GE Profile Range - Oven now heats VERY slowly

[DIY_Hopefully]

My GE Profile Electric Range model JB910B LGSS recently started heating the oven VERY slowly. It seems to reach temperature (at least to 400 degrees) but takes nearly 1 hr. There may have been some food that spilled into the convection fan in the back, causing a spark. Any advice most welcome.  The element is not visible so any links to access the element also most appreciated.  Didn't want to replace the element if it might be something else, considering it does heat up - just VERY slowly now.

[Akshesh]

Check this video similar to your Range. 

Also, I see attached exploded view of parts. But please double-check as this is for the closest model number match.

Check 4 parts mentioned below for this issue: 

1) Bake Element

2) Broil Element

3) Oven Temperature Sensor

4) Oven Control Board

[Alanna Farrell]

A slow-heating oven like your GE Profile JB910B LGSS often points to a failing or partially working bake element—even if it's hidden and still producing some heat. Since it eventually reaches temperature but takes unusually long, the element may be damaged or not getting full voltage due to a weak relay, faulty sensor, or control board issue. That spark from the food spill near the convection fan could have caused shorting or internal damage. Start by checking the bake element continuity with a multimeter (you’ll likely need to pull the oven out and access it from the back panel). If the element tests fine, the temperature sensor or control board may be the culprit. A full visual inspection behind the rear panel should reveal any obvious damage or disconnected wiring.