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Ruud heat pump capacitor size

Hi, I am currently working on a five ton Ruud heat pump. The run capacitor for the compressor is bad and all the information is rubbed off of the capacitor. Can you tell me how to get the correct size capacitor. everyone i talk to at the parts stores just tell me to use a hard start or the turbo 2000 but can not tell me the correct size. The condensor model number is upca-048jas and the compressor model number is elcrml 0400

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  • jun_garcia Aug 17, 2008

    How do I size a 2 HP 125V pool pump start capacitor? The capacitor label is no longer readable.

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A hard start or turbo 2000 will not work if the run capacitor is bad. You will need to contact a ruud supply house or dealer with model and serial to find out the exact match. I have checked my sources and came up empty handed. You could try getting a 35/5 MFD at 440V or a 45/5 MFD at 440V as these are the most common capacitors used in Rheem and Ruud equipment. The key is that you will need to check your amp draws on both motors against the nameplate rating to make sure that you are not over-amping the motor. Also check the nameplates on both of the motors. Most condenser fan motors and some compressors list the capacitor size they require in a somewhat less than conspicious location on the label.

Posted on Jun 27, 2008

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Posted on Jan 02, 2017

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1 Answer

Rpnl-030jaz condenser fan not turning


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What type of run capacitor do I need for a Ruud AC model UPNJ-031JAZ (outside unit)


Looks like it should be a 35/3 370VAC. If it is not legible on the old capacitor read the data plate on the fan motor and compressor. These should say "uf" or "mfd" rating. Good Luck!!

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My 4 year old Ruud home a/c compressor stopped working. inside fan blows but compressor won't turn on...what can I do prior to calling the gas company who installed the unit...


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I have a 25 year old Ruud A/C. The outdoor fan isn't turning and I can hear the condensor humming. There are 2 capacitors in the the electronics box that the schematic says are running capacitors. ...


The 3 microferad capacitor goes to the fan motor. The bigger one goes to the compressor. If the capacitor is swollen or pregnant looking it is shorted and needs to be changed. If it has discharged oil it has shorted out. If you can't read the mfd (microferad) you can go by the rated tonnage of the air cond for rule of thumb.

2 ton condenser = 25mfd capacitor
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again, this is rule of thumb but should get your unit running again.

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I have a Ruud Model # UACC-036JAS. Any idea on


Hi, yes the number you are showing me 036 indicates its a 3 ton unit. For every ton of cooling, you will have 12,000 btu's of cooling. 36 divided by 12=3 ton unit. Its showing me also its a Ruud Handler 2.0 ton which would be a Model# UACC-024JAS? If your mobel number is the one you gave me, UACC-036JAS, this is a 3 ton unit, absolutely no questions. I hope I have been of help to you. I am a licensed air conditioning / Refrigeration /Heating Contractor. Let me know if I have been of help.
Sincerely,
Shastalaker7
PS If this is a split system with the indoor air handler and condenser outdoors, both coils must be the same tonnage for it to work for you properly. You can't have a 2 ton indoor evaporator coil with a 3 ton condensing unit.

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1 Answer

We have a fairlynew 5 ton Central Ruud or Rudd unit that it is so noisy in the yard that we can not stay out there. We thinkit is the compressor. Help


I have a new 13 seer rheem or ruud same thing. I can not here it run. Uou must have a bad compressor. Ruud put schroll compressor in and when they start to go out they will drive you nuts they are so loud. Get it changed before your warranty runs out. Ruud will change your compressor if it to noisy. No problem. Russ
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