Most techs use a screwdriver but I show a way to make a capacitor discharge tool to satisfy the most nerdy or safety conscious tech.
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All right, so first thing we need to do is discharge this capacitor now there's what everyone says that you should do. Who knows what they're talking about designed these things and there's what most technicians do most technicians will we'll just touch between the terminals on the capacitor, with a needlenose pliers or with a screwdriver? This is a screwdriver that I've adapted with a twenty thousand ohm resistor five watt, twenty thousand ohm five watt resistor - and you can see here. This tip - is one side of the resistor, and this alligator clip is the other side of the resistor. So, in order to do things the technically correct way, that's the right way to do it do most techs in the field.

Do that no, they don't have. I always done this. My career, no, I haven't, but this is the technically correct way now, even when you're working with this, though, because you got an alligator clip, you still have to be careful. In most cases, the capacitor will be discharged because it's allowed to discharge through the windings of the compressor, but there are some rare circumstances where it may still hold a charge.

So all you would do is you would just take the one side and you would wire it to the common terminal which is right here and then you would touch the hold on say it again. You take the one side and you connect it to the common terminal which - and this is kind of an awkward location, so I'm actually going to just connect this at the on the home side first and then I'm going to touch this over to common. That way, you know we're fully discharged and then I'm going to take this side, look at the common and then go to the fan side. So we know the fan is fully discharged again, most guys would just take a screwdriver and jam it in there.

You could potentially get a pretty big.

35 thoughts on “How do you discharge a capacitor?”
  1. Avataaar/Circle Created with python_avatars Hola! James Whiteley says:

    You can't see the terminals well enough in this video. Hope nobody died watching this Are you in Nepean ?

  2. Avataaar/Circle Created with python_avatars Javier Rivera says:

    I am amazed about how this guy ignores completely the elephant in the room… The obvious lizard LOL.

  3. Avataaar/Circle Created with python_avatars Gavin Lynas says:

    Looks like the gecko already discharged it for you. Are you in Orleans ?

  4. Avataaar/Circle Created with python_avatars Chris Watts says:

    Can you discharge while still hooked to the unit?
    I did and got sparks is that bad?
    Or did I damage my home air conditioning unit ??

  5. Avataaar/Circle Created with python_avatars Chief Louie says:

    Now I know why it cost hundreds to replace $10 capacitor. It's life or death.

  6. Avataaar/Circle Created with python_avatars QTS Quality Technical Services says:

    Does it work if I use the metal from the AC and touch with the screwdriver both one by one the connectors from the cap ? Service area Ottawa??

  7. Avataaar/Circle Created with python_avatars ospuddy says:

    The way I discharge a capacitor is to grab a gecko and short the gecko over the terminals.

  8. Avataaar/Circle Created with python_avatars James Tello says:

    Did that lizard discharge it before hand?

  9. Avataaar/Circle Created with python_avatars iAm Marauder says:

    My aircon compressor takes a long time to start, like 10-20mins or so.. and when it stops it takes too long again for it to engage..does that sound a bad capacitor?

  10. Avataaar/Circle Created with python_avatars xsietube says:

    Lizard leg galvanoscope?

  11. Avataaar/Circle Created with python_avatars RubLar 75 says:

    HVAC techs always have been and still are exposed to electrical hazards yet never implement electrical shock &/or arc flash PPE when the work.

    Be safe HVAC techs! You can die from electrocution just like an electrician can. Are you in Kanata ?

  12. Avataaar/Circle Created with python_avatars Ron W. says:

    First step is to remove the dead animal.

  13. Avataaar/Circle Created with python_avatars Bernard Changtyseng says:

    Looks like the gecko did the job better.

  14. Avataaar/Circle Created with python_avatars timmyt1232 says:

    Is that the gecko from Geico? I hope he had insurance.

  15. Avataaar/Circle Created with python_avatars ramstopgun says:

    You’ll fix it only though my dead body !

  16. Avataaar/Circle Created with python_avatars Britton Evans says:

    that lizard must of had a pacemaker. I'm so bummed…

  17. Avataaar/Circle Created with python_avatars Ozzy Moore says:

    Love that fried lizard as a warning lol

  18. Avataaar/Circle Created with python_avatars Matt says:

    What's the worst that could happen by using the "other" method (screwdriver)?

  19. Avataaar/Circle Created with python_avatars Diego Hernández says:

    Sometimes, I use a incandescent lamp, and after I use only the screwdriver

  20. Avataaar/Circle Created with python_avatars Norri Buvari says:

    let's all spare a moment for the fried gecko <3 rip

  21. Avataaar/Circle Created with python_avatars Xaver Bishop says:

    Lizard discharged.

  22. Avataaar/Circle Created with python_avatars Chuck Ger says:

    I hate when u tubers put up little windows for links to their other videos BLOCKING what they are showing in the current video, Thumbs own

  23. Avataaar/Circle Created with python_avatars MajorMomentMedia says:

    This is done on the one being replaced or the new install or both ? Service area Barrhaven??

  24. Avataaar/Circle Created with python_avatars Stouthuyzen Bob says:

    i slam it with a hammer lol

  25. Avataaar/Circle Created with python_avatars Eric Ballard says:

    I usually touch it to my co workers legs to see if its hot. Waaaay more fun

  26. Avataaar/Circle Created with python_avatars Mike Cummings says:

    why didn't you verify the discharge with a volt meter?

  27. Avataaar/Circle Created with python_avatars MrJoey1570 says:

    A capacitor on a washing machine motor will light you up every time, no where for that current to go,I do apt maintenance and work on all the HVAC and appliances

  28. Avataaar/Circle Created with python_avatars G P says:

    😆 I heard nothing you said while paying attention to that corpse lying on top of that capacitor. 🤣

  29. Avataaar/Circle Created with python_avatars Tallen says:

    Those dam gekos

  30. Avataaar/Circle Created with python_avatars Larry Cole says:

    I have always used my volt meter and I have always taught it that way.

  31. Avataaar/Circle Created with python_avatars Todd Medium Wellington III says:

    is this method for all capacitors or is there a different method for certain capacitors?

  32. Avataaar/Circle Created with python_avatars mike smith says:

    LOL get rid of that dead lizard. Service area Kanata??

  33. Avataaar/Circle Created with python_avatars David Sooklal says:

    I always use my multi meter. Isn't that the right way?

  34. Avataaar/Circle Created with python_avatars Rich says:

    I thought the discharging happened after you removed it completely from the wire connection? That did not look safe 👀

  35. Avataaar/Circle Created with python_avatars Chuck DeArruda says:

    Most volt meters should provide more than 20,000 Ohms of impedance. Is there any reason you/we should not allow discharge through a voltmeter?

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