DIAGNOSIS Some heat is normal—that's the motor and gearbox area. But excessive heat quickly usually means you're overworking it or there's a lubrication issue.
FIX First, check your technique. Are you applying too much forward pressure? Let the impact mechanism do the work; you just need to guide it. Pushing too hard creates friction and heat. Second, ensure you're using the right bit. A worn or low-quality bit will slip in the screw head, creating massive friction and heat that transfers back into the chuck and anvil.
IF THAT DIDN'T WORK If it's getting hot during normal, easy use, the grease in the gearbox might have degraded or leaked out. This requires disassembly to regrease, which isn't a simple user service.
HEADS UP If the tool is too hot to touch or you smell burning, stop immediately and let it cool. Continuous overheating can permanently damage the motor windings or plastic components. This model doesn't have a thermal overload protection circuit like some larger tools.