Air Handler Not Working! Diagnosing an Electrical Power Problem!

[@hvacservicementor]

Love that you used one meter to measure voltage and another to measure amps simultaneously. I always recommend that techs have at least two meters at all times!

[@acservicetechchannel]

Good call!

[@HCheatNcool]

This type of stuff helps me out more than anything as a new technician. Helping me think about weird things that could happen and beat in my head the operating principles of the unit and the electricity

[@bill944]

Sound information here! Isolation of components and equipment is essential in many cases for proper troubleshooting. Nicely done. This particular problem is also missed when technicians are checking voltage at a single pole contactor. The voltage will backfeed through the unit. Between ground and each leg of power you'll get 120V but if you measure between each incoming leg at the contactor you get 0V.

[@MrChipBryant]

Very good information. Thank you for your many contributions to our industry!

[@acservicetechchannel]

Thanks for watching!

[@andresbarragan8595]

FROM CHICAGO EXELENT VIDEO THANK YOU SO MUCH

[@jameswasher3938]

Just wondering where that white wire turned red. Did you find the white wire in the air handlers disconnect?

[@LRBennettInc]

Using red electrical tape wrapped on the white wire is a designation of power and should always be done regardless of the obvious 2 pole breaker. But i do like your observation of increasing that breaker if the wire is correct. The panel breaker does tend to be the issue on most of our voltage issues to the unit but rarely when it's oversized correctly and can only be done when you have a fused disconnect or breaker at the AH. AH breaker is the important one. The OHM to ground is good stuff. Thanks for the video these really help passing around good information.

[@deanmartin1966]

Great info thanks for sharing your knowledge

[@acservicetechchannel]

Glad it was helpful!

[@kingjames7929]

I'm having a same issue but I do have 120 to each leg to ground. So I'm confused at this point, can you help me out?

[@Eddy63]

Great info Craig ...

[@acservicetechchannel]

Glad you enjoyed it

[@michaelchiang6595]

I appreciate you and your videos. So helpful. I’ve been out of the treads for a while and I’ve been looking for a way to refresh my memory and I have to tell ya that your videos are perfect. Thanks you so much.

[@acservicetechchannel]

That is really awesome to hear Michael!

[@CoolerQ]

It would be really interesting to see the inside of the failed breaker if you still have it. Or send it to someone like bigclive to tear down.

[@morganexoticmastiffllc1403]

Thanks 🙏🏾 needed to know that. I will like an share!!!

[@Ted_E_Bear]

Information is great. !!

[@acservicetechchannel]

Glad you think so!

[@BagelBoard]

I love your videos. My problem is that my air handler goes on, but then shuts off after 5-10 mins. Then it comes on again but shuts off again. What do you think is the issue ?

[@jerrygolden1757]

What type of breaker is that in that unit? I have been looking for some like that, but havent found any yet. where can i order some?

[@oscarcastellanos9270]

Where do I get a replacement breaker since mine went bad? Mine is identical to the one on this video but Lowes and Home Depot don't seem to carry it?

[@DavidHernandez-gt9bo]

Good videos !!! Great troubleshooting skills .

[@acservicetechchannel]

Glad you enjoyed it

[@AlbertHariaz-np8uk]

What kind of cable can I use for an air controller without a control board?

[@rolandovargas5149]

4:12 the white wire has to be marked with a black or red mark to identify it as a hot wire el cable blanco tiene que marcarse con una marca negra o rojo para identificarlo como un alambre calient

[@edypanama7221]

Thank you Good video 👍

[@acservicetechchannel]

Glad you enjoyed it

[@zekenzy6486]

Great Video. Have A nice Weekend. Thank you for sharing ^_^

[@acservicetechchannel]

Thank you! You too!

[@MiguelPerez-jf3tf]

I have a question on how do I add a heat pump to the system , removing the heat strip because its not heating enough for the client and were happier when they had a heat pump before

[@tristanwilson2560]

Have you had a problem with having 120v on both legs to ground but when you measure from L1 to L2 you only get around 50v? It’s stumping me

[@Achabab]

great jobs 👍

[@acservicetechchannel]

Thanks for the visit

[@800blake]

Had a similar problem recently was at a job with a leg out coming into the condenser disconnect and something that had me scratching my head, on the leg with 120 across the line and load side of the open disconnect I was only getting a bit over half the voltage drop of like 75 volts but the output side still had 0 volts to ground like I'd expect with a full voltage drop super weird.

[@dalebrenchley3311]

So confused. My handler worked perfectly and suddenly won’t power on. My dog knocked the drain pipe that includes the shut-off float next to it. The float wire may have got tugged. I’ve turned breakers on n off and same with outside unit. Any ideas spring to mind?

[@CHOMAHOMA]

Thank you for your video. I appreciate it. One question, what do you think is the best way to study the sequence of operation of a particular unit?

[@bill944]

I've found that the manufacturers' installation manual is best. This will eliminate, what are typically minor, differences between different manufacturers and different models and will inform you of jumper or dip switch settings that can change the operational characteristics of the equipment. Also, important to know what thermostat is being used and the specific installer settings that have been programmed such as "comfort" settings vs. "normal" settings.

[@CHOMAHOMA]

@@bill944 Thank you.

[@rosscourtney9913]

It can be red or black in my area. I can't remember but I believe their may be a third color also it can be. Obviously talking about the power wire color but nice vid!!! I've ran into the same issue with an od unit but was something in the disconnect ultimately if I remember right.

[@grecomsiri1532]

Beautiful

[@acservicetechchannel]

Thank you

[@donnierobertson3088]

Nice video

[@acservicetechchannel]

Very nice

[@brianb5779]

Thanks for the info, def learned something.

[@acservicetechchannel]

Glad it was helpful!

[@ericgateway]

can you please help the way forward. Machine came on correctly. but the only problem is not blowing the bottle

[@clevc112]

Could the homeowners replace their own breaker to save money on an electrician if they know It's the issue? I replace mine and I'm not a licensed electrician.

[@OcRefrig]

Good video ! in California we are allowed to install a Breaker and pull power to our Hvacr equiptment. To everyone else Check Your state for Local Laws. White Wires in an electrical panel should NEVER be used as a Power Wire attached to a breaker. White wires should only be used as a Neutral wire & should ONLY BE attached to a Neutral bar. Green wires Should ONLY be used as Ground wires. Colored wires are used for Power & attached to breakers. Follow these rules and everyone WILL be a lot safer.

[@michaelcostello6991]

Thanks

[@anthonylumar5984]

Wat if it's a terminal block? I read 240v coming to the unit but not through the terminal. 🤷🏾‍♂️

[@jeffreyhill3960]

Some ware in the feed circuit the wire goes from white to red, obviously a splice somewhere….hmmmmm.

[@ericgateway]

I have a problem. the bottle is not blowing

[@fredrejouis3018]

Well I have a issue air handler fuse keep blown up on me

[@Bluecollarrebel]

🔥🔥🔥🔥🔥

[@1martinontherocks]

thats stupid not to allowed an hvac guy to change a breaker, ill change the whole panel if i have to.

[@OcRefrig]

in California we are allowed to install a Breaker and pull power to our Hvacr equiptment. Check Your state for Local Laws.

[@Froggability]

An hvac tech who isn't a licensed electrician? I feel sorry for these guys unable to do the whole job

[@clevc112]

@James Kepley you should become a doctor too in case someone gets hurt where you are working.

[@rickychavez1473]

👍👍👍

[@eliezerrivera8764]

Well the guy with the meter at the main braker doesn't have at list gloves on his hands for protection

[@adamcraig1568]

No one cares

[@ericgateway]

it's a brane new machine

[@scottieholland6486]

So if no amps are coming on when breaker is on does that mean it's bad?