Goodman GMS90703BXA Heater "status light blinking red filter" Questions

...status light 4 times blinking I have 1993 goodman gas furnace. the furnace is blowing with cold air. no flame. the thermostat is running on battery. the status light on goodman is blinking 4 times. ...

...status light blinking 4 times (red). The furnace door indicates: 4 BLINKING RED - OPEN LIMIT SWITCH -- AUX LIMIT OPEN/ MAIN LIMIT OPEN. I don't know what to do next. I do know that when ever the ...