how to bench check a central A/C blower motor

[eazykilat2]

Good video. You should be an instructor.

[brotherbartell]

You realy lay it out sir. Thanks.

[halo3odst75]

very good easy to understand thanks.

[jevianfe]

OH MY GOD, WHAT EXCELLENT FREE CLASS I JUST GOT!!!!!!!! THANKS 21FOOTXPRESS. WHEN ARE WE GETTING MORE VIDEOS????

[hoasis35]

Great video. Easy to follow. I have electrical knowledge but no knowledge of ac fan motors. This will definitely help my trouble shooting.

[KSdrifter]

Thanks for the good vid.

[swickerific]

Excellent video! Thanks.

[12345marcov]

the unit that i saw does not have acontactor its all on a pc board on the condencing unit how do i bypass that

[12345marcov]

how do i do a pump down on a 410a unit with a low pressure switch and a pc board. is there a way to bypass the lps with out haveing to recover the refrigerant?

[21footxpress]

@12345marcov Just hold the contactor down with a nutdriver. BE CAREFUL!!!!

[12345marcov]

@21footxpress but the unit does not have a contactor it has a pc board is a there a contactor on the pc board. ?

[oozbej]

exelent video bro. thanks

[vector00234]

Great video.

[inagod]

thank you helping the little guy.

[jefferybrown92]

thank you so much

[jefferybrown92]

Please help me, I got a 1/4 hp ao smith blower motor, there's 5 wires coming from it, there's a black, yellow, red, brown with a stripe and a solid brown. Please tell me wich of those wires do I hook to what, I don't even know wich is the hot wire. Can you break it down in simplest form thank you so much

[21footxpress]

@jefferybrown92 Its the same as the motor in the video. The only difference is yours has a yellow in place of the white wire.

[jacobusonian]

I wish I would have found this video yesterday. Excellant explanation. Simple and fully explained. Thanks a lot for taking the time to help those of us who need it. I hope you are rewarded with prosperity.

[21footxpress]

@jacobusonian thanks

[feredoun12031]

really good video tanks for explanation i wish you could post more like this clip

[cruz47144]

You are a very good instructor. Thanks for the video!

[sxr951]

i have 3 wires from my stator how to i test for short. westinghouse. ac motor, pool app, 3/4 ser. ab85. s# 317p 357 thx!! got green ,red, and yellow, from stator

[sxr951]

i have 3 wires from my stator how to i test for short. westinghouse. ac motor, pool app, 3/4 ser. ab85. s# 317p 357 thx!!

[7faces]

Great video.

[patchcords]

My capacitor is ok and the motor is all ok (I think).

It runs on all speeds except on low, (red)...it hums and I have to help it by turning the cage...then it starts? I've already change the 7.5 uF cap. ??? !!! Why is it so hard to start in low?

[TAXOPAREI]

fantastic explanation ! I'm refrigeration technician 12 years and first time i see such a so easy analysis, at HVAC school they never taught us how to measure blower motors, thank you so much , greetings from Greece.

[estrelladelnorte1308]

Really nice video , i would like to see more from you , very informative and easy to understand ,two thumbs way up!!!!!!

[Luna98Sol11]

great video.... very simple and easy to understand... thanks for taking your time to teach others....

[21footxpress]

@Luna98Sol11 Thank you. I get a lot of jerks making comments on here. Not many people think about the time that people take out of their lives to make,edit and post videos (for free) to educate others. When it took years for them to learn what they teach.

[gmg2979]

@21footxpress thanks so much! I have evrything hooked up, but my new motor has no white wire-it has yellow, black blue & red. I have my circuit board drawn where the wires from the other motor went. Blue went to HEAT, black went to COOL Red & yellow went to UNUSED & the white wire went to "N" which also has the white wire from the relay next to it. Any ideas? thanks so much!

[21footxpress]

@gmg2979 the yellow wire replaces the white wire

[sashiir]

This is good stuff. I used it to review. I had a motor that did not have exact same design as the one I took out. Diffrent hook up it was alarming. It taook awhile to fiqure out how to install based on what I knew.

[buckhvac100]

WHY , DO YOU HAVE SPEEDS COMING OFF THE COMMAN . WHEN SPEEDS ARE TAPS OFF THE RUN WINDINGS , DIAGRAM DOESNT SEEM VERY ACCURATE TO ME

[Rasec77]

Thanks, I've been at HVAC school for a month and some things just didn't make sense. Your videos are making everything click thanks again.

[tectalabyss]

Thank You for a very clear and informative video.I rated and subscribed.Thanks again. Tec

[ryanjheimer]

Great video gonna go check mine now cus I am having the same humming issue as kshwatch. Thanks a lot!

[PoutinePete]

Maybe you should consider teaching. Great video.

[tquibido]

Thank you so much...This is my favorite vid of all..i learn a lot from this bro..

[rufuss7970]

Thank you. This helped me confirm what I thought. Bad blower motor. I disconnected the wires before taking it out and checked it. White wire to black was bad. Replaced motor, and capacitor for good measure, and it works like a champ. Thanks for the video!! Bill

[elena04able]

thanks for the great video! i have been in the trade 8 yrs mainly install but due to tough economic times i am trying to become more versatile. i do have some experience, things i've picked up along the way but lack practice and therefore confidence. this was good though, straight forward and simple. thanks again!!

[bullcalf624]

Two years of trade school couldn't teach me what you did in under 7 mins.I don't understand why many good techs call the white wire the common wire when it is NOT.The true common winding is the speed taps.I hook all my motors up based on what I've learned from you-not my instructor.He just confused me.I haven't had one single problem yet.Your videos have helped my transition from school to the field a lot more painless than it could have been.Thanks a million.

[wwbabbitt]

This was very well done, I am impressed, one of the best videos on PSC motors I have seen, great job you teach very well by the way we repair motors of all kinds, if anyone has a question drop a note to repair at mearservice com

[wwbabbitt]

This was very well done, I am impressed, one of the best videos on PSC motors I have seen, great job you teach very well

[Gcarman50]

Super great video, can you post your cell number so your fans can call ya in case of problems on a service call. LOL

[overscore23]

Thanks, nice video.

[videoluv60]

Wished I had watched this great training video before I wired my new $150.00, 4 speed 1/2 hp Emerson motor on my Intertherm gas heating a/c unit.

Fried mine by wiring to a direct short.

Don't know what I was doing wrong.

Really great video for beginners.

Thank's

[thisisnotyours1]

The connection from R to S and there's a Capacitor in between them, is that particular circuit (R to S) opens after the motor runs? I understand the Capacitor is to help kick start at start up. You said it's a single speed motor earlier but I just wanted to make sure because I am planing to buy a motor and test it myself. I appreciate your video it is very informative. Thank you very much.

[Z71Ranger]

Very good video!!! Thanks

[grego10r]

very helpfull vid thanks 

[joutfitters]

My motor will run just real slow, almost sounds like it's lopsided, capicitor is good. .... just runs slow.... motor not more than a year old. air did freeze up causing water under blower .... but no spark or smells. any ideas?

[JohnnyX50]

Thx for sharing! Iv always wondered why so many wires and what they all did !! Very informative, and apreciated! =]

[14KJEWELRYREPAIR]

I bench tested blower motor as suggested. it calculates well. I omhed out black lead to motor shell, got continuity after pulling motor from unit. originally blower motor did not come on during call for cooling or fan/on. I jumped R to G, still fan did not come on. Please Advice!

[ZED74]

Really good explanation , thankyou .. I have an air conditioner motor and board to test out .. This helps alot !!!

[IkeRay]

when would one use the different speeds (since it sounds like you connect only the one speed to the whole system)? how difficult would it be to install a secondary switch to control low and high speeds?

[kshwatch]

My motor at times does not take start & makes humming noise. Everything looks ok in the winding except, as per your diagram resistance between white and brown+white of capacitor should be zero. But my motor shows 5 ohms between these 2 wires. What do you think could be the problem?

[21footxpress]

is the capacitor good?

[kshwatch]

Yes, capacitor is ok.

I can not spin the blower wheel when motor is energized. Bearing is not ceased as blower moves freely when motor is not energized.

This does not happen all the time. When I hear a humming noise I switch off the power. After a few hours at rest it works fine at next start.

[21footxpress]

Replace it. The motor has a spot where the rotor is touching the stator. I run into that problem alot. Good luck!

[kshwatch]

Thanks very much.

[BryanRagon]

@21footxpress So, if the capacitor checks out at the required uF (in my case 5 uF) by using my multimeter. And I get correct "summations" between all the wires on my motor. And still the motor won't run when voltage is applied, you believe the motor is still at fault? What does it mean for rotor touching the stator?

Thanks!

[dynamicdyna]

@21footxpress ,what is the highest resistance running and low or starting and low

[garcon98]

excelent video sir, would you show one video on wiring the thermostats and air handler going to the condensing unit, i was a student back in thedays and still learning everyday thanks to you ,,,

[ab9957]

good explanation but 86 ohms on the start winding? that seems quite high...

[cameron030362]

Whichever speed you choose, that lead connects to the common post of the fan relay....the white wire connects to one side of power....the other side of power connects to the "normally open" post on the relay....when the relay is energized, the fan comes on....if using in a heat pump application, the "normally closed" post on the relay connects to the sequencer....that connection is called the "life-line" and allows the fan to run for a short time once the heat strip is de-energized....

[jaykaypplz]

L2(NEUTRAL) DOESNT GO TO COMMON?

[jaykaypplz]

L1(HOT) IS NOT SUPPOSED TO GO TO RUN?

[txmanzilla]

Great video!!!!! thanx

[e28chan]

One of the best explanations of how to test a motor. Thanks.

[21footxpress]

Thanks. This is proving to be the most popular video.

[usshepburn1]

@21footxpress excellent video!!!! Keep it up.

[strohsdrinker]

i'm taking rhvac for an associates degree, my instructor showed us this video. very well done!

[21footxpress]

Man I am glad to hear that. Good luck in school and your future.

[rgprojectwecare]

You are a gifted instructor! Your teaching method is clear and concise-well done. I'm looking forward to seeing additional hvac videos.

[21footxpress]

Thanks

[damrak1969]

Nice video. How about a video explaining the heating cycle in an electric heat pump unit with auxillary heat (heat sequencers, etc). You are really good at explanations.

[Avason1]

Excellent video.. I need to adjust my speed on my blower...should I use the jumper or make sure i have the black connected? Thanks

[KennethMixson]

Thank You, Sir. That explains it in simple terms.

[tazzjr74]

you are very good at explaining hvac thanks for the vids i too am trying to learn as much as i can so i can run my one man service company in a future

[21footxpress]

Good luck!! Arm yourself with as much knowledge as possible.

[keithherr]

Great videos my friend! some of the BEST!

thank you for your time.

what state are you in?

[21footxpress]

Im in louisina. Thanks

[tigercub19hp]

good job i have a whole blower out of a furnace im going to use in the garage to cool down it moves alot of air and its quiet

im going put a plug end on and i didnt know which to use thanks man

[21footxpress]

Check the amp rating and compare it to the amp draw of the motor. When they are removed from the furnace the amp draw is going to go up. You are going to need to block off one side of the blower.

[koppimasho]

Nice job! This is the first time I really understand how an HVAC motor is wired up.

[21footxpress]

Glad to help.

[yourtotal]

Excellent! You must have been in the military.

[21footxpress]

Thanks man.

[21footxpress]

The best?? WOW!! Thanks

[tyrone1474]

can you do something on variable speed motors, with modules.

[str8chilling3000]

excellent video

[gambitsmooth]

great video champ i understand the schedule i had was horrible for work i worked hvac for 2 years

[ccharlie225]

Thanks a million sir.

[21footxpress]

You are welcome a million sir.

[shragakrigel]

Thank you so much, learned alot from your tutorial.

you must continue and post more video

shraga

[maxwellhouse45]

Been going to school for 20 years on and off. First time I've heard it explained like this. Excellent. I'll be checking your other videos.

[snoopy9134]

I'm thinking of going back to school for HVAC. I've been checking youtube vids just to see what this profession is about.

Your videos are very well made, and interesting. Thanks so much. :)

[playone4me]

Excellent job thanks for explaining in such a easy way to learn.

[hknice57]

God bless you.

[21footxpress]

He has. Thanks

[fs1]

Great job explaining....Like your teaching style, wish my Instructors would explain so thoroughly

[thabomoyo]

I wander what company you work for they must love your great work "very Knowledgeable"

[21footxpress]

Well I left a company two years ago. I am a full time instructor and run a one man service company.

[moe4235]

Great piece of work!! Thanks for the time you took to get this done...

[21footxpress]

Thank you. Most people dont understand that its hard to work ,raise a family and find time to make these videos. I will post more in the future.

[hilarycutter]

He's a genius instructor.

[21footxpress]

WOW!!! Thanks

[andacagap]

keep whith this kaind of videos they realy teach thankyou amigo

[leshoffman1]

Man I've never heard anyone explain a motor operation in such simple terms most guys want to use all this fancy BS to show everyone how smart they are THANX

[21footxpress]

Thats the point of my videos. Explain things as best as i can, yet keep it simple. Take care.

[herbstash420]

Thanks a whole lot. This video is extremely informative.. good job man

[johnnyrotten52]

This is a really great tutorial. You do have a gift for teaching! Thanks 21footexpress!!

[21footxpress]

If it is a gift I am passing it on to you. Thanks.

[21footxpress]

RESPONSIBILITY???????

[dalelew]

Great job, very informative. One question, how do you know what ohm readings are bad or indicate a motor that will not run. Are their ohm specs published anywhere? Would 50 ohms be good?

[armyace06]

any ohm reading is good if you get open line or infinity reading that no good ...make sure to ohm out every winding b4 condembing a motor and also check run or start capacitor.....

[21footxpress]

Thanks arnmy. Let me also point out that the ohm readings should all add up. black to brown plus black to white should equal white to brown.

[launews]

just a question, which side goes to the neutral which goes to the hot from the line. like the blue wire,which wire from the powwer goes to that? is it the black or white?

[the1spen]

That was cool, i want to learn more about wireing and you made it easy to understand.

[elmodelo809]

really nice. im a hvac student and i learn alot from your videos. great job

[destitoo]

Destitoo

Now that was good! More, more, more.

Thank you

[onthevermont]

nice,well explained!post more?

[M3MPH1SM0J0]

how does it detect anything when its not wired to any electricals?

[ZZ327]

hes not reading voltage, he is reading ohms or Continuity to see if the windings are good

BTW Im in hvac and you are a damn good teacher 21footxpress

[21footxpress]

Thanks

[cashgiftgiving]

You do a top notch job explaining. If you ever do one on reading diagrams on appliances, please let me know.

Jack Lowe

[rlewis1946]

Great Video! Clear, concise and the diagram as you proceded really gave excellent support to your actions and voice over. Well Done!!

RL Atlanta, GA

[21footxpress]

Thanks!!

[bobbyton80]

Excellent training video. One quick question though in regards to the motor speeds. Is it always black high, blue medium and red low speed?

[skybroodz]

Hi, first of all, I really love your video. I would like to check with you whether your diagram is applicable with fan coil unit's (indoor unit) fan motor?????

[jsemelgar]

Man! This is the best & easiest to understand explanation that I have seen. I will make notes and save them. How about checking R22 levels? Thanks a whole lot man! You are a very good teacher.

Jim

[ka7cev]

Well done. Thank you.

[old64goat]

This is a great video, you do a good job explaining how it works.

I should follow your example in my videos.

I am weak on motors with more than 2 wires.

I know white is neautral and black is hot, but the red I always thought would go to the other leg of a 220 volt line.

I would have thought that motor was a 220 volt motor.

I would have blown it out!.

I learned something today.

Thanks for posting.

Bill

[usererrname]

Your a good teacher! Thanks for your help.