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  1. #27
    Join Date
    Feb 2004
    Location
    Midwest
    Posts
    9,937
    Same problem here. I really think the heat is the main culprit. I'm about ready to put the capacitor inside the house and run wires outside.

    I agree that the Chinese ones seem to get whipped faster. But I'm replacing plenty of the non-Chinese ones too.
    But it seems kinda foolish to replace a dead non-Chinese one with a new Chinese one.

  2. #28
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by ar_hvac_man View Post
    It was actually worse for us last year. It was so bad supply houses were out. We were having to stack 2 and even 3 together at times.
    With the 110-115 temperatures we were having last year in my area, I started calling last summer Capacitormageddon.
    I was turning over my capacitor inventory so fast, I didn't even bother restocking my bins, I just had a big box-o-capacitors on the floor of my truck.

    I did a lot of parallel capacitor wiring due to supplier shortages around here.
    This summer some of the suppliers bulked up their stock by a huge amount, but with the more normal 100 high temperatures we are getting this year, we are not going through nearly as many capacitors.
    If more government is the answer, then it's a really stupid question.

  3. #29
    Join Date
    Jun 2009
    Location
    Upstate SC
    Posts
    1,439
    Quote Originally Posted by mark beiser View Post
    I did a lot of parallel capacitor wiring due to supplier shortages around here.
    Did you leave them parallel or go back and change them?

    I've had a parallel setup fail where the 45 of the 55 failed and left me with 10mfd.

  4. #30
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by jdblack View Post
    Did you leave them parallel or go back and change them?

    I've had a parallel setup fail where the 45 of the 55 failed and left me with 10mfd.
    I leave them, there isn't any real reason to go back and change it.
    I used a lot of Turbo200 and 200x capacitors last year too, the supply houses never seemed to be out of those.
    If more government is the answer, then it's a really stupid question.

  5. #31
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    6,051
    I actually witnessed one go out on limit (when the top bulges out) live. It was impressive.

    Upon my initial inspection. I noticed someone replaced fan mtr so it had a seperate cap.

    And the compressor was on the 5 mfd side of existing run cap. So I shut unit off and put compressor start on herm terminal.

    It started and ran for a couple minutes. Then top just "popped " up like popcorn.

    Compressor kept running though. And would have kept going if conditions weren't extreme.

    Same as when units have hard starts sometimes compressor keeps running and they may not know for awhile anything is wrong. Which cant be good for compressor.

  6. #32
    Join Date
    Aug 2010
    Posts
    3,674
    It would be interesting to mark capacitors with several temperature crayons so you can observe how hot they get.

    Quote Originally Posted by midhvac View Post
    Same problem here. I really think the heat is the main culprit. I'm about ready to put the capacitor inside the house and run wires outside.
    Not the same method, but same yield can become a reality.

    Has anyone tried zip tying to the suction line to let the refrigerant pick up the heat?

    Another option is to put it mod the case a bit, so the air flows over the capacitor when the fan is running.

  7. #33
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Quote Originally Posted by mark beiser View Post
    With the 110-115 temperatures we were having last year in my area, I started calling last summer Capacitormageddon.
    I was turning over my capacitor inventory so fast, I didn't even bother restocking my bins, I just had a big box-o-capacitors on the floor of my truck.

    I did a lot of parallel capacitor wiring due to supplier shortages around here.
    This summer some of the suppliers bulked up their stock by a huge amount, but with the more normal 100 high temperatures we are getting this year, we are not going through nearly as many capacitors.
    What I find interesting is that we are seeing the same extreme heat, and duration of heat. The only difference I can see this year is the drought and more significant, IMO, is almost zero storms. No power flickers. It makes me wonder if compressors trying to start against a load has a lot to do with capacitor failure? Then again, last year I saw as many heat pumps, which generally have time delays on the boards, blowing capacitors as I did straight A/C's.

    The only fact I can attest to is that last year was much harder on capacitors than this year.

  8. #34
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by ar_hvac_man View Post
    What I find interesting is that we are seeing the same extreme heat, and duration of heat. The only difference I can see this year is the drought and more significant, IMO, is almost zero storms. No power flickers. It makes me wonder if compressors trying to start against a load has a lot to do with capacitor failure? Then again, last year I saw as many heat pumps, which generally have time delays on the boards, blowing capacitors as I did straight A/C's.

    The only fact I can attest to is that last year was much harder on capacitors than this year.
    Well, as with us, a much higher percentage of your regular customer base may have new run capacitors this year than last year too.
    If more government is the answer, then it's a really stupid question.

  9. #35
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
    Posts
    587
    Quote Originally Posted by ICanHas View Post
    It would be interesting to mark capacitors with several temperature crayons so you can observe how hot they get.


    Not the same method, but same yield can become a reality.

    Has anyone tried zip tying to the suction line to let the refrigerant pick up the heat?

    Another option is to put it mod the case a bit, so the air flows over the capacitor when the fan is running.
    I don't think it's the heat on the capacitor. I think it's voltage being dropped to keep up with load.

    Um do you really want to have electrical devices tied onto your refrig lines? I spose a short would cool it off in a big hurry with liquid refrigerant bathing the thing.

  10. #36
    Join Date
    Jan 2012
    Location
    indy
    Posts
    471
    I'm saying the heat, power loss?? nooo when that dude is under a load at the hottest part of the day 100+ outside it says yep I've had enough ( POP ) I bet that cap would burn you if you touched it

  11. #37
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
    Posts
    587
    Quote Originally Posted by hvacmike85 View Post
    I'm saying the heat, power loss?? nooo when that dude is under a load at the hottest part of the day 100+ outside it says yep I've had enough ( POP ) I bet that cap would burn you if you touched it
    Yeah and it's gonna heat up a whole lot faster when the voltage drops. Probably have compounding problems.

  12. #38
    Join Date
    Sep 2009
    Location
    S.C.
    Posts
    1,412
    I see the Caps lasting about 5 or 6 years. I normally keep about 50 on the truck. This week I haven't replaced a single one. I've had air-flow problems at almost every call this week. I guess caps next.

    Here's a blown one from last week.
    Attached Images Attached Images  
    Yes, I know I Shouldn't But I Just Can't Help Myself...

  13. #39
    Join Date
    Jun 2003
    Location
    New Hampshire
    Posts
    2,666
    I read somewhere that if you gang up caps if you don't have the right size to get the correct capacitance then you are actually better off because of more surface area to dissipate the heat.
    But there never seems to be enough room in the smaller condensers.

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