[PAR_WIG1350]

Does it smell like burnt plastic or ozone? Brushed motors often produce a certain quantity of ozone in normal operations, but burnt plastic is a sign of potential trouble.
Does it still run? If so, it might be partially burnt out in which case it will run but will have lower performance, or it might have started to get hot but the insulation could have survived in which case the motor should still perform normally but there is a chance that the life span of the motor is decreased.