Melted compressor wires

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  #1  
Old 06-21-14, 06:19 PM
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Melted compressor wires

I have a carrier tech 2000ss heat pump and on the compressor under the plastic cap where the wires connect seems to be melted and shorting out causing compressor to not start there appears to be a rubber cover that is melted over where the wires connect at the compressor. Can I pull this cap off and inspect the wires to possibly repair the short? Any help with this would be appreciated.
 
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Old 06-21-14, 10:13 PM
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Welcome to the forums.

Yes... that cover is removable. Sometimes there is a metal clip holding it on.
Please make sure you have the power shut off before working on the wiring.

I would doubt it's a short as that would have caused a breaker to trip. It could be a broken wire at the terminal.

If you aren't sure what you are looking at before or after you work on that cover... post us a picture and we can help you further.

http://www.doityourself.com/forum/el...-pictures.html
 
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Old 06-22-14, 07:13 AM
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Thanks, I'm about to get started and will post picks as needed. Hopefully it is a broken wire, I found a you tube video by "Kung Fu Maintnence" which showed the tech fixing a unit with the exact same symptoms mine has but in complete reverse order. He fixed the wires first then replaced the capacitor an fan motor. I have replaced the capacitor, fan motor, and contactor. I am assuming that if this doesn't fix it, the compressor is bad.
 
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Old 06-22-14, 07:36 AM
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Okay, with the breakers off & tested to have no voltage, the conductors will need to be replaced as they & the compressor terminals may have lost their conductivity due to overheating.

Any terminal that shows signs of being overheated should have the surface filed down to good looking metal; hopefully its conductivity can be adequately restored.
 
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Old 06-22-14, 08:43 AM
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Turn off power to the unit and wait 3 minutes.

Safety glasses are recommended when servicing the compressor terminals.

If the terminals look this bad it is probably time for a new unit.
The compressor has blown terminals and will show a direct short to ground..


Using a meter that measures millions of Ohms measure each terminal to the copper pipe connected to the compressor (should read open/infinity), then measure across each terminal.

If a compressor is hot the thermal protection will open Common. Allow it to cool and take another reading if it is hot and you measure an open circuit between common and run.

Carrier uses black for common, yellow for run and blue for start but color codes vary and the wiring diagram on the unit will help determine your color code.



If the compressor does not have a short to ground or broken windings a terminal repair kit works better than crimping new connectors.
 
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Old 06-22-14, 08:53 AM
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Houston204, that is an excellent 5-star informative post for anyone having those problems!
 
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Old 06-22-14, 09:00 AM
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I like those QwikLug compressor terminals. They should use something like that right from the start.
 
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Old 06-22-14, 10:01 AM
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Thanks for the quick replies and great information, looks pretty bad though, I'm pretty sure I know the answer to this but I'll ask anyway, is there any possible way to repair this?
 
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Old 06-22-14, 10:03 AM
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You'll need to test. Can you post a picture ?
 
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Old 06-22-14, 10:07 AM
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If the compressor does not have a direct short to ground it is very possible that this problem can be fixed.
 
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Old 06-22-14, 10:07 AM
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Name:  image.jpg
Views: 4127
Size:  37.9 KBnot good I'm sure, hoping for a possible fix as a new compressor is nowhere within my budget.
 
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Old 06-22-14, 10:11 AM
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It's a gonner. Blown terminals are not repairable.

You need a new compressor or condenser.
 
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Old 06-22-14, 10:13 AM
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No.... unfortunately no fix available for that.
 
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Old 06-22-14, 10:22 AM
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Well, thank you so much for your help anyway. It was worth a shot.
 
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Old 06-22-14, 10:29 AM
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Looks like the charge would have been blown with that.Was it oily?
 
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Old 06-22-14, 11:04 AM
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There was black ash/grease around the area. So this moves into the area of professional replacement required.
 
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Old 06-22-14, 12:05 PM
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Your going to get into the debate about change compressor,condenser,I think that's r22 so throw in change out whole system etc. Weigh options,get at least 3 prices from different companies. Good luck.
 
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Old 06-23-14, 03:48 AM
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Would a failure like that be in the category of a burn out ? Requiring acid in the system to be taken care of ?

Thanks ,
Wyr
God bless
 
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Old 06-23-14, 01:39 PM
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It's a burn out. Line set, coil and condenser all need replaced IMO.
 
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