You may be able to solve your problem by installing a “garage kit,” a heating coil to warm the air around the thermostat. The warmer air makes the compressor run longer and keeps frozen food, well, frozen. Check with the manufacturer to see if it makes one for your model.
But before you shell out $20 for the kit, consider how much you’ll have to spend to keep your brews chilled and pizzas frozen in the summer. Your old fridge is less efficient than your new one, so it’s already costing you more to run. Add 25 percent to run the old clunker in an 80-degree garage. Then double the bill if it’s running in a garage at 90 degrees and up. Are you sure you want to pay that much just to save a trip to the kitchen?