Capacitor for Condenser Unit

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  #1  
Old 05-29-13, 07:38 PM
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Capacitor for Condenser Unit

I am helping my sister by changing a new capacitor for her AC unit.

I have a couple of questions:

1st, is it normal for a capacitor to be installed upside down with the prongs facing down?

2nd, can you help me locate the correct capacitor for her AC. I attached pictures but could not read the original capacitor.

Thanks
 
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Old 05-29-13, 07:46 PM
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40mf + 5mf, 440v

mf = microfarad

It's a dual capacitor; both values have to match.

Are you sure the capacitor is bad? Fan motor which needs a little push to get going or compressor which won't start indicate that the capacitor is bad. (other things can cause the compressor not to start)
 
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Old 05-29-13, 09:17 PM
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The entire unit is fine. the unit is over 20 years old so I just thought I change it before it goes bad since I am planning to put a hard stay kit too.

Could you explain more about both values have to match? Do you mean 40mf and 5mf?

Thank you
 
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Old 05-30-13, 12:42 AM
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Do you mean 40mf and 5mf
Yes.......
It's a dual section capacitor. It will have both ratings on it just like the one in your picture. It will have three leads. The voltage capability of the unit is 440 vac.

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Old 05-30-13, 03:39 AM
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Ok, I will look for it on Amazon and post back here just to verify. Thank you

Also, back to one of the questions. Is it right that the capacitor was installed upside down?
 
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Old 05-30-13, 11:34 AM
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Is MF the same as MFD?

This one is awfully cheap. Does price matter to quality?
Aviditi 38AVI Capacitor, 40/5 Microfarad, 440-Volt: Amazon.com: Industrial & Scientific


Here are some more:
Amazon.com: 40 5 440 capacitor
 
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Old 05-30-13, 06:16 PM
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dont change it unless it is weak.... they don't make capacitors like they used (they don't last as long today)
 
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Old 06-27-13, 11:14 PM
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HVACTechFW, I took your advice and replaced it with the exact same model.
 
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