goodman outside ac fan on. inside blower motor only manually turns on

a awhile ago a/c and heat quit working . changed thermostat and it clicks for furnace to turn on and a/c . outside a/c turns on but only way to turn blower on is in manual on thermostat. have a goodman model gun075-3 its a 1989 . also this winter the heat would run a few cycles then nothing. i could get it to run if i turned power off to furnace for a few minutes then turn it back on. any help would be appreciated. i just need to a/c to run for the summer then im getting a new furnace a/c thanks