Here are your parts
Replacement parts for WHIRLPOOL RBS305PRQ00 | AppliancePartsPros.com

Here is a tech sheet
https://www.servicematters.com/d...0Sheet%20-%208301758.pdf

Be sure to unplug the unit when working on it 240 volts is lethal

You will see that the unit has a thermal fuse (Item 37 in the "oven parts" section. I would check that first with a meter, should be closed at room temperature. You could measure this at the control board back through the bake or broil element. Should be 5 to 15 ohms if measured this way.

If you do not own a meter, I would suggest you purchase a one. You can get a decent digital multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.
If it saves ordering one unnecessary part it has paid for itself and you end up owning a useful tool.
Most places will not let you return electrical parts so if you order it, you own it.
A couple things to watch when measuring ohms and continuity
1. Always remove power from the machine otherwise you could blow your meter.
2. Always disconnect at least one side of any device you are checking. This eliminates the possibility of measuring an alternate/parallel circuit path.
3. When checking for closed contacts and continuity use the lowest scale (Usually 200 ohms). Then try higher scales. This scale is 0 to 200 ohms so if the device you are measuring is 300 ohms this scale would show an open circuit which it is not, you are just measuring outside the scale's dynamic range.

There is a good STICKY at the start of this forum about it's use.

your control might still be covered, check your papers that come with your oven.