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Window Air Conditioner Freezing Up, Will Portable AC Do the Same?

Discussion in 'Indoor Growing' started by Critical420, Nov 13, 2017.

  1.  
    chemphlegm

    chemphlegm Well-Known Member

    yes, it sucks to see your ac cycling in the middle of winter grrrr.
    I tried using the outdoor air and was nothing but troubles for me, costing much more than sealing it up and running an ac full time if needed. humidity, mold, condensation pissed me off.....My ac costs are less than my heat costs, combined year round with my dehuey even average less than 125$ a month, I'm doing something right in my 12x 40 outdoor building room. its all 220, 2 baseboard heaters(veg/flower), a 12kbtu window shaker, no exhaust or intake in the room(s) but they do share air with each other.
     
  2.  
    innerG

    innerG Well-Known Member

    Doesn’t your window AC have a ‘fan’ function that blows in outdoor air without running the AC compressor?
     
    chemphlegm likes this.
  3.  
    Huckster79

    Huckster79 Well-Known Member

    That’s interesting, I would have thought once cold out winters are usually pretty low humidity besides warm wet snow type days- you’ve given me pause that maybe my ideas not a good one.... maybe I will just add another duct booster to my ac unit to pump the warm air where it would be useful in the House... my window shaker is in a box with a duct booster and ducting to take it out of my work room area into general basement as it got sweltering in there with it direct discharging in my work room. If I ducted it maybe to my cold crawl space would warm the floors up at least...

    So you think bringing in outside winter air brought u mold? Man I’ve never had mold not sure about this now...
     
  4.  
    Lite

    Lite Well-Known Member

    freezing does not come from the drain line. while it can freeze the drain during the winter, that is very different than the copper refrigerant lines freezing
     
  5.  
    chemphlegm

    chemphlegm Well-Known Member

    yes, I think they all may. mine is always in the closed position. I dont want the outdoor air spoiling my prime indoor air anymore
     
  6.  
    chemphlegm

    chemphlegm Well-Known Member

    exhausting warm humid grow space air into cold spaces like attics and crawls could result in molds.
     
    brewbeer likes this.
  7.  
    chemphlegm

    chemphlegm Well-Known Member

    sure, but now you know the winter temps here, as my bucket is frozen.
    the only issue I've ever had (and I have heard of your mentioned one too, but dared it here successfully) was the water in the catch pan freezing, and/or inhibiting the fan blade. no other problems have arose since 2008 of the same. I immediately put a light under it, that worked for awhile till I got around to a nice drain with heat tape/thermostat for that pan.
    no unusual power draws, no issues, knock on hash.

    now we know its frozen water weather.... why is it still functioning so well for me?
     
  8.  
    Lite

    Lite Well-Known Member

    u must have a variable speed which was significantly more expensive Than a cheap one, or you are slugging the compressor with liquid refrigerant and it's gonna die prematurely, or u have a really high heat load getting pulled out that's keeping it from freezing
     
  9.  
    Lite

    Lite Well-Known Member

    "exhausted" air should only be 20ish degrees warmer than ur tent temp. in winter this won't cause growth unless ur shoving the air into something porous. the air should be extremely low humidity.
     
  10.  
    Lite

    Lite Well-Known Member

    you're more likely having suspicion issues when the snow on your roof melts faster than ur neighbors.
     
  11.  
    Gquebed

    Gquebed Well-Known Member

    It froze not because of outside temps. It froze because it was working too hard.
     
  12.  
    chemphlegm

    chemphlegm Well-Known Member

    I have a grow building, I'm in the woods. I exhaust into an unfinished area of the steel building and carry that warm humid air out to the gable vent so far my roof stays solid snow on the barn, even over the top of the growing area. its wrapped really tight inside.


    I have noticed some inefficiency when its really hot in the exhaust area and I'm cooling the grow space, but not when its cold in the exhaust space. I never measured temps in the exhaust area but buckets of water freeze solid in there on the dirt floor.
    my unit was 550$, near 7 years operating, I watch my digi power draw on it every time it cycles. I've got an app with a separate smart meter on the grow space, is variable speed also you're right.
     
  13.  
    chemphlegm

    chemphlegm Well-Known Member

    what froze?
     
  14.  
    Lite

    Lite Well-Known Member

    variable speeds are better for cold ambient because they will decrease the condensing fan speed in order to keep the head pressure up on the unit. your easiest fix for the drain is to have it drain into a condensate pump directly beneath the unit and run it through vinyl tubing inside.

    or have the drain line drain onto a bucket of salt
     
  15.  
    Lite

    Lite Well-Known Member

    ignore that
     
    chemphlegm likes this.
  16.  
    chemphlegm

    chemphlegm Well-Known Member


    funny you mention salt.....
    my ac pan is wrapped once with heat tape on a thermo. the water runs through the hole into a pvc pipe that intersects with the drainage from the dehuey then to the outdoors into a dry well filled with salt. (buried upside down 5 gallon pail) I cant fix that, it aint broke lol
     
    Lite likes this.
  17.  
    Gquebed

    Gquebed Well-Known Member

    I ran a 10,000 btu window a/c in a 5x9 with 2x1000w hid. It was on almost all the time cooling that space, as the lights were not air cooled. This was in my basement. The unit was not half outside. I cooled the basement with exhaust fans.

    Anyway, One day i came to check the girls and the ac unit was frozen...front grill and back. Was still running...lucky i caught it. ​
     
    chemphlegm likes this.
  18.  
    chemphlegm

    chemphlegm Well-Known Member

    you exhausted your ac into the same space you'e cooling and the unit froze? am I understanding this correctly?
     
    Gquebed likes this.
  19.  
    Gquebed

    Gquebed Well-Known Member

    No.
    My 5x9 "tent" (homemade) was built with a "window" opening for a window ac. Cooling side cools in the tent, with the ass end just hanging out exhausting into the room that my "tent" is in. That room is exhausted by a fan to outdoors using a temp switch. The room stays at 68f...while the "tent" ranges from 78f to 68f lights on to off.
    If the window ac runs constantly it will eventully frost on the tent side. Oddly enough it frosted on the exhaust side too...not sure why. Was a band new unit...

    Anyway... the lights are now air cooled and the ac unit works intermittently as it should.
     
    chemphlegm likes this.
  20.  
    Lite

    Lite Well-Known Member

    freezing is caused by:
    refrigerant leak, which for window units means u buy a new one

    low airflow (if it gets super dirty or if the fan stops working)

    restriction in refrigerant system (shouldn't happen unless u physically bend something)

    low temperatures indoor or out causing pressures to get below a 32degree saturation temp. temps go down, pressures go down.
     
    Last edited: Nov 14, 2017
    chemphlegm likes this.

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