Yes, it's 110 when plugged in, but the cooling ...
element actually runs on low-voltage DC. So, inside the unit there is a power supply like a battery charger that is converting the 110 AC to some lower voltage DC. Now, all of this is based on the idea that what you have is a thermoelectric cooler. I just did a little web search, and Unifridge may have been built by the guy who started Koolatron, a notorious thermoelectric cooler maker.... Anyway, somewhere, there is this converter. the DC it makes is going to a small square plate gadget between the heat sinks on the inside & the outside. This little plate (usually about 1.5 inches square or so) is the actual cooling element called a "Peltier device". It's made of special semiconductors (diodes, actually) and can be damaged by voltage spikes, corrosion and mechanical stress. There may be more than one in your unit. Now, it it's working, the heatsink inside should really get cold and more importantly, the heatsink outside should get warm. I'd do the finger test, as close as you can get to the actual element on both sides. If you can't feel a definite warm/hot and cool/cold after the thing has been on for say 10 minutes, I'd say that either there is an internal fuse that is blown, a wire is broken, the device is zapped or physically damaged. If you have a voltmeter, then find the red or positive line into the thermoelectric device and check the DC voltage between there and ground. That may help you decide if the device is working. Have fun The link below is to a book by the koolatron guy and he mentions your frige's name.
