What does the 5A6 code mean on my frigidaire stove?

SOURCE: Frigidaire Electric Range ES200/300

there is sometimes a thermal fuse inside the caseing might have to take the top off if not then you will need a new timer be safe and unplug

SOURCE: What does F10 display on my stove mean? Frigidaire Model PGF355DS

my frigidaire oven keeps flashing f10 and turning off

SOURCE: Frigidaire ES200/300 316257123

look for a shorted bake element .. you should be able to see where it poped. ( some times ) if you have ohm meter you can ck for an open element . **** //

SOURCE: Simpson Apollo can't set clock so oven won't work

I don't know if this will help. For the 720ef , this is what you need to do.
There are five buttons on the clock panel and from left to right they are:- Minute Minder, Cook time, Ready Time, Plus and Minus.
TO SET THE TIME OF DAY
Press the Cook Time button and the Ready Time button simultaneously. Use the Plus and Minus buttons to set the time.(24hr clock).
TO SELECT AN ALARM TONE.
Press the Minus button to listen to the first tone. Release it and press it again to listen to the second tone etc (3 tones)
Releasing the button after the tone has sounded will automatically set that tone.
SETTING THE MINUTE MINDER.
Press the Minuter Minder button and either the Plus or Minus buttons simultaneously to set the time.
You can cancel the timer at any time by setting it back to 00.00 by using the Minus button.
After setting, the display will revert to the time of day, but by pressing the Minute Minder button again, the display will show the remaining time.
If you want all the information, then it is best if you supply a vaild email address and this will give you access to my BT Digital Vault, where you can have a complete copy of the handbook that I have scanned in.

SOURCE: Frigidaire gallery stove, oven not working,

Morison,
The same thing happened to me about a week ago. I was preheating our electric oven, heard a very loud bang/pop. Checked and the oven had PF (power failure) I went downstairs and the breaker was tripped. Came back upstairs and to look at stove, the burners are working fine so I continued to preheat oven after a half an hour the oven was only slightly warm. Did you ever find out what was wrong?