A.C.Capacitors

[kdeiss]

I am planning to replace the Capicitors in my AC unit next spring
once upon the roof i would like to have the correct replacements.

Can somone confirm the ratings

30/5 MFD 370V Run Cap

43/56 Mfd 250 V Start

Duo Therm Dometic

Model 59515.331
Serial 210-30311

2002 Montana 2955RL

Thanks Ken

[jwedell]

Unless they are defective there is no need to replace them.

[racerjoe]

Can I ask why? A capacitor when they fail,they fail, will work normal until then. even a new one might not last as long as the one you now have.

[Ozz]

I agree, some last for 20 years, some do not, as stated, the new one will probably fail quicker, as they find cheaper and cheaper ways of making them each year. The plant that was shut down 2 years ago when there was a shortage was down in Mexico.
If you want, just buy one and throw it in the drawer for an emergency.

[snfexpress]

In our limited experience, the OEM airs do not come with hard start capacitors, so we added one.

[Fjkiss]

I agree with Ozz, and Michael had to replace ours and added the hardstart works great

[kdeiss]

quote:Originally posted by Ozz

I agree, some last for 20 years, some do not, as stated, the new one will probably fail quicker, as they find cheaper and cheaper ways of making them each year. The plant that was shut down 2 years ago when there was a shortage was down in Mexico.
If you want, just buy one and throw it in the drawer for an emergency.

Ozz do you know the ratings ?
At least I would like to have a spare

I sold supplies including Capacitors to motor repair shops for over 40 years I can pick up spares from an old customer at a good price

any help with ratings would be helpfull

Ken

[Ozz]

Any generic hard start kit would work within the ratings, the electronic ones are good, you don't need the cap and relay combo that way: http://compare.ebay.com/like/110915534400#
The dual, or split caps serve both the compressor and the fan motor.
I will look and see if I can find that, where did you fin the numbers you posted?

[kdeiss]

quote:Originally posted by Ozz

Any generic hard start kit would work within the ratings, the electronic ones are good, you don't need the cap and relay combo that way: http://compare.ebay.com/like/110915534400#
The dual, or split caps serve both the compressor and the fan motor.
I will look and see if I can find that, where did you fin the numbers you posted?

Not sure what site I got those rating they are not specific to my Model number 59516.331

[Ozz]

I searched and came up with zip and pip, all I found was a heat pump. You might have to remove the cover and get the numbers off of yours, they are on the cap. When I searched i found hard start kits come with the heat pumps, maybe not regular units I don't know, haven't looked at mine. Some hard start kits are really compact, only 1 1/2" round, some black some blue on the smaller A/C units.
I don't work on the RV units, but they are basically window units on vacation

[kdeiss]

Thanks Ozz I will remove the cover in the spring get the numbers and that way i will have a spare.

[Ozz]

OK, you can get them here:

1119 Southeast 12th Court
Cape Coral
(239) 242-8796

Johnstone Supply


www.johnstonesupply.com/

[kdeiss]

quote:Originally posted by Ozz

OK, you can get them here:

1119 Southeast 12th Court
Cape Coral
(239) 242-8796

Johnstone Supply


www.johnstonesupply.com/

Yep I sold to Johnstone Supply

Thanks Ozz

[snfexpress]

On our OEM used a Supco spp6

[Ozz]

Hard-start capacitors are sold for a range of A/C sizes, the one Michael bought is for 1/2 H.P. to 10 H.P., so you can see it is not critical which one you get. 1 H.P. is a 12,000 BTU, or 1 ton unit.
The run cap's are different, you need to replace them with the same one, actually you can fudge a little in a pinch, but it is best to replace a 5 MFD 45 440 with the same (as an example size)
The dual capacitors, or 'split' caps have one common terminal and a 'herm' marked: (Compressor) and a 'fan' marked terminal, don't mix these wires up.

Dual Cap:
http://tinyurl.com/9b8ps3h

[snfexpress]

Didn't know that. Thanks Ozz.