On the lowest speed, it's not uncommon for the resistor coil to get red hot. Later model speed reducing resistors were incorporated into the airflow of the heater housing to keep them cool, plus put them out of reach to prevent burned fingers on nosy people!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!