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been meaning to order a spare A/C capacitor all summer

Posted on 8/18/23 at 9:43 pm
Posted by jlsufan
Baton Rouge
Member since May 2021
262 posts
Posted on 8/18/23 at 9:43 pm
finally got around to it last weekend...it arrived yesterday...the one on my unit went bad today...15 minutes later I was back in business...guess I'm living right

thanks for all the folks who suggested it
This post was edited on 8/18/23 at 9:44 pm
Posted by calcotron
Member since Nov 2007
8265 posts
Posted on 8/18/23 at 10:05 pm to
Nothing is more satisfying than when it starts working, whether a capacitor for AC in the summer or clearing out that pesky pressure sensor for the exhaust fan on the heater in the winter.
Posted by meeple
Carcassonne
Member since May 2011
9372 posts
Posted on 8/18/23 at 10:18 pm to
Did you follow a specific video on how to change it? I have a spare but I don’t want to electrocute myself if mine goes out.
Posted by bapple
Capital City
Member since Oct 2010
11891 posts
Posted on 8/18/23 at 10:44 pm to
quote:

Did you follow a specific video on how to change it? I have a spare but I don’t want to electrocute myself if mine goes out.


If you have any basic tool skills you can do it. The most important part is to pull the disconnect at the unit and then discharge the capacitor. This video is pretty good at showing the steps:

LINK

Posted by TulaneLSU
Member since Aug 2003
Member since Dec 2007
13298 posts
Posted on 8/19/23 at 7:04 am to
Friend,

I am not the handiest person in the world when it comes to electronics, but I have changed many AC capacitors. It is very easy to do and should take less than ten minutes. Once you do it, doing it a second time will take three minutes. Capacitors run $15-$25. AC repairmen will usually charge $250-300 to replace it.

Yours,
TulaneLSU
Posted by LEASTBAY
Member since Aug 2007
14290 posts
Posted on 8/19/23 at 8:13 am to
Better than hitting the lottery.
Posted by Bayoubengal85
Kenner
Member since Sep 2005
299 posts
Posted on 8/19/23 at 8:13 am to
Now order another to have a back up.
Posted by jlsufan
Baton Rouge
Member since May 2021
262 posts
Posted on 8/19/23 at 8:15 am to
yup...already on order ;-)
Posted by LordSnow
Your Mom's House
Member since May 2011
5509 posts
Posted on 8/19/23 at 8:26 am to
How did you know what cap to order?
Posted by jlsufan
Baton Rouge
Member since May 2021
262 posts
Posted on 8/19/23 at 8:52 am to
if you know or can find you unit's model number you can likely look it up on the internet, but it's easy to just remove the cover on the unit and see what is currently in it

you are looking for the capacitance value on your capacitor's label...it's a number followed by either MFD or uF (for microfarads)...some have 2 capacitors internally, one is the capacitor for the compressor and the other is the capacitor for the fan, so they'll list 2 numbers...mine was a 40/5 MFD meaning it has a 40 MFD and 5 MFD capacitor bundled together internally and so has 3 terminals

you also want to match the max rated AC voltage that yours lists...in the picture below this one was rated for 370 or 440 VAC...as long as the replacement meets or exceeds this max VAC you are good



This post was edited on 8/19/23 at 8:55 am
Posted by EF Hutton
Member since Jan 2018
2366 posts
Posted on 8/19/23 at 10:14 am to
Call the AC guy. He has to eat too
Posted by jlsufan
Baton Rouge
Member since May 2021
262 posts
Posted on 8/19/23 at 10:51 am to
so do I
Posted by DVinBR
Member since Jan 2013
12984 posts
Posted on 8/19/23 at 10:52 am to
im really curious about how the unit is going to react if the capacitor goes bad while having a soft starter on it, will the soft starter detect it and not start the compressor? the thing is the soft starter actually has a starting capacitor in it that temporarily goes in parallel with the main capacitor while the TRIAC ramps the current on the run winding, will it still be able to start the compressor?
Posted by Shanegolang
Denham Springs, La
Member since Sep 2015
3453 posts
Posted on 8/19/23 at 3:52 pm to
The hardest part is dealing with the wasps that are nesting in the breaker box and area where the capacitor is.
Posted by TigerAllNightLong
Member since Jul 2023
280 posts
Posted on 8/19/23 at 4:20 pm to
quote:

Now order another to have a back up.


I’ve got 3 on the shelf. Also spare fan motor, contactor, another cap for blower fan along with a spare transformer.

And all that for less than one service call.
Posted by DownshiftAndFloorIt
Here
Member since Jan 2011
66763 posts
Posted on 8/20/23 at 10:00 pm to
quote:

Call the AC guy. He has to eat too


I'm going to DIY my whole system, ducts and all this spring time and post a play by play just to piss you off.
Posted by Chingon Ag
Member since Nov 2018
2800 posts
Posted on 8/20/23 at 10:39 pm to
Not this again. AC guy is fat and happy this summer.
Posted by chryso
Baton Rouge
Member since Jul 2008
11867 posts
Posted on 8/21/23 at 9:45 am to
How do you know that the capacitor is the problem?
Posted by AlxTgr
Kyre Banorg
Member since Oct 2003
81631 posts
Posted on 8/21/23 at 9:48 am to
quote:

The hardest part is dealing with the wasps that are nesting in the breaker box and area where the capacitor is.


Had to have a guy come out earlier this summer for a capacitor(I did not know that was the issue) and he found three nests.
Posted by man in the stadium
Member since Aug 2006
1399 posts
Posted on 8/21/23 at 9:52 am to
To those who have often changed them on their own: do you find a marked difference in the made in USA vs made overseas brands of capacitor (aside from the ideological aspects from buying American)?
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