Over the past few weeks my kegerator chest freezer has started running more and more, and the past few days it's gotten worse, to the point that the compressor is running about 3/4 time just to hold it at 7°C. There's also ice forming over the coils in the corner furthest from the compressor. I'm assuming that means it's low on coolant, but these are sealed systems, so that means a leak, right? So even if I can find it I don't have the equipment to recharge it with coolant. Any other potential solutions?
I've had it about 11 years so I'll probably just end up taking Lowe's up on their free delivery and haul-away, but I figured I'd ask if there's anything worth trying in the meantime.