I have a small 1250 btu McCall under counter two door reach in. Uses a 1/3 hp compressor & R404. Our restaurant manager at this location asked me to fix it to be a cooler for coffee creamers, beer glasses, etc. I think this unit has a small refrigerant leak too. But I haven't pressure tested it yet or took a real hard look for a tiny leak. I think I added a very small amount of 404A five months ago but now it's running high temps.
What's the opinion here? Can this unit be re-sized for med/high temp use using the same compressor, a new properly sized cap tube, dryer and a new thermostat & possibly converting to R134? This is pending I can find a repairable leak if it fails a n2 pressure test. I was think a Ranco constant cut-in A12-701 for a stat inserted into the evaporator. Also, the cost of labor is not a big consideration. This company hates buying new equipment.