How to find a low voltage short HVAC Basics

Рет қаралды 38,064

Күн бұрын

Typically the fuse is wired in series with the hot side of the transformer. This is me putting an example together so you can learn the process of troubleshooting. I was so concerned aboout the wiring as much as I was the diagnostic thought process.
Troubleshooting Low Voltage Short HVAC Basics
• Troubleshooting Low Vo...
If you want to learn more about relays and transformers check out the video
• HVAC Transformer and R...
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#lowvoltage #lowvoltageshort #hvactroubleshooting

Пікірлер: 171

@AKIRAYADAO 5 күн бұрын

I am a new subscriber, coming from water and sewer operator of 20+ years, I have recently changed careers to a facility engineer and just got my EPA 608 universal certificate, watching your videos ,have inspired me to futher myself in the HVAC field. Thank you so much for the inspirational and educational videos.

@TaddyDigest 4 күн бұрын

You're welcome brother Glad I could be here to help You are going to do great things

@jamesortolano3983 2 ай бұрын

" ill keep you COOL if you let me " love that closing line Tad.. Thankx for the content, much appreciation to you for the time you make for us fellow HVAC techs

@hvac1017 2 ай бұрын

man ill be honest 24v was my kryptonite before this video BUT you just made it simply and easy to isolate. much appreciated

@richardvarnado1130 9 ай бұрын

I am a new subscriber, and I occasionally watch some videos out of curiosity. I’ve been in the business of AC in Refrigeration for 18 years and I watch different videos just to see what knowledge the person has and how he applies it the way they explain it. and you do an awesome job. you are and have been a blessing to a lot of people. Thanks for passing all your knowledge on. !!!

@TaddyDigest 9 ай бұрын

Thank you, my friend. I'm so glad you like the video 📹 😊 . Please 🙏 stay around

@joshrich5114 4 ай бұрын

I just started my HVAC journey as a technician and I grateful for the tips

@texture6 Жыл бұрын

It’s nice to see the components laid out but in the real world when you open a unit, it’s a whole new world. I would like to see the transition of a simple layout to a real world on the field layout

@cattoc 11 ай бұрын

Charlotte, NC Thank you for the well made video! I am chasing a power issue on a air handler after a lightning strike. I have good power to the transformer but then nothing. I am also getting nothing from the thermostat wires

@1337emtff 11 ай бұрын

Thanks ,from Bedford VA

@JesseJayRock Жыл бұрын

Hey buddy, my name is Jesse. I've been working in AC now for almost five years. Started as an Res. Installer from the school of hard knocks, made my way to lead and quickly became the A Team. Now I am a Area Manager for a New build Company and am trying to learn more tech work to be able to service friends and family and eventually my whole City! Thank you for your videos, I can't help but share them with all of my AC buddies. God Bless and keep em coming!

@TaddyDigest Жыл бұрын

Hey Jessie thank you so much For sharing my videos that helps me tremendously I want to send you all of my guides Here is My email tadfuller1@gmail.com

@busyinyahawahwayahawashi5369 Жыл бұрын

Lucky you am nearly starting out they gave me 1 month to train & now they have me doing services calls & messed up or took to long on a call now they wanna fire me smh

@hugogarcia7574 Жыл бұрын

Thanks for teaching in Taddy. Houston texas

@noahbaggett9037 Жыл бұрын

Forgot about the rvalve solenoid . Just had a trane one shorted and I used a magnet to shift it into cool . Until I get the correct solenoid

@maurilioarredondo3403 6 ай бұрын

I'm a new subscriber from the jem of the desert Coachella California ,thank you for all videos

@duprewinston4346 Жыл бұрын

Thanks brother we are up an running again. Just in time cause it's 67 degrees in the Bay Area. And we were getting worried about frost bite...lol

@lahoucinelamlih3214 Жыл бұрын

Got yourself a new subscriber, keep'em coming buddy

@explorador13-ul6os 5 ай бұрын

i am a new subscriber..love your videos

@TaddyDigest 5 ай бұрын

thank you so much 😊

@llroman7823 Жыл бұрын

Excellent video. Thank you for explaining so clearly.

@TaddyDigest Жыл бұрын

Your Welcome 🙏 🤗

@edwinayala6145 Жыл бұрын

Edwin, Denver thank you excellent video!

@AZ_sunshine Жыл бұрын

thank you! It amazes me to see how hard professionals work to help other. God bless you. You are a good instructor and impressive how you set up models to really show how things work. I susscribed and look forward to your other videos. Again Thanks. You are a hero.

@TaddyDigest Жыл бұрын

You're welcome thank you so much for your kindness

@stansummers6259 Жыл бұрын

Great video from Cadiz ky

@rv10flyer84 2 жыл бұрын

Lots of insulation worn through on vibrating Goodman units. Most manufacturers do not tie wrap the wiring properly. When installing new systems, I pull the top and go down inside to foam tape and secure the wiring. Otherwise you'll be called back out in 3-10 years.

@TaddyDigest 2 жыл бұрын

Going to extra mile I love it

@bob-flowers6626 Жыл бұрын

Thanks for the low voltage video tips!

@TaddyDigest Жыл бұрын

You're welcome

@mikemike7397 5 ай бұрын

Sub for sure bud! Saw 3 of your vids and you saved my behind on all of them

@carvajal01 Жыл бұрын

Thanks from Chicago illinois

@staceysmith225 23 күн бұрын

Thanks 👍🏽

@TaddyDigest 21 күн бұрын

Any time!

@bojack2740 5 ай бұрын

Subbed. Thanks for your time man

@TaddyDigest 5 ай бұрын

Absolutely you're welcome

@shawnlarrowe5870 Жыл бұрын

Just joined. Great info!

@TaddyDigest Жыл бұрын

Awesome! Thank you!

@chrisbrower6857 Жыл бұрын

Awesome video Brother! Thank you

@TaddyDigest Жыл бұрын

You're welcome 😊 Thank you for watching my friend

@kingtony1818 Жыл бұрын

You a great technician.!!

@TaddyDigest Жыл бұрын

Thanks king Tony

@sacapuntasfregerio4274 8 ай бұрын

0:30 🔔

@stansummers6259 Жыл бұрын

Great video from Cadiz Kentucky

@TaddyDigest Жыл бұрын

Thank you

@stansummers6259 Жыл бұрын

U do have very very good videos and very well explained thank u for all that sir

@soloch69 2 жыл бұрын

Great video thank you keep them coming

@TaddyDigest 2 жыл бұрын

Thank you so much Let me know if you have any ideas of content I could do to help other techs please Thanks for supporting Stay Healthy my friend

@1madrs637 Жыл бұрын

Have been trying to chase low voltage short. New contactor, new board, now the 5A blows when both thermostats are on off, was just blowing every few days, eventually just started blowing immediately with every new fuse, this is also with outside handle fuse unplugged.

@JR-ch8rt 2 жыл бұрын

Thank you 😊

@TaddyDigest 2 жыл бұрын

You're welcome J R Thank you for watching

@hvacrzone5390 Жыл бұрын

Awesome Advice!! 👍🏽👍🏽

@TaddyDigest Жыл бұрын

Thank You

@joprilsubano0405 Жыл бұрын

Thank you so much boss,for all you awesome videos,I always watching from Philippines ❤️❤️❤️

@TaddyDigest Жыл бұрын

My pleasure!

@user-tj2ws6hf7v 11 күн бұрын

Great video but we need more new one on Fan centers and their transformers I know that their old but there's no good KZfaq videos that explain how to wire up

@TaddyDigest 11 күн бұрын

What is a fan center

@user-tj2ws6hf7v 11 күн бұрын

It's what they use on the old furnaces instead of the mother board

@user-tj2ws6hf7v 11 күн бұрын

Thanks for the response

@soloch69 Жыл бұрын

Great video like always my friend 👍🏻

@TaddyDigest Жыл бұрын

Thank you very much my friend

@gonzalomartinez2866 5 ай бұрын

Miami here. Thank you

@TaddyDigest 5 ай бұрын

You're welcome

@jeancadet7175 10 ай бұрын

That’s fine I like it

@carlosdixon9530 7 ай бұрын

New subscriber you are very informative and creative in your approach it helps me a lot with me being a young tech you have given me skills now I build on and a great tech thank you boss I’m from Durham Nc

@TaddyDigest 7 ай бұрын

Awesome, thank you!

@chilln01 Жыл бұрын

Tad is the MAN!!!!

@TaddyDigest Жыл бұрын

Thank you my brother

@justinmo9198 Жыл бұрын

Justin Mo - HHI, SC Really appreciate your videos. 1- very intellectual and helpful 2- refreshing to know you agree with a LOT of how I operate. Thanks brother

@TaddyDigest Жыл бұрын

I appreciate that Thanks Justin 😊 🙏 ☺️

@tenguestay Жыл бұрын

Thank you H town

@TaddyDigest Жыл бұрын

Your Welcome Glad you watched 👀 😊

@timjohn8963 10 ай бұрын

Am from Randallstown MD need help with ac unit keep blowing 5 amps fuse on control board when I turn the power on

@bellamaesuniverse6462 Жыл бұрын

What part of the system will i find the ressetable fuse?

@cashonlyj3469 Жыл бұрын

Ol' Taddy howdy from Paris

@TaddyDigest Жыл бұрын

My brother j thought about you today Hope to see you soon

@cashonlyj3469 Жыл бұрын

@@TaddyDigest Amen sounds good

@bojack2740 5 ай бұрын

A bit confused when you said the fuse is protecting the transformer. I thought it's supposed to protect the control board.

@user-vx5kf9xi2u Жыл бұрын

That is helpful, how do you find a short when a 3 amp fuse blows after furnace has been running for approximately 4 hours, heat or ac mode

@TaddyDigest Жыл бұрын

Check out my other videos on low voltage shorts and it should give you the knowledge you need

@brianszuch6774 8 ай бұрын

Finally a guy that really knows his poop.. Nice video

@TaddyDigest 8 ай бұрын

Thank you for watching

@bradyates7046 7 ай бұрын

how do test for a short in a ventaion control

@MrCodyniswonger 6 ай бұрын

Need help old house went through 6 transformers i have an inline 3 amp fuse but its not tripping. Instead transformer continues to blow. Would love to get some advice anything would help. This is for my mother ❤❤. Happy Thanksgiving any and all who help you are very very appreciated

@carvajal01 Жыл бұрын

I'm fixing a old carrier package and find that gold , how you call the little breaker 3.2......the machine does not make any noise, but start to see not 24 volt, termostato doesn't work......when I saw that part, I said something is wrong with this.........

@MrMultitool 2 жыл бұрын

Good video Tad. I like and use Fieldpiece meters too but I wish they would offer a set of leads that had straight end alligator clips. How hard could it be! Do they not see how inconvenient these are.

@TaddyDigest 2 жыл бұрын

Thanks TP services Your right. They definitely should and could easily if they wanted to. Good Idea.

@johnvirgilbasto362 2 жыл бұрын

Thanks Ted, Awesome. Can u make a video for Troubleshooting a package unit...

@TaddyDigest 2 жыл бұрын

yes John I can help 😀 Heat pump or gas heat?

@johnvirgilbasto362 2 жыл бұрын

@@TaddyDigest I'm from guam, It's a tropical weather so cooling only no heating... But anyway, Love ur videos man. .. very helpful.. more in troubleshoot plss

@TaddyDigest 2 жыл бұрын

ok deal thank you

@stansummers6259 Жыл бұрын

My condenser fan and compressor won’t start up I have 240 volts to outside unit and 29 ohms to coil so any ideas

@elizabethprusak Жыл бұрын

Mark from Indy, thanks Taddy very helpful, most common short for a bryant AC unit ? I have not yet started the process of elimination, but going to start...also can you recommend a good meter? thanks very much

@TaddyDigest Жыл бұрын

You're welcome thank you for watching I use a field piece But there are a lot of really good meters out there

@linnell6103 Жыл бұрын

Can you make a video on high voltage shorts?

@jeromefriolet9076 3 ай бұрын

When you say the contactor coil resistance is way off, im guessing your saying the coil internally got damaged and might be reading Kohms or Mohms? Or short to ground?

@TaddyDigest 3 ай бұрын

typical contactor ohms for a 24 volt coil are around 10-15 and when damaged will read like 3 😁

@armandolopez5826 Жыл бұрын

👍

@stansummers6259 Жыл бұрын

Do u have any videos on fan coil units

@TaddyDigest Жыл бұрын

I do not But I'm working on it

@twob4plank Жыл бұрын

I definitely will try this,because my fuse keeps blowing.Thanks

@TaddyDigest Жыл бұрын

You can do it!

@roqueherrera2692 Жыл бұрын

Need help diagnosing ignition modules on furnaces

@TaddyDigest Жыл бұрын

OK I will do a video of this soon

@galigalindo6839 13 күн бұрын

I check most of my new contactor has 15 or 16 ohms. Is that ok ?

@TaddyDigest 13 күн бұрын

Yes that is fine

@sonnguyen-ve7gn Жыл бұрын

Hey Taddy, I need your help to HVAC trouble shooting during working on the field. how much do you charge like a month or a year

@TaddyDigest Жыл бұрын

Hey I can definitely help you Check out my membership levels Join this channel to get access to perks: kzfaq.info/love/uMyjTVlkM4xZ5z_eSyoB1wjoin

@gotchaplumber 2 ай бұрын

Is it better to put fuse on common or red or does it matter?

@TaddyDigest 2 ай бұрын

Better to put it on red

@gotchaplumber 2 ай бұрын

Most fuses are on red side. Does it work the same on blue(common)?

@TaddyDigest 2 ай бұрын

yes that's where it's usually at

@biblebloopers946 2 жыл бұрын

I'm confused. Why do you have the low voltage fuse wired in on the 24 v common side and not the 24 volt hot side? I usually see this fuse on the hot side

@TaddyDigest 2 жыл бұрын

your right that is typical wiring I was just throwing an example together.

@TaddyDigest 2 жыл бұрын

trying to help someone develop an understanding of where to start and what the process looks like

@carlossaenz4075 Жыл бұрын

Great , texas,

@zzyzxRDFwy15 Жыл бұрын

Hi I'm Joe and I shorted out and destroyed my HVAC 120/24v transformer twice because I'm a do it yourselfer who doesn't fully understand what I'm doing. I hope I've learned to use a fuse on the secondary wire from now on.

@Inverselattice0 10 ай бұрын

How do you test if there is no fuse wired in anywhere

@WORDTOMICHAEL 11 ай бұрын

I would like to join your club

@hustleletters8159 Жыл бұрын

What is the size of the resettable fuse or brand

@TaddyDigest Жыл бұрын

3 amp

@JP-ku3he 3 ай бұрын

With the resetable fuse do you just add a female and male connecters with wires straight to the fuse?

@JP-ku3he 3 ай бұрын

Also is the button hard to press when it's not popped?

@TaddyDigest 3 ай бұрын

very easy to press

@JP-ku3he 3 ай бұрын

@TaddyDigest Yeah mine feels stiff like you can't even press it so even when it's not reset it's easy to press?

@JP-ku3he 3 ай бұрын

Actually it's stiff when not popped and it just popped when I turned AC mode on but when furnace is on it never pops

@JP-ku3he 3 ай бұрын

No info ? Just a heart?

@brentp1007 6 ай бұрын

Hey my friend, been watching your videos Also been in the field for about often on for 26 years. I’m stumped on this Bryant 95% furnace fan turns on for 90 seconds inducer kicks on for about two seconds and then pops. My three amp fuse. I have checked everything. I have exhausted my knowledge can you help me diagnose this please?

@TaddyDigest 6 ай бұрын

Check the limit switch on plug it and bypass it and then see if that stops the fuse from popping.

@Yaxchilan Жыл бұрын

hi im from WA, you're the first man ive found realy attractive in like 5 years.. i am old and 38 but tell me more...

@JustPlumDucky Жыл бұрын

Where do I find that link for the resettable breaker?

@TaddyDigest Жыл бұрын

Here is a link for a settable Supco POP3 3 Amp Circuit Breaker, Push Button amzn.to/3BdtxyY

@JustPlumDucky Жыл бұрын

@@TaddyDigest Thx much for your reply! Because the Lil' Popper resettable breaker is about $20.00, I'm looking at one like you're showing in this video. It's 3A with the rocker switch (less than $10.00/free shipping/Prime. Does it need to have a low voltage rating, or are the ratings such as 125v/250v (whatever the exact numbers are) maximum ratings which is OK?

@TaddyDigest Жыл бұрын

If you find one send me the link because I want a cheaper 1 to recommend Whatever it says is whatever it is my friend

@charlesmalinoski6325 6 ай бұрын

Are you talking about the (NTE Electronics )R59-3A ? I have one.Love it. $7.20 No Problems... @@JustPlumDucky

@linnell6103 Жыл бұрын

I joined

@TaddyDigest Жыл бұрын

Awesome thanks for subscribing If you want to join click the join button Join this channel to get access to perks: kzfaq.info/love/uMyjTVlkM4xZ5z_eSyoB1wjoin Wanna Learn more about hvac? Check out my hvac tips for technicians playist. kzfaq.info/sun/PLVjetZt5xgenmO76adHwb2ctyeBIFKUus

@gilbertosalas2463 Жыл бұрын

Hey how are you ? I have a question and I want to know if you can help me? I have a short in the low voltage my fuse burns but even with the thermostat it is disconnected and it seems that it is the board one of the common lines has continuity with the red and I disconnected the common that goes to the board and I no longer had a short? How can I know if the board that is damaged

@TaddyDigest Жыл бұрын

Check out this video as well Troubleshooting Low Voltage Short HVAC Basics kzfaq.info/get/bejne/r9hpa6qeu9q1Z30.html

@TaddyDigest Жыл бұрын

take the board out see if it looks burnt see I it smells burnt

@Empty7775 Жыл бұрын

I currently have a low voltage intermittant short. Replaced the fuse and the heat pump will run in ac mode for about 24 hours before blowing the fuse again. Resistance on the heat pump contactor is about 17 ohms, I didn’t find any wires chafing outside. I’m wondering if the thermostat has an intermittent issue causing the fuse to pop?

@TaddyDigest Жыл бұрын

The thermostat can be the issue however I would take the thermostat off the wall and test the heating and cooling operation Without the thermostat and see if it pops

@Empty7775 Жыл бұрын

@@TaddyDigest ok. Ill try that tomorrow, ill be there at 10am est. thanks for the reply dude.

@TaddyDigest Жыл бұрын

You're welcome brother good luck

@Empty7775 Жыл бұрын

@@TaddyDigest found it.. in the AH, low voltage wiring is in a small metal box the size of a playing card with 2 screw’s holding the cover on. Checked every wire run, ohmed every coil, unplugged the rev valve ect, everything checked good. Had my popper in, then removed and put in a new fuse. The ah was running while putting on the cover to the control wiring, installed the bottom screw of the cover, then while installing the top screw, the fuse blew. The the stat wire was routed behind the box, as i installed that top screw, the threads of the screw were penetrating cutting the insulation of the stat wires (still in the brown insulation). Accidental find but ill take it.

@TaddyDigest Жыл бұрын

Awesome news brother glad you found the issue and you fixed it good deal

@WORDTOMICHAEL 11 ай бұрын

Michael from nc

@Cleansing_Fire Жыл бұрын

Equinox festival.. 🔥 ✌️ ☮️ 🕊 😂

@jacobsisk2188 2 ай бұрын

The inline fuse is on the hot not the common….

@jmeepping1396 Жыл бұрын

I'm not blowing my fuse or breaker and my home is only 3 years old and I have not thermostat power.

@opeyemialaka623 Жыл бұрын

I join

@opeyemialaka623 Жыл бұрын

Really good explanation Process of elimination

@TaddyDigest Жыл бұрын

Join this channel to get access to perks: kzfaq.info/love/uMyjTVlkM4xZ5z_eSyoB1wjoin Wanna Learn more about hvac? Check out my hvac tips for technicians playist. kzfaq.info/sun/PLVjetZt5xgenmO76adHwb2ctyeBIFKUus

@MTknives 2 жыл бұрын

Give it the beans and you will find that short. 😉 just throw in a 102 fuse and give er the juice. 😎

@TaddyDigest 2 жыл бұрын

hahaha lol 😆 Yes that is one way 😆 🤣

@SH-vg5ov Ай бұрын

It was hard to watch with so many interrupting ads (~6 to 7)

@TaddyDigest Ай бұрын

dang ads

@_GandalfTheGrey_ 2 жыл бұрын

Anyone ever said you look like Steven Crowder? 🤔

@TaddyDigest 2 жыл бұрын

No but that's pretty cool I've actually watched him before He has some interesting videos

@_GandalfTheGrey_ 2 жыл бұрын

@@TaddyDigest Yeah his change my mind videos are great

@TaddyDigest 2 жыл бұрын

Cool I will check it out thanks for sharing

@_GandalfTheGrey_ 2 жыл бұрын

@@TaddyDigest No worries. And thanks for the helpful videos

@ranakeen9884 9 ай бұрын

BUT WHERE EXACTLY is the fuse located???? Is it in the attic, outside where the compressor and fan is or is it hidden somewhere behind the thermostat!?????