Harry A Tucker , GA June 23, 2014 Appliance: Frigidaire Range GLEFM397DBB Frigidaire Range Glefm397dbb: F5 error code. How to replace Clock Timer. I followed the video instructions on your website. Directions were easy to follow. I gave you an excellent alaroud rating on the Google survey. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes