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First go get a ton of stainless steel sheet metal screws - about 20 phillips head and 20 nut driver. a drill with a phillips bit and a nutdriver bit and a zip tie and a phillips screw driver and a socket and an extension bit.
Second - unplug your stove, turn off the gas valve on back of the stove and pull it away from the wall so you can access the rear easily.
Third -Put on a head lamp and some clothes that are going to get oven stuff on them.
Removed Racks from lower stove, then removed the bottom of the stove, in my oven there are two nut drive screws in the back holding it on so you have to unscrew those in the back of the oven.
Attached to the bottom of the oven is the inplace deflector and Deflector oven kit. If it's anything like mine the main shield melted and dripped onto the glowbar which caused the problem. Unscrew this setup from the bottom of the oven. Throw it away. Assemble the new deflector to the deflector oven kit (no screws supplied). The new deflector oven kit has a cutout above where the ignitor glow bar goes so it doesn't melt and drip on it again. Make sure the cutout is going to be positioned over the glowbar when the bottom is reinstalled. Now go to the back of the stove and remove the steel cover on the bottom left of the stove that is covering some wires that come out of the bottom of the stove. Under the cover is the little plastic electrical connector that has the glow bar wires running to it from the back of the stove. Unplug this connector for the glow bar. Now go back to the front of the stove and remove the metal cover in the back of the stove that covers the hole the glowbars electrical stuff goes through, it has a bunch of nut driver screws. Once that shield is removed take out the old glowbar by unscrewing the glowbars protective metal mount from the stove bottom and pulling the connector through, it's tight through the hole and some insulation may come out so salvage that if you can . Now install the new glowbar by shoving the wire through the hole. Now plug in the new glowbar and zip-tie the wires up nice and replace the protective shield on the back of the stove. Now go in the front of the stove and mount the new glowbar with new stainless screws. Then mount the electric wire cover. then replace the bottom of the stove then the racks, then plug it in, then turn on the gas, then cook.