Step-by-Step DIY Fix Guide
- SAFETY: F40 / F41 cooktop lockout is not a safety emergency, but no burners will operate while active.
- Consult your model's user manual for the specific cooktop lock deactivation sequence — common sequences include holding the Lock or Off button for 3–6 seconds.
- If the lockout cannot be cleared with a button sequence, turn off power at the circuit breaker for 1 minute, then restore.
- If liquid was spilled on the panel, dry the control surface thoroughly with a dry cloth before restoring power.
- After power restore, attempt to use the cooktop. If F40 / F41 clears and elements respond, the issue is resolved.
If the door warning comes back
- If the door closes normally but the warning keeps returning, the latch or switch path becomes more likely than a simple alignment issue.
- F40 / F41 returns immediately after a 1-minute power cycle and the unlock sequence does not clear it
What This Error Means
Error F40 on your Frigidaire oven means: The cooktop surface elements have been locked out by the control system. F40 and F41 indicate that the cooktop lockout feature is active — no surface burner or element will respond to knob or touch inputs while this code is displayed. This is most commonly triggered by a control board detecting an unsafe condition on the cooktop, or by the cooktop lock feature being engaged. Also displayed as F41 on some Frigidaire models. The oven's self-diagnostic system has detected this condition and restricted operation.
The most frequent cause is cooktop lock feature activated — on some models, holding certain button combinations engages a lockout that displays f40 or f41. Work through the causes and fix steps below in order — many Frigidaire oven errors are resolved with a power cycle or a simple part swap.
Error F40 is DIY-safe. No special tools are required and the fix typically takes under 10 minutes. Follow all steps in sequence.
The cooktop lock on Frigidaire ranges is a child safety feature. Holding the Off button for 6 seconds is the unlock method on most models — check the user manual for your specific model number if this does not work.
Most Likely Cause by Symptom
The Frigidaire oven may stop, pause, or refuse to complete the cycle normally.
Likely cause: Cooktop lock feature activated — on some models, holding certain button combinations engages a lockout that displays F40 or F41
Check first: SAFETY: F40 / F41 cooktop lockout is not a safety emergency, but no burners will operate while active.
The warning may return immediately because the appliance is detecting an internal fault.
Likely cause: Control board has temporarily locked the cooktop due to a detected anomaly (resolved by power cycling)
Check first: Consult your model's user manual for the specific cooktop lock deactivation sequence — common sequences include holding the Lock or Off button for 3–6 seconds.
Common Causes
- Cooktop lock feature activated — on some models, holding certain button combinations engages a lockout that displays F40 or F41
- Control board has temporarily locked the cooktop due to a detected anomaly (resolved by power cycling)
- Spilled liquid on the control panel triggering a ghost input that engaged the lockout
What Not to Do
- Do not attempt to bypass the cooktop lockout — the interlock exists to prevent unintended operation and bypassing it creates a safety risk
Model and Display Variation Notes
Model-family notes
- Frigidaire oven display wording and code formats can vary by series.
- If your model behaves differently, check the owner manual before trying any deeper maintenance step.
- Some models may display the same fault as F40, F41.
Display and panel differences
- Some control panels show this issue as F40, F41 instead of only F40.
- Panel wording and whether the code appears with letters, numbers, or a longer variant can differ by model family.
Parts, Tools and Service Options
Common parts
- Main control board if lockout persists after power cycling ($100–$250)
Manual and model check
Check your exact model and manual before ordering any Frigidaire oven parts.
Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.
When Not to Keep Troubleshooting
F40 / F41 returns immediately after a 1-minute power cycle and the unlock sequence does not clear it
How to Prevent It Recurring
- Keep the control panel dry and clean — spills that seep behind the glass or keypad can cause ghost inputs that trigger cooktop lockout
Related Error Codes
LOCK
The cooktop control lock is active. All surface element knobs or touch controls are disabled and will not respond to input. Some Frigidaire and Electrolux models display a dash (–) rather than the word LOCK when this feature is active. This is a user-activated safety feature, not a fault — no component has failed.
LOC
The full control lock feature is active on the oven/range. All oven and cooktop controls — including the keypad, temperature settings, and timer — are disabled and will not respond to any input. LOC is a user-activated child safety lock and is not a fault. The oven will not heat and the cooktop will not operate while LOC is displayed.
Extra notes
- This page is based on Frigidaire support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-09
Based on: Based on Frigidaire support material and edited into consumer-safe guidance for the exact code family on this page.
View Frigidaire US Official Support
Model coverage note: Frigidaire oven code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.