Remove the oven door from the stove by opening the door and lifting the over-door hinge out of its connection.
Clamp the handle to the oven door where you want it.
Insert the tungsten rod into the collet, the nozzle at the end of the welder, by opening the back of the collet.
Turn on the argon gas of the tig welder box.
Put on your welding mask and gloves.
Hold the collet in your dominant hand and the filler rod in the other hand.
Weld the handle to the oven door by heating the filler rod with the tungsten, which melts it. When it cools, a second later, it melds to the handle and the oven door securing them together.
Smooth the weld with a sander without sanding away the entire weld.
Paint the weld with metal paint that matches the oven.
Replace the oven door.