December 2, 2013 at 9:47 am #19355
We’ll I have built my bar and it looks great….but as commonly posted, can’t get the keg box cold enough…I have a haier 2.7 ,……freezer plate has frost and a used a temp gun and measured that the frost plate at 27…fridge is brand new but doesn’t have exposed coils. I used pro pink insulation around box with great stuff….bottom has 3 inches of pro pink. I have a small desk fan blowing on the back to keep compressor cool and I have a PC fan in the keg box to circulate…door was done according to plans and I used window latches to seal it shut….coldest I got down to was 41……not sure what I did wrong but I am running out of ideas and don’t want to rip out fridge and destroy what I have done thus far .air flow around outside fridge..or lack thereof..is only issue I can think of as it is enclosed and not a lot of room around it. Can also add more fans but don’t want to keep throwing money away as it seems others got it much folder with less.. Today I added more insulation inside bit didn’t help…moved fans around …didn’t work….please help a noobDecember 4, 2013 at 11:07 pm #21077
where and how are you measuring your temp?
hopefully not with the door open using the raytek.
I suggest a wired digital thermometer. I just fired up my 10 year old keg box the other day and it went from 68F to 34F within 2 or 3 hours.
If you have frost, that is key, now you have to move more air. It will also take some time and of course, keep the door shut.December 4, 2013 at 11:53 pm #21078
I think the key here is in this statement:
“doesn’t have exposed coils. I used pro pink insulation around box”
Basic refrigerator theory: Cold plate inside the fridge extracts or ‘compresses’ the heat. That heat needs to go somewhere to be dissipated to help heat the room – that somewhere is the coils. In your fridge, the hot coils are just under the skin of the fridge. It is much cheaper to manufacture this way. If you take a look at the pictures from this thread Mini Fridge Disassembly you will notice the coils.
What you did by putting the insulation over the coils is you did not give the heat anywhere to go. In fact, the insulation you enclosed it in is likely better than the insulation in the fridge – this means the heat from the coils is more likely to enter the keg box than escape it. You are cooling and warming the box at the same time!December 5, 2013 at 10:34 am #21079
sbone is right…but hopefully you did not surround the fridge with pro pink because that is not how the plans show it. You insulate the keg box and up to the front face of the fridge. a good seam of spray foam is all that is needed, but certainly not the whole body of the fridge.
The fact that you have frost on the freezer plate is a good sign though.
Take some ray tek readings on the outside surface of your fridge unit. I would expect it to be considerably higher than ambient. If so, that’s the heat you want to get rid of.
It looks like in these newer units, they place the coils right against the outer metal skin and use that as the heat sink. Great link & photos!December 7, 2013 at 12:11 pm #21080
Thanks for help and comments….for reference …I used a digitital thermometer through keg hole while door was shut..fridge ran all day and never turned off….also, I only pro pink in front per plans.. Not around fridge itself…bottom line I think it is the fridge since coils are inside but I found an old one with coils in the back so I am biting the bullet and swapping out fridge…in the end I think this is my problem and I will hopefully have more positive results with this fridge installed..while plans are affordable and it is a cool project…the type of fridge I think makes a big difference and since they don’t make mini fridges with coils in back…plans should address this….thanks for pics and comments…more to comeDecember 8, 2013 at 9:24 pm #21082
Happy to report…box is now at 33 in only hour and half….fridge w coils in back was problem plans should put a disclaimer on this as I think it solve 90 per cent of non cold questions. Fan inside also helpedDecember 21, 2013 at 9:25 am #21090
happy to hear you got it sorted out. The new compact FREEZER units are said to work even better. Haven’t tried one yet myself. Cheers!
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