Confused

Have oven that went to self clean and had to unplug to release (let it cool). Oven / broiler not working. Control board or temp sensor or something else?

Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=mer5755qaw

See the attachment for the tech sheet

Not quite sure I understand.
If the unit went into self clean all by itself you will need a control (item 7 in section 03).

By the sound of it the hi-limit switch may have blown.
I think it is item 18 in section 01. If you click on it’s picture a new page will open with a view of the back. Looks like it can be reset by pushing the read button back in.

It would also be a good idea to check the oven sensor.
Below is a link, check out 7, 8, 20 and 21.
http://www.applianceaid.com/electric-range-repair-topics.php