Protector

The overload protector is a safety device, but when it becomes weak it turns into the problem. You’ll see an ice machine that starts normally, begins cooling, then drops out after a few minutes. After a cool-down it restarts, so the complaint bounces between “not cooling” and “not turning on,” depending on when you arrive. A weak protector can open with normal amp draw, especially if the contact surface is oxidized or the bimetal has fatigued from past overheating. Customers often report it as “works for a bit, then no ice,” because the compressor stops long before the bin refills. Rule out legitimate overheating first: verify condenser cleanliness, fan operation, and correct charge. Then focus on the protector itself check continuity when cold, and watch how quickly it opens under normal amp draw. A protector that trips below rated conditions or has heat-damaged terminals is a common culprit after repeated high-head events or voltage issues. Record run amps before the trip; if they’re normal, overload protector 1858451100 is likely nuisance-tripping rather than responding to a real fault. Replacing the overload protector solves intermittent shutdowns by restoring the correct trip curve. The compressor can run continuously through a full freeze cycle, pressures stay stable, and the controller stops throwing nuisance faults caused by unexpected power loss to the compressor circuit. Also inspect the compressor terminal cover for heat damage poor connections raise temperature and can trigger protectors prematurely. After replacement, verify compressor amps are within spec and confirm the unit completes several freeze/harvest cycles without opening the protector. That final run test is what prevents a repeat callback. After the repair, verify the machine completes a full freeze and harvest without dropping out, eliminating “not cooling” complaints tied to shutdowns.