Trouble with a Maytag Range model MGR8772WS1..heating irregularities

[AWSHandy]

I thought I had this one fixed.  The old problem was the oven "bake" ignitor would come on, the burner would fire up, then when it got up to heat, it would shut off after awhile and not come back on.  So, I thought new ignitor and temp sensor should solve it.  It did, for a short while.  After the temp sensor and ignitor were installed, tested bake to 350 deg.  It went up to 350, beeped, and burners shut off.  I opened up the oven door, let some heat out and then closed it.  Sure enough, the ignitor glowed and the burner fired up again.  I did this several times.  NOW,  the oven does NOT get up to heat, it only goes to about 200,  then shuts off.  I am scratching my head as to what is going on.  Is there a thermal fuse I am overlooking?  Any help appreciated.

[isaac]

Sadly sounds like the main board is failing,  i have had this symptoms a few times,