How do i remove the bottom element of my frigidaire oven

Your wiring diagram and parts schematics are here in the link below. Normally the bottom element does glow read hot after a couple of minutes. Broil elements last a lot longer because they aren't used as much. There is only one Control Board. If I was guessing, I would say the temperature sensor is at fault. Elements either work, or they don't, but you can easily test continuity with a meter. Many parts are discontinued.

https://www.searspartsdirect.com/model/3f7nkrfnvp-001428/frigidaire-pleb30t8ccb-electric-wall-oven-parts

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Most likely relay on board for that element is defective

Sounds like the bake element is out. Remove it and test it for continuity. If you need further assistance please feel free to contact me.

this should show you how to change it

You-Tube video "pEhRqdvpiJM" placeholder (do not delete)

The main fault when the oven is not heating is that the element has blown here is a video on how to change your fan oven element and the motor.
For all your fan oven element click here

You have two elements turn on the broil and see if the top element comes on if it does replace the bottom element.

Most elements are mounted to the back of the baking chamber from the outside and held in place with brackets that are screwed in place. Turn the BREAKER off, & after taking the back off you should find the wires are wire nutted together.

replace the upper oven calrod element it is an easy job just unplug the range turn the range around remove the back plate loosen the element wires from the element remove the element from the front any parts supply will have your replacment part such as www.applianceparts.com

If the elements are good and you have checked the obvious connects etc. then it would seem to be the control circuit.

Hello the first thing you do is unplug the stove before doing anything ,open the oven door remove 2 screws holding the element to the back wall pull element forward remove wires with insulated pliers attached to the element ,reattach wires to new element resecure to back wall and test. good luck

if you feel through the insulation you can find the two wires that attach to the element pull them through to plug the element back on but there is no plug per say but first are you sure the element is good were there no wires on the element when you removed it should have been two spade connectors with wires on them attached to the element hold my rating till you reply