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Old 05-28-2011, 01:46 PM   #1
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Replacing carrier air conditioner capacitor

I have a 2007 Damon Daybreak with the Carrier air V standard 99-00468-00 ducted air conditioners. The Capacitor in the bedroom one died. I thought it would be an easy fix. Go up pop the cover off take out the old one get the #s off it and find a replacement. Now I havent been able to match one up. The numbers on the capacitor are: 12/40 uf SH capacitor +-5% 370v-50/60Hz c22.2 No 190 LR 79596. This is a dual run/start capacitor. The 12/40uf is what is giving me the difficulty. Also the 370v are being phased out and the 440v are replacing them. Has anyone replaced theses capacitors and what am I doing wrong in looking for them?
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Old 05-29-2011, 05:38 AM   #2
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The Manuel for you unit appears to be www.transportaircon.carrier.com/Files/Bus/Local/US-en/T298.pdf
You might want to think about switching to a hard start capacitor as a mod and because it may be easier to find. RV Air Conditioner Hard Start Capacitor | ModMyRV
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Old 05-29-2011, 06:02 AM   #3
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You may have to buy OEM on this size capacitor (It is not one of the common sizes) or you can use two capacitors for the same purpose; a 12 uf and a 40 uf. A 440 volt capacity will work fine in place of a 330 volt capacity.
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Old 05-29-2011, 09:57 AM   #4
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Thanks for your help, now I am considering the hard start capacitor. So if I were to do that what uf do I need for the run capacitor?
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Old 05-30-2011, 05:29 AM   #5
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The 12/40 uf capacitor is the run capacitor for the compressor and fan motor. Test the capacitors first. If they are bad; replace. If not, find out what is wrong rather than just try throwing parts at it. If you find the compressor start capacitor and or PTCR is bad let me know and I can guide you to a universal hard start.
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Old 08-03-2011, 03:47 PM   #6
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Follow up. After unsuccesfully searching for Carrier replacement parts I drove to CW. They replaced the air conditioner under my extended warranty. I did however keep the old carrier they took off since I still have one as the front AC.
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Old 08-03-2011, 09:03 PM   #7
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Start caps and run caps are 2 different items you have to have a run cap
start caps are only need if it is locked up or having trouble starting the volts just needs to be higher 370 or 440 is fine the mfd has to be the same or you can use 2 caps to make 1for the comp and 1 foe the fan that is a odd size
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Old 08-04-2011, 11:27 AM   #8
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That unit is actually TWO capacitors in one can (Fairly common)

If you go to a motor shop they should be able to find, if not the actual replacement, two seperate units that will do the job. you will need to run one jumper wire (The white one)

Google; electric motor service
Or : Electric Motor Repair

To find a shop.. i did that when the motor (not the capacitor) failed on my Carrier Air V 2 weeks ago.. Carrier no longer sells parts for them (Minor federal violation there I think) but he found one that, if anything, is better.

The 12 mf one is for the blower by the way.

As for the 330/440 volt.. Don't worry about that..

A 440 volt rated cap can replace a 330, the reverse is not true.

If you are near Flint or St. Clair Mi contact me and I may have more info.

in fact I have the exact capacitor, though I'd need a Single to replace it (I'd need the condensor side, the larger of the two values) as my new blower motor only uses a 5mmf.

I have a question for the experts.

Anyone know the value of a "Soft start" v/s a "Regular Start" .. I'd like to know.
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Old 08-05-2011, 03:12 AM   #9
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Quote:
Originally Posted by wa8yxm View Post

Anyone know the value of a "Soft start" v/s a "Regular Start" .. I'd like to know.
I think the only difference is wording; soft or regular start verses hard start.
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Old 05-09-2015, 08:46 AM   #10
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I've got a Carrier V - I wanted to add on to this thread for the other Carrier Air V owners that may have capacitor troubles. In my particular case, the compressor was fine, but the fan wasn't spinning up..

The Capacitor in my RV was:
12 / 45 UF 370V
No 190
LR 79596
DAL-M3GJ1245
Digital Tech


I've read that carrier AIR V came with 45/12 and 45/10, or maybe that's just what they're getting replaced with these days. The 45/10 is perhaps a little light on the fan side. Replacing with individual capacitors may be challenging due to space concerns.

This Capacitor is very difficult to find.. That's to say, I couldn't locate one in 45/12.



The nearest single capacitor I found was 45/10, which ranges from about $16-$32:
http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
PN R-43-26261-48

Others that will work in 45/10:
http://www.amazon.com/Fasco-C3D4510-...XSR7KJWCJ9V012
Fasco C3D4510 Proline


http://www.amazon.com/43-26261-48-Rh...90APVNTYRZ5MQK
43-26261-48 -Rheem OEM Round Replacement Dual Run Capacitor 45 + 10 UF
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Old 06-16-2017, 12:09 PM   #11
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Found a Cap that works

I spend hours hunting this down for a friend a G.E 27L552 is a 12.5/40 Mf cap and the size is close. Just want to share
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Old 03-22-2018, 10:44 PM   #12
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Ancient Thread I know, but the same thing has finally happened to our Carrier Air V. So they are still out there and kicking . Our unit has a basement AC which is what we primarily use, so my guess is the rooftop unit got little use.

Looking to get a 45/10, heres hoping thats the problem!
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