The short answer
Jenn-Air documents F3T2 as a possible problem with the convection thermistor or its wiring. That thermistor reads the temperature of the convection system, so convection functions may stop or misbehave until it is fixed, while plain bake may still run on some models. Avoid convection cooking until the code clears and stays clear.
Error codes
Reference| Code | Meaning |
|---|---|
| F3T2 | There may be a problem with the Convection Thermistor or the associated wiring. |
Signs that come with the code
- Convection modes cancel with the code — Selecting convection bake or roast brings up the code.
- Convection results are uneven — Before the code appears, convection cooking may brown unevenly.
- The convection fan is silent or noisy — A fan that does not turn, or grinds, is worth reporting alongside the code.
- NEAR MISS: an oven temperature sensor code — That is the main cavity sensor, a different part with its own checks.
Likely causes, ranked
- The convection thermistor — Ranked first because F3T2 names the convection thermistor itself, and it sits in the moving hot air of the convection system, which is hard on a small sensing part.
- Its connector at the rear of the cavity — The convection components sit at the back, where heat can loosen or darken a connector.
- A convection fan that is not moving air — If the fan has stopped, the air around the thermistor can run hotter than the control expects, and the thermistor may be reporting accurately.
Check in this order
- Compare bake and convection — Run a short plain bake, then a short convection bake, and note which raises the code.
- Listen to the convection fan — During convection preheat, the fan behind the rear cover should be audible; silence or grinding is worth noting.
- Reset once — A power cycle clears a latched report; a code that returns at once is a circuit fault.
- Thermistor and harness tests — Removing the rear cover and measuring the thermistor is technician work.
Reset and owner-safe checks
- Reset at the breaker — Breaker off for a few minutes, then on.
About 5 min
- Test plain bake — Run a short plain bake and confirm whether it works without the code; use it meanwhile if it does.
Tools: oven-safe thermometerAbout 15 min
- Listen to the convection fan — Start a convection preheat and listen for the fan; stop if it grinds or rattles.
About 3 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.
Before you open anything
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 convection fan and element sit behind the rear cover; never remove that cover or reach behind it while the oven is powered or hot. Let the cavity and any surface units cool fully before reaching in or behind them.
When it is a service call
Call for service if F3T2 returns after a reset, if the convection fan grinds or stays silent, or if plain bake also stops working. Testing the thermistor and fan means removing the rear cover and measuring, which is technician work.
Neighboring Jenn-Air oven codes
Generalized information
This is the generalized reading of F3T2 across the Jenn-Air oven line. It applies to Jenn-Air convection ovens whose code list carries F3T2 as a convection thermistor fault. It does not apply to ovens without convection, cavity sensor codes, and models that read F3T2 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.
