Alright so I was proud of myself for finally building my fermentation chamber. Much needed after freezing the entire apt with a/c for nearly a year. I've attached a few pics for reference.
Its a 33"x28"x24" block. Simply made with 3/4" insulation, toothpicks, weatherstripping, and duct tape. Nothing too fancy since I didn't intend to make anything permanent. I was hoping to cool it with the 2.7cuft mini fridge, plugged into a programmable thermostat, with a small fan to circulate. Initially it looked promising as the temp dropped a few degrees within 20-30 minutes or so. Ambient temp in the room was 73-75. Well after about 2 hours the fridge was still on constantly, a quick check showed it was still only around 67. I opened it up, and moved the thermostat to the floor in hopes that it was the rising hot air causing the issue.
Let it go overnight, wake up and its still at 67 (10 degrees from the ambient now). Fridge on, ice building in the freezer. I'm calling it a fail right there. After work today still the same temps. The fridge is pretty silent in comparison to what it normally sounds (I could be making this up). When I unplug it there is a trickling sound that doesn't go away.
I figure I blew the compressor or something either by having it insulated poorly and the fridge running constantly. Or from tipping it a little while moving it (not completely just on an angle). The inside walls of the fridge are warm. But the freezer portion is frozen and no water has dripped down so I'm not sure. I guess I'm confused because i've seen a few work bench chambers using the small cube mini fridges.
I checked all the edges of the insulation is. There is duct tape over every seam, and weatherstripping along where the top meets the sides. With everything closed I can't feel any hint of cold air from any of the seams. The only real issue I can think of is the bottom is carpet. But can that really suck out that much cold?
So point out all my issues. Not enough insulation? Is it okay and a 7-8 degree drop is all I can expect? Did I kill my fridge? Kind of disappointed. Not only do I still not have a ferm chamber, I lost my beer fridge, and my A in heat transfer now looks pathetic.