The air can get pretty hot due to compression and the hot compressed air will be in contact with the blower fan, which causes the blower to get hot.
The motor also produces heat and the heat needs to be removed by the airflow.
More compression causes the air to get hotter and reduced airflow reduces the heat lost from the motor.
You should check the actual pressure and make sure that it is not over the pressure limit described in the blower manual.
You can use a pressure gauge, a manometer or a piece of vinyl tubing to make a test rig.
The motor also produces heat and the heat needs to be removed by the airflow.
More compression causes the air to get hotter and reduced airflow reduces the heat lost from the motor.
You should check the actual pressure and make sure that it is not over the pressure limit described in the blower manual.
You can use a pressure gauge, a manometer or a piece of vinyl tubing to make a test rig.