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  1. Replies
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    There is a new ac brand called comfortstar, all...

    There is a new ac brand called comfortstar, all units made in china, and their small sizes (2.5 t and under) all use panasonic/hitachi rotary compressor. They are super quiet. All these compressors...
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    10
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    393

    Yeah, the mounting kit only good for 1/2hp and...

    Yeah, the mounting kit only good for 1/2hp and under.
  3. B149-10 8.4 is talking about appliances...

    B149-10 8.4 is talking about appliances over400,000btu.
    When the air supply is provided by natural airflow from the outdoors for natural-draft, partial fan-assisted, fan-assisted, or power...
  4. Replies
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    3,783

    You may find it is difficult to flush the unit...

    You may find it is difficult to flush the unit without the service valve kits. Navien combi has a flue gas limit switch preset at 149, but it is recommended to us higher temp cpvc venting.
  5. Replies
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    7,035

    Looks identical to another brand "comfortstar"....

    Looks identical to another brand "comfortstar". They are made in China, and small units(<3ton) use Toshiba/Panasonic rotary compressor. They are quiet and look nice. The compressor has been used in...
  6. Only compressor froze up?

    Only compressor froze up?
  7. If you consider more about extreme weather, why...

    If you consider more about extreme weather, why not put in a P series, it will performance the same as low as the temp 5F. That means even at 5F, the unit will give same heat output as at 47F.
  8. Replies
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    1,469

    For high SC, maybe low ambient, non condensible....

    For high SC, maybe low ambient, non condensible.
    For low SC, dirty condenser coil or bad condenser fan.
    I dont think low airflow at evaporator and over feeding metering device will definitely cause...
  9. Thread: Low ambient

    by vibration
    Replies
    11
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    1,047

    Under that low ambient, and maybe low load, you...

    Under that low ambient, and maybe low load, you can't check the charge in cooling. Why you doubt it? Did you weigh in, or just released from condenser?
  10. Replies
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    2,452

    amana once had 80v ignitor. Later, all changed to...

    amana once had 80v ignitor. Later, all changed to 120v. So if you change the board, make sure the ignitor is not 80v.
  11. Replies
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    1,460

    We had same issue with amana cause they put...

    We had same issue with amana cause they put something in that service valve, and no installers paid attention to that changes in installation manual. It only leaks in extremely cold weather.
  12. Replies
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    1,878

    When the fan runs continuously, the first thing I...

    When the fan runs continuously, the first thing I would check is limit.
  13. Faststat

    Faststat
  14. Replies
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    7,646

    Lennox will have new replacement for control...

    Lennox will have new replacement for control board. They already have the part number, but no price for that.
  15. Replies
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    864

    drain problem, then water went into pressure...

    drain problem, then water went into pressure switch and damaged the switch.
  16. Replies
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    4,012

    Frankly, for service, Amana/goodman is my...

    Frankly, for service, Amana/goodman is my favorite.
  17. Replies
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    3,567

    Normally we check static pressure (furnace not...

    Normally we check static pressure (furnace not working) and working pressure (furnace is firing), calculate the pressure drop, pressure drop is more critical.
  18. Replies
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    4,358

    I guess the installer drilled the hole for...

    I guess the installer drilled the hole for exhuast at a wrong pitch, so the water stays in the horizontal pipe through the wall.
  19. Replies
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    3,807

    The problem is you cannot get all of the reading...

    The problem is you cannot get all of the reading for all brands you service. Like you said, even amana has several different types of igniter, and they have different resistance, and sometime even...
  20. Replies
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    2,419

    amvm is also a modulating furnace if works with...

    amvm is also a modulating furnace if works with the series communicating tstat, amana said.
  21. Thread: Melted CSST!

    by vibration
    Replies
    10
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    837

    Does the csst touch the water tank c vent?

    Does the csst touch the water tank c vent?
  22. Replies
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    1,086

    If it requires 2.5" and you put 3", will it cause...

    If it requires 2.5" and you put 3", will it cause problem?
  23. Did you check the flame pattern? This happened to...

    Did you check the flame pattern? This happened to me once. when I looked at the flame, one burner flame was different from the others, smaller flame. Removed manifold, found spider nest in that...
  24. Replies
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    2,857

    Customer replaced tstat, no heat. Found the tstat...

    Customer replaced tstat, no heat. Found the tstat energized everything, heat, cool, fan when it called for heat. Not a heat pump tstat.
  25. Replies
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    My question is how cold was inside your house...

    My question is how cold was inside your house last year? What was your tstat set at? Maybe your old furnace had some problems so it could not keep the temperature in your house, not because the...
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