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  1. Since you are a contractor, I assume you’ve used...

    Since you are a contractor, I assume you’ve used your meter to figure out why it is running in heat mode.

    Your description of the problem is notably “untechnical.”
  2. Have you asked your contractor about it?

    Have you asked your contractor about it?
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    Do you have certification for refrigerant...

    Do you have certification for refrigerant handling? That is a requirement.
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    Sounds like hack work. The usual way is to route...

    Sounds like hack work. The usual way is to route the lineset through the attic and exit down through the soffit. Then there are no cuts in the roof and no potential for water leaks.
  5. “They” being the outfit that sold this to you....

    “They” being the outfit that sold this to you.
    Just admit that this is a DIY installation and we can close the thread.
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    I like your suggestion of a temporary...

    I like your suggestion of a temporary installation.

    You reminded me of an installation (not ours) with a UV light about a foot from a 5" pleated filter. The filter looked as if it had been exposed...
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    Damage by UV light?

    I went to a no cooling call the other day and found the ECM blower motor would not ramp up to cooling speed. A UV light had been installed in air handler between the coil and the blower housing. The...
  8. A trap is necessary if this is an air handler....

    A trap is necessary if this is an air handler. The drain is on the negative pressure side of the blower which will prevent draining if there is no trap. A vent before the trap must be closed.
    If...
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    First - there is no way to convert an R-22 system...

    First - there is no way to convert an R-22 system to use R410-A because the pressures are 50% higher for R410-A. To do so would require a different compressor and a different metering device. ...
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    Replacing metal ducts with flexible duct is a...

    Replacing metal ducts with flexible duct is a step backwards. Flex can be installed quickly, but if not installed correctly it yields less air flow. That's the way it's usually done.
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    There's not nearly enough information to give an...

    There's not nearly enough information to give an educated answer to your question. But here are some comments - if the system needed 6+ lbs of refrigerant added you need to find and repair the leak....
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    Rust never sleeps. Or so someone said.

    Rust never sleeps. Or so someone said.
  13. That’s a poor excuse for a duct. 25% of the area...

    That’s a poor excuse for a duct. 25% of the area of the grille is being used by the duct. No wonder it’s loud. There’s no way it’s moving enough air.
    However your options are limited as you’re not...
  14. Yes, that would give you measurements of what the...

    Yes, that would give you measurements of what the unit sees.
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    Thats not a gauge. It is to set the point at...

    Thats not a gauge. It is to set the point at which the damper opens.
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    Opinions don’t matter. Have a technician inspect...

    Opinions don’t matter. Have a technician inspect it and show you what is is and how it operates. While he’s there have him measure static pressure.
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    That actually is a damper. It a static pressure...

    That actually is a damper. It a static pressure actuated bypass damper. You can remove the flex to view the damper if you absolutely must see it to prove to yourself that it is there. It does not...
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    Most houses donít have a system that I would...

    Most houses donít have a system that I would consider to be well installed. If I buy another house Iíll probably replace the equipment and most of the duct system.
    You should have the system...
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    Fiberglass is non-toxic. It is not like asbestos....

    Fiberglass is non-toxic. It is not like asbestos. Fiberglass can be cleaned out of the equipment. In fact, it is likely that the equipment has a fiberglass liner. Most do.
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    Are you stalking me again? :grin2:

    Are you stalking me again? :grin2:
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    Yes, it is an issue. Any fiberglass which has...

    Yes, it is an issue.
    Any fiberglass which has been sucked in has likely covered the secondary heat exchanger (if it is a 90% furnace) or the blower or the evaporator coil.
    I don't like filters in...
  22. Supply air, not "coming back." No comment on...

    Supply air, not "coming back."

    No comment on your training. HVAC is more complicated than it appears in a YouTube video.

    Site policy is that we don't give advice for DIY.
  23. Are you (the homeowner) taking these readings? If...

    Are you (the homeowner) taking these readings? If so, how and what is the extent of your training and experience?

    Your post says "taking in air at 80F and returns are 70F". Isn't taking in and...
  24. Too late. "We're on a mission from God."

    Too late.

    "We're on a mission from God."
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    I suspect there is an air flow issue. Please tell...

    I suspect there is an air flow issue. Please tell us the size of the supply and return ducts as well as the size of the openings for the supply and return which are on the unit.
  26. Thread: Slime

    by kdean1
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    235

    Though I don’t see a question in your post, (?) I...

    Though I don’t see a question in your post, (?) I assume you want to know how to stop the slime.
    I suggest cleaning the evaporator coil with dish washing soap followed by a good rinsing.
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    That’s a sloppy looking lineset. Par for the...

    That’s a sloppy looking lineset. Par for the course for HW work. We are not fans of HW companies or the work done by their (hack) contractors.
  28. You can deal with too much supply air. It’s...

    You can deal with too much supply air. It’s always possible to reduce air flow. That’s much better than too little because you can’t go beyond the physical limits of the blower and the ducts.
    The...
  29. I don't remember working on your system. :grin2:...

    I don't remember working on your system. :grin2:

    But as long as you're willing to go for months without air conditioning and spend hours and hours haranguing the HWC, go for it. Just don't come...
  30. Far too many people think that new equipment will...

    Far too many people think that new equipment will solve their problem. You've already seen the low level of professionalism of the contractors and the reluctance of the HWC to resolve problems...
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    Yeah, there's a lot of mass to heat up to braze...

    Yeah, there's a lot of mass to heat up to braze those. They are a challenge.
    Good for you on staying with it to finish it.
  32. Nest is so unreliable that I refuse to use them.

    Nest is so unreliable that I refuse to use them.
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    Ask them how they choose the size of equipment....

    Ask them how they choose the size of equipment. Wrong answers include square footage, or the size of the existing equipment. The only right answer is with a load calculation by Manual J.
    Ask how...
  34. Not normal

    Not normal
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    Before doing any of the things you mentioned you...

    Before doing any of the things you mentioned you need to know more about the house. Start with a blower door test to determine how leaky it is. Then get a load calculation known as manual J and have...
  36. The pressure before the return is 0. If set up...

    The pressure before the return is 0. If set up properly, the systems won’t run at the same time.
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    Your situation is typical of two story houses....

    Your situation is typical of two story houses. The sensing device (thermostat) controls the system based on the temperature of the first floor.
    You need more or bigger ducts to the second floor....
  38. Look for contractors who have received training...

    Look for contractors who have received training from NCI here -
    https://www.myhomecomfort.org/
  39. A trap is not needed when the coil is under...

    A trap is not needed when the coil is under positive pressure. But having a trap such as yours won’t be a problem. The union was not necessary because the trap has access for cleaning.
    Your work...
  40. But isnít bigger better? :gah: (No, itís not.)

    But isnít bigger better? :gah:

    (No, itís not.)
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    Wishful thinking. You came to us for advice and...

    Wishful thinking.
    You came to us for advice and we’re giving it to you.
    The only way home warranty companies stay in business is by NOT paying for new stuff. They are NOT an insurance company....
  42. As a starting place for the duct sizes, what is...

    As a starting place for the duct sizes, what is the size of the openings on the package unit? It is common, but wrong, to cover the rectangular opening and install a round starting collar for flex....
  43. I apologize for my wrong answer about the port. I...

    I apologize for my wrong answer about the port. I based it on my experience with my own Honeywell unit which ( I think ) was manufactured by ThermaStor 10 or so years ago. It failed last summer and I...
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    IIRC, it was 3 months, or more. Then he came back...

    IIRC, it was 3 months, or more. Then he came back to say it broke down again in a week.
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    Home warranty is a rip-off. Google home warranty...

    Home warranty is a rip-off. Google home warranty complaints.
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    Aside from the furnace filter, what is the...

    Aside from the furnace filter, what is the provision for combustion air for the mechanical room?
  47. Thread: R/H% question

    by kdean1
    Replies
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    176

    WHOLE house humidifier can maintain 40-50% RH.

    WHOLE house humidifier can maintain 40-50% RH.
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    I have to disagree about the outdoor thermostat....

    I have to disagree about the outdoor thermostat. Many reference the outdoor temperature to determine use of heat pump or furnace.
    Are you referring to some other aspect of dual fuel?
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    You need a thermostat such as Honeywell Prestige...

    You need a thermostat such as Honeywell Prestige IAQ. You may be better off having a technician install it. Dual fuel wiring is more complicated than a heat/cool system.
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    It takes less than 10 minutes to measure static...

    It takes less than 10 minutes to measure static pressure. We measure it on every system. You need a different technician.
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