William J Santa Fe , NM January 01, 2024 Appliance: Frigidaire Electric Range GLEFS77CSC Frigidaire Range Glefs77csc: F1 error code: This means control board failed. How to replace Control Board And Clock. Watched demo video on your site. Ordered replacement controller. Methodical dis-assembly. Don't drop the screws into the stove! The new controller did not have a new fascia plate so I had to remove the original one from the broken controller. It's held on by tacky glue. Came off mostly OK but lost a few patches at edges even though I peeled it off very slowly and carefully. I needed a square bit to get machine screws out and a Phillips screwdriver to remove the original controller. Needle nose pliers are also useful. Here's a good tip: take a few pictures of the wiring from different angles BEFORE you dis-assemble the controller. This will allow you to connect up the controller correctly. Most of the challenges were in moving the stove out from the wall and the adjacent cabinets. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes