On some ovens Whirlpool uses a spark electrode very similar to those used on cooktops. This system may fail and result in low temperature complaints. There are several solutions to this problem. First is a new electrode; make sure that the burner is firmly grounded.
2. Whirlpool also has redesigned the burner with more holes to better light the flame.
Sparker Style Burner
3. The last solution is a new circuit board that creates the spark.
Sparker Board