Short answer first
The documented reading of F1-2 is a fault in the oven temperature sensor, the control or their wiring. A power cycle is worth one try; if the code returns, leave the oven off until the sensor circuit has been measured.
Error codes
Reference| Code | Meaning |
|---|---|
| F1-2 | There may be a problem with the Oven Temperature Sensor, the Control, or the associated wiring. |
What you observe
- The code appears at the start of preheat — The oven begins to heat and the code shows within moments, before the cavity is warm.
- An element runs without cycling off — A control that reads the cavity as cold keeps heating; if you see this, switch off at the breaker.
- 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
- A failed or drifting oven temperature sensor — Ranked first when F1-2 appears as soon as the oven starts heating: a sensor that has failed open or shorted gives an impossible reading straight away, and it is the part the reading comes from.
- The sensor connector behind the oven — The sensor plugs into the harness at the back wall; a connector pulled half off, corroded or heat-darkened breaks the reading.
- Sensor wiring damaged by heat or pinching — The leads run behind the cavity insulation; heat hardens them, and a range pushed hard against the wall can pinch them.
What to check first, and why
- 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.
- Check what came before — A code that started after a self-clean or after the range was moved points at heat or pinch damage to the sensor wiring.
Clearing the code and safe checks
- Reset the control — Switch the oven off at the breaker for a few minutes, then back on.
About 5 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 before any panel comes off — Everything past this point needs live measurements or a panel removed; that is the line between an owner check and a service call.
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. The sensor probe sits inside a cavity that stays hot long after cooking, and its connector is behind the oven next to live terminals; inspect only the visible probe, with the oven cool and off at the breaker.
Reset or service call?
Call for service if F1-2 returns after a reset, or at once if the 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
Generalized information
This is the generalized reading of F1-2 across the Jenn-Air oven line. It applies to Jenn-Air ovens whose code list carries F1-2 as a temperature-sensor fault. It does not apply to meat-probe codes, microwave and cooktop sensor codes, and models that read F1-2 differently, and the same characters can mean something else on another brand. Where a model-specific page exists for your model line, it is the more specific answer and 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.
