yes and no as the micro switch is operated by the external button.
to confirm it is the switch, listen up close as you press the door button and you should hear or feel the quiet click of the switch operating. compare the noise and feel to the other door and see if there is a difference. if one clicks and the offending door doesn't then i would say that it is the switch.
to locate it , remove the door card and the interior plastic trim at the rear of the door button. watch you don't damage the thin rubber sealing tape which is at the top of this trim . you might be able to repair it if it has no corrosion but it's more likely to be scrap. the switch is held in place with a small plastic retaining pin so make sure you don't lose or break it .
all the best, dave.