Anyone has had problems with heating of Frigidaire double oven?

SOURCE: older Whirlpool RB170PBX both ovens out

We have an old Whirlpool oven, and the lower heating element is no longer heating above 250 degrees. Is this heating element something that can be pulled out -- like the stove burners can be pulled out of electrical sockets -- or is it attached to wires, requiring an electrician to replace the unit?

SOURCE: heating element will not heat

With all that you said, I would suspect an open or faulty element. It is pretty much the most obvious solution.

If you have any electronically ability and you are going to open the oven, use an ohm or resistance meter, check the amount of ohms and use the upper element as a reference for the correct reading.
The element will either read open or good. You can use a light tester also and if the light lights between the two connectors of the elements, then it is ok and look elsewhere.

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SOURCE: fridgiaire Gallery series Model GLEB30T8CBA lower elements dont work

I replaced the relay board for the top oven (the one with the transformer) and it works properly now. My issue was only for the top oven so you probably have to replace both relay boards since both ovens have only the top element working.

318022002 is the part number for the relay board with transformer
318022001 is the part number for the relay board without transformer

Yes the one without the transformer is more expensive for some reason.

The boards are on the top of the oven, I was able to pull out the oven about 75% of the way out of the cabinet and easily get to the boards. Just unplugged the connections and plugged them into the new board.

To get the oven out there are two small screws that go into brackets inside the top oven door. Highly recommend taking the doors off the oven to pull it out, much easier to work with.

NOTE: On my old board I noticed one solder joint that was burned out and I since I already had the new board I just replaced but you might want to check that first and see if just a solder fix gets you working again before you spend $$ on a new board.

SOURCE: Element in top oven not heating up all the way.

Yes needs a new element.they burn out. easily.you know this because they sell them seperately.its there way to make money off of you.anytime they sell you something and the parts are readily available especially sold seperately you know its going to need to be replaced eventually..If you replace 1 replace them all to avoid furthur issues.

SOURCE: Oven doesn't reach temperature setting

It could be the plug/receptacle that the element plugs into. It could also be that the elements have separate thermostats and that the one for the lower element is bad. If you can post the model number I can look at the electrical schematic and know for sure if it has one or two thermostats.