F1 is a control error code . which means the clock / control has to be replaced.
The link below is to the part you will need from a highly recommended company rated A+ with the Better Business Bureau. They offer a 100% money back guarantee, EVEN ON INSTALLED ELECTRICAL PARTS, for an entire year! They are the only company to allow returns on installed parts for a refund and offer a FULL ONE YEAR WARRANTY!
click here for part info
ok you will need to take a metal clothes hanger and bend it into a L with the leg of the L put it between the oven door and the oven cabinet and you will need to start on the right side of the door and drag it to the center to hook on the latch arm and than pull on the latch arm to the left to unlock the door . you may have to bend it into a J so the little hook can grab the latch ,and open the door that way.