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Old 08-05-2008, 09:43 PM   #1
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Just replaced capacitor but air not cold anymore


Hi,

I just replaced the capacitor on my Goodman CKL 36 outside unit because it was bloated and the compressor and fan wouldn't start.

Now both the compressor and fan are running and its cooling again but not as it was before this event. I've been running it all day but the house won't cool below 80 degrees. (I've got target temp set at 74). It used to cool to 74 within an hour.

Any ideas? Did the capacitor failure maybe mess something else up or is this just a coincidence? (It's been ~100 degrees every day here in Memphis for a while)

Thanks for any help or advice!
-JT


Last edited by traynor; 08-05-2008 at 09:46 PM.
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Old 08-05-2008, 09:45 PM   #2
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Just replaced capacitor but air not cold anymore


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Did the capacitor failure maybe mess something else up
Maybe if it failed by shorting, rather than if it failed by opening or by changing value; if you still have the old cap you could check it for a short.

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Old 08-05-2008, 10:13 PM   #3
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Just replaced capacitor but air not cold anymore


I left the dead capacitor at the parts house.

Everything's been running well for 10 hours it's just not cooling the house below 80 degrees anymore.

Could you elaborate?

Thanks,
-JT
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Old 08-05-2008, 10:29 PM   #4
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Just replaced capacitor but air not cold anymore


[quote=traynor;146256Could you elaborate?[/quote]

Well, maybe a shorted cap could ruin a winding in the compressor. You'll need a clampon ammeter to check compressor current draw, and compare it with specs.

But before you do all that, HVAC people on this forum can probably come up with many things that are easier and quicker to check, that could account for your symptoms.
Even if some of the checks are unlikely to uncover the problem, if they are quick and easy and safe to do, at least they can tell what it isn't.

Since you just worked on this, I'd say retrace your steps and find the connector you left off, or accidentally pulled off.
You might need a pair of fresh eyes to see something that you are looking at but not seeing.
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Old 08-05-2008, 11:09 PM   #5
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Just replaced capacitor but air not cold anymore


Roger that.

Anyone else want to chime in? We're ready with a multimeter...

Otherwise, I took a photograph of the connection before removing the old capacitor and replaced the new one with all the wires in the exact same places. Would it run like it is now if I hadn't put them all on the right connectors?
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Old 08-06-2008, 11:07 AM   #6
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Just replaced capacitor but air not cold anymore


You may be over thinking the problem here. If the compressor and condenser fan is running continuously with the new capacitor, then I highly doubt that is the issue. Is your suction line cool or cold to the touch? What is the temperature difference between return air and supply air when the AC is running? Sounds more like a refrigerant issue than a capacitor issue in my experience.
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Old 08-07-2008, 12:15 AM   #7
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Just replaced capacitor but air not cold anymore


Hi Guys - after sundown it all cooled better and today everything works well.

It just took a long time because the house was so hot (!!!) It's nearly 100 degrees every day here in Memphis....

thanks for your help!!!
-JT
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Old 08-07-2008, 09:24 AM   #8
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Just replaced capacitor but air not cold anymore


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Originally Posted by traynor View Post
Hi Guys - after sundown it all cooled better and today everything works well.

It just took a long time because the house was so hot (!!!) It's nearly 100 degrees every day here in Memphis....

thanks for your help!!!
-JT
So do you think the cap was bad, after all?
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Old 08-07-2008, 04:54 PM   #9
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Just replaced capacitor but air not cold anymore


It had a bubble swelling out of the top where the wire connectors were.

That's why the whole system shut down to begin with and my house got so hot that I had to cool it for 24 hours!

Cheers!

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