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Home HVAC caps #5451213 06/11/20 09:49 AM
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1978elcamino Offline OP
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seems about every year a capacitor is replaced under warranty on the oustide units. One year its the run cap the next its the starting cap, unit 1 one year unit 2 the next year. I just want to replace all 4 at the same time with GOOD QUALITY units that will last longer. What brand should I look for? Not sure the spec but each unit is a 2 1/2 ton carrier.

Re: Home HVAC caps [Re: 1978elcamino] #5451221 06/11/20 10:00 AM
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Donald Offline
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I am not sure I would do that if under warranty. They could say you replaced the cap and it caused another part to fail. But certainly looking at them for bulging or leakage might be a good idea.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Home HVAC caps [Re: 1978elcamino] #5451263 06/11/20 10:52 AM
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JMJNet Offline
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The brand is Amrad.
Made in US, it has 5 years warranty.

A lot of the Chinese made capacitor are like that.
There are some Mexico made that has better quality.

As for the spec, you need to see what capacitor is in there right now and buy one with the same capacitance.
Or, Amrad made capacitor with multiple heads to have a combination of multiple capacitance.
It is probably wise to invest in a cheap capacitance meter from Amazon or Ebay.


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Home HVAC caps [Re: 1978elcamino] #5451423 06/11/20 03:26 PM
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JohnG Offline
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JMJNet sounds like he is speaking from expierience, so I would go with that brand when possible.

The important specs are of course, capacitance. That must be matched exactly to the unit you are replacing. There is no fudging on this one!
Second would be temperature rating. Typical 90C, but higher is better.
Third would be Voltage rating. Typically 440V, but higher would also be better.

Don't forget, some caps are multi capacitance in order to reduce size and simplify assembly. There is nothing wrong with splitting the unit into two separate single capacitors for the sake of reliability.

Re: Home HVAC caps [Re: 1978elcamino] #5451449 06/11/20 04:07 PM
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WyrTwister Offline
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I have purchased capacitors at W W Granger or Johnstone Supply , but the company I work for has an account with each .

Having at least 1 spare for each is a good idea . There is likely a capacitor for the indoor / furnace fan , too .


Wyr
God bless
Re: Home HVAC caps [Re: 1978elcamino] #5451515 06/11/20 05:55 PM
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jhellwig Offline
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You have something else wrong if it keeps eating capacitors.


Sparks fly from my fingers.

1995 Chevy K2500 Suburban lt 5.7
2014 Toyota Sienna
1983 Chevy K5 350
Re: Home HVAC caps [Re: 1978elcamino] #5451536 06/11/20 06:28 PM
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zzyzzx Offline
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I can't imagine feeling the need to stock a spare capacitor or contactor when I can get one on one or two days in the mail.

Re: Home HVAC caps [Re: zzyzzx] #5451552 06/11/20 06:36 PM
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JMJNet Offline
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Originally Posted by zzyzzx
I can't imagine feeling the need to stock a spare capacitor or contactor when I can get one on one or two days in the mail.


Well, if you live in TX or FL or anywhere on the sourthern coast states, it may be wise to have spare.
Especially if the AC gave up on a >100F days (plural).

I personally, test the capacitor every spring season when the AC starts to be used to prevent failure possibility but I still have spare.

However, the service contractor should always have stock in their truck so that may not be necessary.
As for what they have in their truck is a mood point when we need it badly.


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Home HVAC caps [Re: 1978elcamino] #5451628 06/11/20 08:08 PM
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PowerSurge Offline
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Another vote for Amrad.


1993 Porsche 964, 2001 Ford SVT F-150 Lightning, 2004 Chevrolet Corvette, 2018 Toyota Tundra 5.7L
Re: Home HVAC caps [Re: 1978elcamino] #5451659 06/11/20 09:05 PM
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CDX825 Offline
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Amrad is probably about the only quality capacitor made for HVAC.


1984 Ford F250 6.9 Diesel C6 2WD Rotella T 15W40 NTZ Bypass Filter

1992 Mazda B2600 4x4 Amsoil Series 3000 5W30

1998 Ford Ranger 4x4 Pennzoil Platinum 5W30

Re: Home HVAC caps [Re: 1978elcamino] #5451688 06/11/20 10:34 PM
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MolaKule Offline
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Living in Florida where lightning strikes are common on AC lines requires a home Surge Arrestor.in the Load Center (Breaker Box).

You might try an Intermatic Panel Guard.


"So many shows out there dumb-down the country. It's so admirable to be part of a show that wants people to think." (David Krumholtz 'Charlie Epps' of NUMB3RS)
Re: Home HVAC caps [Re: 1978elcamino] #5451901 06/12/20 09:11 AM
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1978elcamino Offline OP
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Units in question have a start and a run cap, both units up and downstairs are exactly the same. The plan is to replace them and have a spare for each now that Im working from home, being without air in Florida is not really an option during the summer.

Re: Home HVAC caps [Re: jhellwig] #5451924 06/12/20 09:38 AM
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wag123 Offline
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Originally Posted by jhellwig
You have something else wrong if it keeps eating capacitors.
Not necessarily. Mostly it is just the cheap poor quality capacitors that are on the market these days. Another vote for Amrad here. I also espouse replacing a dual capacitor with two individual capacitors. In my experience this appears to solve the failing capacitor problem permanently (I have never had to replace another capacitor after doing this).

Last edited by wag123; 06/12/20 09:44 AM.
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