Whirlpool Built In Oven

Oven had fault codeo of F3-E1 after self cleaning cycle and elements not heating. Ordered part # 9759243, Thrmst-fix and replaced on back of oven. Fault code went away and 2 days later I have a fault code of F3-E2. When bake is selected 350 degrees shows on display but when you try to adjust it, it only goes down, even when selecting up. Do I have a defective thermostat that I installed or is it calling out something different.

Thank you for your assistance.

Gary