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  1. #1
    Join Date
    Jul 2008
    Location
    Michigan
    Posts
    1

    Replace A/C Compressor??

    I have a circa 1992 Carrier A/C residential A/C system Model 38TKB042310 that has been giving us some trouble over the past few years, but this year the tech says it needs a new compressor.

    2 years ago, the evaporator was freezing up and the system was low on refrigerant. He added some and the system worked fine for the rest of the year. Tech also replaced the cap on one of the schrader valves.

    Last year the evaporator was freezing up and the system was low on refrigerant. He added some and the system worked fine for the rest of the year.

    This year we decided to be pro-active and we called the tech out before the evaporator had a chance to freeze up expecting for him to add refrigerant. However, he told us that they must have fixed the leak and the system was overcharged and he removed refrigerant. After he performed the work, my wife said that the compressor was so loud that she couldn't hardly talk to a friend inside the house. This lasted about 30minutes or so. We called for a tech to come back out to look at it, but by that time the system was working properly again. The system worked properly for about a 3 weeks afterwards.

    We went on vacation (set the Tstat to 84 degrees). When we returned home, I turned the temp down on the Tstat, but the compressor didn't turn on. The condensor fan is running, but the compressor usually won't turn on. If I let the system sit, the compressor will turn on and usually runs for 5-10minutes and then shuts off (fan continues to run). It is not cooling when the compressor runs (high pressure side seems to get warm, but low pressure side is not cold at all).

    The service tech says that the compressor needs to be replaced because it's tripping the overload protection. He says that it's pulling 38A (on a 40A circuit). He stated that the motor could have been damaged if there was a power surge when the compressor was turning on (while we were gone). If this were the case, I would think that the system would cool when the compressor was running. He also said that there could be internal damage to the compressor. This seems more likely to me.

    Sorry for the long story, but I thought the details and history would help. Does anyone have thoughts on this? I'd rather not replace this if it's not necessary. Also, any chance that removing some refrigerant this year put the system in a situation that could damage the compressor? Should I get a second opinion?

    Thanks!!!
    Last edited by nocool4u; 07-08-2008 at 07:32 AM.

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,824
    You should edit out the price. Its not allowed her, Thank you.

    Yes, get a second opinion.

    Even though money is tight. You'll be better off with a new system. Your system probably still has a leak. And a new compresor willonly have a 1 year warranty.
    A new system will have a much longer warranty.
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  3. #3
    Join Date
    Jun 2008
    Location
    west point, ga.
    Posts
    328
    For one take your price out per rules.It would be hard for me to say without looking at it.good luck.

  4. #4
    Join Date
    Oct 2007
    Location
    Aurora , Colorado
    Posts
    32
    Get a second opinion and if the compressor is bad go ahed and replace the condensor since your unit is about 16 years old get the more efficent with better seers. good luck

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,824
    Quote Originally Posted by massoudv View Post
    go ahed and replace the condensor since your unit is about 16 years old get the more efficent with better seers. good luck
    Not just the condenser. Needs to have matching indoor coil.
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