William B New Haven , CT March 10, 2023 Appliance: Whirlpool Electric Range RF390PXPW0 Whirlpool Range Rf390pxpw0: The dials on stove could no longer be read. How to replace Range Knob Set (Includes 9 Black Knobs). We replaced the Range Knob set. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes