The short answer
E23 means the oven did not reach its preheat temperature within the 30 minutes the documentation allows, and Jenn-Air names the heater, the appliance control board or the wiring. Until the cause is found the oven will under-heat, so it can be used only attended and only for dishes that tolerate uneven heat.
Error codes
Reference| Code | Meaning |
|---|---|
| E23 | The oven did not reach Pre-Heat Temperature within 30 (thirty) minutes. There may a problem with the Heater, the Appliance Control Board, or the associated wiring. |
What the oven does alongside the code
- Food takes far longer than the recipe says — Under-heating shows up as pale, undercooked results before anyone notices the code.
- One element stays dark — Where an element is visible, a bake or broil element that never glows is a strong clue.
- NEAR MISS: the oven reaches temperature but food still cooks badly — That is calibration, rack position or cookware, not a preheat failure.
Causes, most likely first
- A failed heating element — Ranked first because E23 is a timeout: the oven kept trying for the full 30 minutes and never got there, which is what an element that has opened produces.
- Half the supply missing — A double breaker tripped on one side can leave the display alive while heating runs weak or not at all.
- Wiring or a terminal between board and element — A burnt terminal at the element or an open wire carries no current, so the element stays cold even though it is sound.
What to check first, and why
- Watch which heat source works — Where elements are visible, note whether bake and broil each glow; a cold one is the lead.
- Confirm the breaker is fully on — Switch it fully off and on; one tripped side of a double breaker gives weak heating with a live display.
- Check the door closes fully — Look for a gap, a displaced gasket or a rack catching the door.
Clearing the code and safe checks
- Run one attended preheat — Set a moderate bake temperature and watch for the ready signal; where the elements are visible, note which ones glow.
Tools: oven-safe thermometerAbout 30 min
- Reset the breaker fully — Switch the oven breaker hard off and back on.
About 2 min
- Inspect the door and gasket — Look for a gap at the door edge, a torn or loose gasket, or a rack stopping the door from closing.
Tools: flashlightAbout 5 min
- Stop here if the next check needs a meter — Testing a part or its wiring means live terminals or disassembly, which is technician work.
Safety first
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. An element that has split or blistered can arc; never touch an element or its terminals with the oven powered.
When to call a technician
Once the breaker and the door are ruled out and E23 comes back, book a technician to test the heating circuit; repeated preheat attempts only add wear to the parts that still work.
Nearby codes on the same oven line
Generalized information
Generalized information: E23 is read here for the Jenn-Air oven line as a whole, which fits Jenn-Air ovens whose code list carries E23 as a preheat failure. It is not a reading for overheat codes, cooktop codes, and models that give E23 a different reading. Model lines can reuse a code with another meaning, so a model-specific page, where one exists, comes first.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
