Motor Too Hot? - Tech Talk 11
"My motor is running too hot to touch. Is this a problem?"
The old "Too-Hot-To-Touch" test no longer applies, due to the improved materials now used in motor manufacturing.
The best way to determine if a motor is operating properly is to check the ampere (amp) draw. Each motor has a nameplate listing full-load amps (FLA). If the tested amp draw does not exceed the nameplate rating, its internal or external cooling fan is working (if so equipped), and the ambient air temperature around the motor is below 104°F (40°C). The motor is probably not running hot, even though it is too hot to touch.