Richard H Madison , TN December 22, 2014 Appliance: Whirlpool Electric Range RS630PXK0 Whirlpool Range Rs630pxk0: Numbers were worn on bezels. How to replace Dial Thermostat. Took off knobs, removed one screw from each, and installed new ones. Very easy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes