LG LST5651SW stove: oven not heating properly

[Curious808]

LG LST5651SW stove: The oven has a hidden bottom (bake) element that seems not to be heating up, but tests OK.

PROBLEM DESCRIPTION: Set oven to 400. The display shows it heating up normally to about 365, and stops there. The top (broil) element is visible and heated. Can't see the bottom element, but the bottom of the oven isn't extremely hot. A wet cloth on the bottom doesn't sizzle and doesn't really heat up. The stovetop burners seem to be working fine.

TESTING SO FAR:

1) Removed the back panel and leads to the bottom element. Using multimeter, continuity test is positive (continuous tone). Ohm test reads about 16.5 ohms; the product sheet says it should be 17 ohms.

2) Removed the sensor for testing. Plug openings too small to fit multimeter probes, so inserted wires into the back of the plug where the sensor wires go in. No continuity tone, but ohm reading is 1,100; product sheets says it should be 1,090.

It seems the bottom element is not heating, but is OK. Not sure why the sensory continuity test fails, but the ohm reading seems OK.

Any idea what to do next? Thanks!