliams1812]

@@paulrozinski1488If it didn’t void the warranty we could make our own.

[@johnmarietta594]

And a larger window in blowe door to see light or codes on control board

[@shawnrender6935]

Nice video. Thank you! That inspection camera is nice. On my wish list now ✍🏽

[@cabbagesoup7879]

Best videos!! Learn so much. Thank you

[@deanmartin1966]

Great video. I do like the scope with the movable head. I might have to get one. Thanks for sharing

[@Mudcat597]

Nice info! Thanks for sharing 👍

[@MsFishingdog]

Great video.

[@zekenzy6486]

Great Video. Thank you for sharing. Have a nice weekend

[@user-kn7cp4me8n]

Craig, man you haven't been chaging your filter

[@williamserver4332]

This was a great video. Thanks for all your help.

[@SalahDambo-gb6cs]

The only people who do not change from the truth

[@waltherherrera67]

Excelente muy bien mil gracias

[@hozerhvac4406]

Love teslong scopes

[@victorseals3660]

YOU ARE MY CAREER!!!

[@zahedaminullah6934]

Amazing explanation as always. Hopefully the apprentices follow this method that way they are not orderjng EVAP coils lol

[@acservicetechchannel]

If you want to know where the video scope is from the links are here, thanks! Video scope: trutechtools.com/teslong-td500-articulating-endoscope-inspection-camera.html?aff=8 Digital Manometer: trutechtools.com/shop/?search_query=uei+manometer?aff=8 Use this code to save 8% at Trutechtools!: acservicetech Free Calculators, Quizzes, Articles, Podcasts, Quick Tips at www.acservicetech.com

[@perez2877]

Excellent explanations, I woul like you can make a video about in the field service and the prices for each services !!!!

[@andyreyes6464]

good video, i have a question. could you make a video talking about vrf & vrv. thanks

[@-_-TJde]

How would you go about cleaning the air side of a secondary heat exchanger on a residential furnace?

[@robertwojtowicz933]

If you fat, you’re not gonna be able to slip inside the furnace to look at your coil 😂

[@shawnrender6935]

🤣🤣🤣

[@paulrozinski1488]

Another informative diagnostic video however, the bigger problem seems to be HOW to correct it. Face it, manufacturers don’t make it easy to access the A coil, especially those of us with a plus size waist😂.

[@UltraHydrophobiccoat]

Especially in a very tight closet and the coil is on the top

[@Josh-px6xb]

Need to put the coil out and clean it in that case

[@SalahDambo-gb6cs]

Good work, may God bless you

[@povoljan13]

What boroscope camera is that?

[@billy5032]

What about pumping down and pulling the coil to clean or is that something you stay away from?

[@boywhohadatiger]

Not necessary unless it’s a gas furnace or you have no possible way to access it. Most coils have panels on them that you can take off and access the fins , there’s coils that are easily accessible and even if you have a furnace or air handler you can slide the coil out slightly on some units and get a opening to cleaning it. Always use a shop vac on the drain line while doing it

[@NorCal-refrigeration]

That’s how I’ve done it for 36 years

[@johncote2776]

I've never been able to access under a Rheem "N" style coil. The coil plate is not able to be removed

[@boywhohadatiger]

@@johncote2776 on that one you have to get it from underneath or pull it that’s a tough one.

[@johncote2776]

@boywhohadatiger Yeah, in the past I've recommended pump downs or I'll hit it from the top with the expanding foam coil cleaner.

[@w0lvez1]

Easier and faster to use a laser tachometer to check blower speed RPM.

[@The1realro]

What would that prove aside from rpm

[@w0lvez1]

@@The1realro It proves the motor & capacitor are in good condition. Of there is a lack of airflow issue it's probably due to a very dirty inner coil or excessive dent on the aluminum fin.

[@torres33666]

Sou técnico de ar condicionado de maquina de lava roupa e também conserto refrigerador, como eu faço para trabalhar na sua empresa.

[@heres1-two-cents]

Shouldn't method 3 be first because I'm sure many beginner tech do not have thoses expensive tools

[@Falcon-hl6jf]

Depending on the complexity of cleaning the coil. I’d offer to sell them a proper media air filter cabinet. And then throw the cleaning in for a discount or free.

[@throttlebottle5906]

just replace the coil and add large filtering. (replace it all?) if small home and penny pinching, I would clean on spot. pretty much nobody will do that, because it will take hours to tear down/rig/clean and no guarantees of nothing else being bad and causing full replacement of equipment anyway! yeah, it sucks but in reality, just replace it all upfront and point to it's warranty (while looking dumb). warranties are an failed pyramid scheme from many years ago.(welcome to the earth, the failed pyramid scheme planet). yep