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How to find correct size spare capacitor for HVAC?

Posted on 8/17/21 at 3:38 pm
Posted by boudinman
Member since Nov 2019
5129 posts
Posted on 8/17/21 at 3:38 pm
Unit is a Smart Comfort by Carrier. Model R4A542GKB100. Manufactured June 2020.

I've seen others here say have a spare capacitor on-hand by AMRAD. I can't seem to locate one by using the model number. Thanks in advance for help with my dilemma.
Posted by Alleman
St. George
Member since Apr 2013
741 posts
Posted on 8/17/21 at 3:41 pm to
I removed the access panel on my AC compressor and matched the numbers on the capacitor currently installed. I'm not confident in my ability to read the schematic for my AC.
This post was edited on 8/17/21 at 3:44 pm
Posted by dukesilver72
Texas
Member since Feb 2015
919 posts
Posted on 8/17/21 at 4:01 pm to
Match the number on the current one... Should look like 35/5
or 40/5 type number.
Posted by Hamma1122
Member since Sep 2016
19862 posts
Posted on 8/17/21 at 6:44 pm to
Go open the panel
Posted by 4WHLN
Drinking at the Cottage Inn
Member since Mar 2013
7582 posts
Posted on 8/19/21 at 11:08 am to
PRO TIP:

Make sure you watch a video or two BEFORE you change out said capacitor. Capacitors keep a lot of voltage stored even when the unit is off. You can shock/kill yourself if its not properly discharged.
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