How to tell if a AC Capacitor is Bad! Visual and Multimeter Testing!

These Videos are all part of our Training Series on HVACR Service, Installation, Preventative Maintenance, General Knowledge, and Tips. Please comment and ask for videos that you would like to see in the future! We come out with new videos every few days from my job sites, service calls, and the training shop! I hope you enjoy them and find them very beneficial! Supervision is needed by a licensed HVAC Tech before doing this as Experience and Apprenticeship garners Wisdom and Safety.

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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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[tylerfury]

I was about to pay a guy $150 to come diagnose thank you for the video! $25 fix and it’s running good as new

[NewMeridianINC]

Very helpful video in helping me determine if the capacitor on my air compressor was bad! Following these guidelines I was able to determine the faulty capacitor, ordered a new one, received it yesterday and installed last night. Air compressor is running like a champ again! Thanks for the help!! $11 capacitor save me $350 in replacing the compressor!

[ckm]

One of the best videos I've seen for some time, not just hvac related. Very concise and informative. Killin it!

[tww]

THANK YOU. GREAT INFO. GREAT VIDEO. WELL DONE.👍

[angelrenee]

This was so helpful in revealing that our capacitor did not need replacing. We ended up after a couple videos like this saving a lot of $$$ on a big costly repair by having a better idea what was wrong with our HVAC. It ended up being a blower motor. We are very grateful. Still a big repair but saved a ton. Thank you.

[MrPatrickcummings]

Thanks, this helped me diagnose and solve my problem.Very much appreciated.

[thinkertoo]

I've learned so much from you. I appreciate your videos. They are so informative. Blessings to you. !

[ronaldcach]

Simple and to the point. I will remember this, great lesson. THANKS FRIEND

[boorayin]

Do I have to disconnect/remove the capacitor to check it with my newly purchased multimeter, please? Thx for the video.

[fatboyswagg]

Great video because my A/C unit doesn’t come on at all as of right now . Can’t afford a professional so I’m looking for resources for myself. Thanks

[johnmitchell]

Excellent very clear Thanks for posting

[someusername]

Pro tip: just keep a spare capacitor on hand and if your AC isn't turning on...just swap it in. They're pretty cheap and an HVAC company going to rip you off to do it. Mine die every 6 years or so in the desert.

[Ojb_]

Can this diagnosis be done still on the unit with all wires attached as long as the fuse is pulled and it’s grounded out? Thx👊🏼

[devingauthier]

Nice video and helpful explanation of why a start cap could still be energized whereas a run cap likely wouldn't be

[caseyhartsock]

If I only want to remove / replace my AC condenser unit's run cap as preventative maintenance, is it "best practice" to discharge both the run and start caps or is the start cap isolated by the relay you mentioned? I will use a multimeter to be sure the run cap is at 0 volts after discharging tool is used. Just wondering if the start cap could somehow feed power back into the run cap during the time it takes to remove the mounting strap/bolt and wire connectors.

[jotu]

Your fast reply would be greatly appreciated. Generally speaking, what is your opinion of different capacitors and their countrys of origin (where it is made) and different brands? Is USA made worth the price based on value / length of service? Of USA Capacitors what is better an...
1) AmRad for $31. ish? or a Titan HD for $16 ish?

2) what are your thoughts on the chinese brand that is $7.50 ish.?

[MegaGuitman]

Thank you for this awesome video sure helped getting my ac up and running

[dennydeckerful]

How can you tell which is the common if the top is rusted? Mine went out last week after 24 years.

[lemiarty]

One thing that jumped out at me is a tech saying uF. The symbol µ is not the letter U, it is the Greek letter "mu" and the symbol µ is used for micro as opposed to m for milli (mm = millimeter, µm = micrometer) . The video is easy enough to follow, but if you're writing instructions you may want to understand and properly communicate the terminology on the equipment you're using.