What the code means
The documented reading of F3 E5 is a fault in the lower oven temperature sensor, the control or their wiring. A power cycle is worth one try; if the code returns, leave the lower oven off until the sensor circuit has been measured.
Error codes
Reference| Code | Meaning |
|---|---|
| F3 E5 | There may be a problem with the Lower Oven Temperature Sensor, the Control, or the associated wiring. |
What you observe
- Food burned or undercooked before the code — Results went wrong for a while, and the code showed up later.
- Preheat overshoots or never finishes — A sensor reading wrong makes the control heat too long or stop too soon.
- NEAR MISS: the cavity never warms at all — No heat and no sensor code points at the heating element or its supply, a different fault.
Causes, most likely first
- The lower oven temperature sensor itself — Ranked first when F3 E5 comes after temperatures that wandered: a sensor drifting out of range reads wrong before it fails outright, and the control regulates to the wrong reading.
- A probe knocked toward the cavity wall — Inside the oven the probe should stand clear of the wall; one bent against it by a rack reads the wall rather than the air.
- The control reading the sensor — Named in the documented meaning, but concluded last: it is replaced only after the sensor and its wiring measure good.
Diagnostic order, cheapest and safest first
- Compare with an oven thermometer — If the oven still heats, a separate thermometer shows whether it is regulating far off its setting.
- Look at the probe in the cavity — With the oven cool, find the probe near the top rear of the cavity and check it stands clear of the wall and is not bent or loose.
- Reset and note the timing — Power-cycle at the breaker, preheat once, and note whether the code returns at once or only when hot.
What an owner can safely do
- Run a thermometer check — If the oven will still heat, place an oven thermometer in the center and compare it with the setting once the oven has settled.
Tools: oven-safe thermometerAbout 30 min
- Inspect the sensor probe — With the oven cool and off at the breaker, look at the probe at the top rear of the cavity; if it has been knocked toward the wall, note it for the technician rather than bending it.
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 before any check
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 oven that keeps heating with a sensor code can overheat; if that happens, switch it off at the breaker rather than at the panel.
When to call a technician
Call for service if F3 E5 returns after a reset, or at once if the lower oven keeps heating with the code showing or runs far hotter than its setting. Measuring the sensor and its harness against the model's specification is the test that decides the repair, and it needs a meter and the oven's rear connections.
Nearby codes on the same oven line
Scope of this code reading
What this covers: F3 E5 as Jenn-Air documents it for the lower oven of Jenn-Air double ovens whose code list carries F3 E5 as a temperature-sensor fault. What it does not cover: meat-probe codes, microwave and cooktop sensor codes, and models that read F3 E5 differently, or the wiring colors, part numbers and test values of any one model. A model-specific page for your unit, where one exists, outranks this general reading.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
