reverses the furnace circuit and A/C
you mean the blowers run backwards ?
assuming you use the same shore cord for BOTH generators
and don;t have some home made adapter that is crossed wired
return that generator NOW.. do not use
something is seriously wrong, it is impossible for 120v shaded pole motor to run backwards on CORRECT 120v power especially since they work on the big generator, to run a motor backwards, normally requires switching the phase of the wiring, single phase motors have to have extra windings to run backwards and cant run backwards if not wired for it
this generator is faulty and dangerous
this is not a plug or neutral bond problem