Frigidaire Oven F9 Error Code: Door Lock Failure

The Logic Verdict: Door Lock Stuck

The F9 error code means the oven failed its self-clean door lock test. When the command went out to lock (or unlock) the door, the latch motor switch never reported back. The range’s control board refuses to bake again until it knows the door can lock safely during high-temp cleaning.

In the video, the tech exposes the lock motor, identifies the three-switch harness (Lock / Common / Unlock), and temporarily jumpers Common to Unlock so the board thinks the door is already open. That’s a clever workaround, but the permanent fix is replacing the worn lock motor assembly.

What It Means

The control board is expecting the lock motor’s limit switch to toggle within a few seconds. If it never sees the transition from Unlock to Lock (or back again), it assumes a failure. That stops all oven heating—even regular baking—until the fault clears.

Common Causes

• Failed Door Lock Motor: The gears strip or the motor stalls so the switch never toggles.
• Broken Switch Harness: Wires to the lock switch burn or fall off the spade terminals.
• Control Board Relays: Less common, but the board may never energize the lock motor, so it times out.

Step-by-Step Fix

Step 1: Kill Power and Access the Lock

1. Unplug the range or flip the breaker.
2. Remove the cooktop or back panel (model-dependent) to expose the door lock motor and switch assembly.

Step 2: Inspect / Test the Harness

1. Locate the three terminals labeled Lock / Common / Unlock.
2. Use a multimeter or continuity tester to verify the micro-switch toggles as you manually move the latch rod.
3. If the switch never changes state, the lock is bad.

Step 3: Temporary Bypass (Video Trick)

For emergency use only.

1. Disconnect the Common and Unlock wires.
2. Slide their female spade connectors together, insulating with electrical tape. This tricks the control into thinking the door is already unlocked so you can bake.
3. Warning: This disables the self-clean lock safety—never start a self-clean cycle while bypassed.

Step 4: Replace the Lock Assembly

1. Remove the two screws holding the lock motor bracket.
2. Transfer the harness to the new assembly.
3. Reinstall the bracket, plug the range back in, and test Bake. The F9 code should clear automatically.

If the new lock still fails, suspect the control board. Measure whether the board is sending 120 V to the lock motor during a self-clean initiation. No voltage = failed EOC.

Parts You Might Need

• Frigidaire Door Lock Motor Assembly (316464300)
• Frigidaire Electronic Oven Control Board (316557205)

Summary

1. F9 = door lock fault. The board refuses to bake when the lock switch misbehaves.
2. Inspect / jumper Common to Unlock only as a temporary workaround.
3. Replace the lock motor assembly for a reliable, permanent fix.
4. Swap the control board if the motor never receives power.

Parts You Might Need

• [Universal Appliance Repair Kit (Amazon)]