The oven will not heat up the broiler on top works but bottom burner won't come on also having a hard time finding the serial or model #
Test for 3.2-3.6 amps at the gas safety valve with the igniter turned on. If the voltage is there, you have a bad safety valve. If the voltage is low, you have a weak igniter and the igniter will need to be replaced. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
Before the oven comes on I hear a big bang or POP.
Answer Hello Ralph. Based on the information you provided, it sounds like the igniter WB2X10016 is weak and will need to be replaced on the unit. This will cause the unit to not ignite quick enough and cause a small explosion in the oven.