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  1. Normally I would PM you however given the nature...

    Normally I would PM you however given the nature of my reply I am hoping the moderator will allow it since it closes the question out...

    I believe you are referring to the condenser clunk on cycle...
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    Yes. Triangle shaped. One big duct entering and...

    Yes. Triangle shaped. One big duct entering and 4 smaller ones exiting (2 each on the other two sides) And, the box is almost twice as high as it needs to be. The top of the biggest duct connects...
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    New finding that I need to test again tomorrow,...

    New finding that I need to test again tomorrow, but it seems something else additional (or related) may be going on...

    The measurements I had taken for the purpose of this whole discussion was...
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    The measurements taken at the AHU were taken...

    The measurements taken at the AHU were taken directly ABOVE the AHU, so any heat generated by the fan is already largely reflected in the readings.
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    Okay, here's the numbers. It has been a bit...

    Okay, here's the numbers. It has been a bit overcast during the days lately so the attic temps are about 10 degrees lower than normal, but at least you can get an idea....

    Night: Attic Temp =...
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    Update: Today I pulled one register and the...

    Update:

    Today I pulled one register and the boot/box is flush to the drywall. I also put the thermometer up into the duct, well past the boot. Same result, still gaining about 5 degrees. So the...
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    I have one other new theory/question to run by...

    I have one other new theory/question to run by you guys...

    I had speculated at the beginning of the thread maybe the 5 degree increase being seen at most ducts was due to attic infiltration in the...
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    Is there anything I could do to further insulate...

    Is there anything I could do to further insulate the ducts and the supply plenum? If I were to go buy a bunch of thin bat insulation and wrap it around (or lay it over) the main line and the supply...
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    Thanks for the replies thus far. Lots of...

    Thanks for the replies thus far. Lots of questions, will try to answer them all here....

    No, roof was not layered before, always and still is a single-layer shingle, single felt underlayment.
    ...
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    I used a digital probe-type thermometer, nothing...

    I used a digital probe-type thermometer, nothing high-quality but adequate enough for simple troubleshooting purposes. It's a fast-reaction type so I am able to watch temperature fluctuations....
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    Actually, I did make the mistake of a slightly...

    Actually, I did make the mistake of a slightly darker roof. But realize, when I say darker I'm talking just a shade darker. The new roof is gray as well but if the old roof was maybe a 5 on the...
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    Theories on Temp Drop Please

    Hi,

    I recently noticed my split system Carrier heat pump seems to be running more than normal this Summer, and after checking the obvious culprits it appears something abnormal may be occurring. ...
  13. Actually that's a fair question. I know it's...

    Actually that's a fair question. I know it's probably black mold because the stuff is all around the houses here in Florida. It could be some form of black oxidation I suppose but unlikely, when...
  14. Soap and water will kill off the black mold in...

    Soap and water will kill off the black mold in between the fins? uh...okay, will do, thanks.
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    Yeah, the Genteq are being made in various places...

    Yeah, the Genteq are being made in various places outside the US from what I've read, including Mexico. That doesn't necessarily make them bad I suppose...but I was guessing the Amrad are probably...
  16. What Would Be Safe to Use on Mini Dehumidifier Coils?

    I've got a little stand-alone dehumidifier and after 2 years it is starting to blow mildew-smelling air. I just took it apart and can see some traces of black mold on the evap coils. What might be...
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    Amrad or Genteq Run Capacitor?

    Any strong recommendation one way or another if I had a choice between an Amrad or Genteq dual round run capacitor?

    Thanks,

    Sonic
  18. Good point on the parts being under...

    Good point on the parts being under warranty...will have to check on that. Still though, not sure if I could get a Carrier dealer to give me the part. I don't mind paying the little amount for a...
  19. Or....would a slightly higher rated cap be safe...

    Or....would a slightly higher rated cap be safe to substitute? I can get new caps at a local surplus store rated as follows: 55uf/10uf 440 VAC

    I realize the higher voltage rating is okay.... but...
  20. Troubleshot My System, Need Parts Guidance

    Hello,

    I have a fairly new (30 month old) Carrier split system heat pump and recently the outside condenser unit began making a slow, "whirring" noise on start-up. I immediately suspected maybe...
  21. Okay, thanks guys, that "blistering" is likely...

    Okay, thanks guys, that "blistering" is likely just traces of normal copper/weld oxidation I'm guessing.

    I'm going to try and get a ventilation expert out to the house next to see maybe if he can...
  22. Excellent observations, and very true. The metal...

    Excellent observations, and very true. The metal connection points on the trusses near the peak are scalding hot. So yes, lots of heat being transferred through the trusses and decking. Would it...
  23. No, the black thing you see is just a rubber...

    No, the black thing you see is just a rubber "seal" I put over the line because the line enters a black poly pipe before it goes under the slab. Since the line is under the drip eave I was concerned...
  24. After climbing through the attic last night I...

    After climbing through the attic last night I found the last two rafter bays in the back corner of the house are not insulated, and after checking just now in the heat of the day the drywall on the...
  25. It would help if I had an idea of what a "normal"...

    It would help if I had an idea of what a "normal" temp is for an attic in Florida with passive ventilation. Right now, I am seeing a 30 degree delta between the attic and the outside temps when at...
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