Only permanent magnet motors reverse direction when the polarity is changed. Your heater blower will continue to turn the same direction regardless of polarity. Ditto for the starter. You will need to repolarize the generator.
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!