Error code
Frigidaire-built Kenmore range error code F40
Frigidaire wrote this code, not Kenmore. On a range wearing this badge, F40 means: Frigidaire's own label: cooktop lock out. Which model prefixes can raise it, and what to do next.
- From $95 diagnostic, credited to the repair
- 59 cities and neighborhoods covered
- OEM parts available on order
- In writing the price, before anything is opened
What we can confirm
Code F40, from the manufacturer's own documentation
A code is only meaningful together with the machine showing it — the same digits mean different things on different equipment.
What it narrows down to
Frigidaire's own label: cooktop lock out
What you are probably seeing
Diagnostic
From $95, credited to the repair
What it looks like from the kitchen
The symptom this code usually arrives with
A code names the subsystem; the symptom is what sent you to look at the display in the first place. That page says what it usually turns out to be, cheapest cause first.
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It locked itself and will not open Oven door locked shut
Nearly always a self-clean cycle that has not completed or has not cooled, and nearly always resolvable without damage — provided nobody forces it. Forcing an oven door lock is how a modest repair becomes a hinge and a liner.
- Almost always a self-clean cycle
- Do not force it — that is the expensive mistake
- The lock holds until the cavity is genuinely cool
On the same appliance
What else belongs to the ranges
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
Frigidaire's own wording: F10 indicates the oven is detecting higher-than-normal temperatures
Frigidaire's own label: open probe
Frigidaire's own label: shorted probe
Frigidaire's own label: shorted key pad
Frigidaire's own label: a door lock issue
Frigidaire's own label: communication error — the parts of
Frigidaire names these micro identification and E prompt failure
A dash in the display means the cooktop is locked
The oven is running in demonstration mode: the panel
The same digits mean different things on different equipment. Search the full code list
In more detail
About Frigidaire-built Kenmore range error code F40
Whose code this actually is
Kenmore did not write F40, because Kenmore has never built an appliance. This one is Frigidaire's, and it appears on the range that Frigidaire built and Sears sold under the Kenmore badge. Ranges under this badge came from Frigidaire, GE and Roper, and one of those three publishes no code documentation at all — so even knowing a range is not enough. The prefix is.
What it means
Frigidaire's own label: cooktop lock out.
Which Kenmore models can raise it
The Kenmore range whose model number begins 790 — the three digits before the period on the rating plate. Those digits are Frigidaire's, which is why Frigidaire's table is the one that applies to F40 and no other manufacturer's does.
The other ways it may be written
The same condition is published under more than one label, because it has been carried across generations of the appliance and because a segment display draws some characters oddly: F41. They are the same finding and they lead to the same place.
Worth trying yourself, in this order
- Check the lock function on the panel.
- It is a setting more often than a defect.
Where this usually goes
The job this most often becomes is oven door lock repair, and that page carries a starting figure and the reasons that move it. A Kenmore range in a South Florida kitchen is usually freestanding rather than built in, which keeps the access short and means most of these end in one visit. Photograph the display before you cut the power: a reset clears F40, and on a Kenmore the characters plus three digits off the plate are most of the diagnosis.
Where this meaning came from
Frigidaire's own documentation: Ranges — Error Code Guide, Frigidaire owner support. Kenmore publishes none of its own, which is why every entry on this site names the manufacturer's document instead.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards