JennAir JMV Code F3T3: hood temperature thermistor

What F3T3 means

F3T3 is shown by JennAir over-the-range microwave hoods, among them the JMV9196CS and JMV8000 series, when the hood temperature thermistor or its wiring may have a problem. This sensor watches the temperature of the hood section that sits above your cooktop. With F3T3 on screen, the unit may refuse to run or stop partway to protect itself. The code may show up after long cooking on the range below the hood.

Common causes of F3T3

Hood temperature thermistor has failed
Connector or wire to the thermistor is loose
Heat or grease damage to the sensor lead

✓ One safe check you can try

1. Press Stop/Cancel and let the hood section cool. 2. Check that the underside vent and filters are free of heavy grease and nothing sits on top of the unit. 3. Briefly cut power at the breaker, then switch it back on. 4. Test with a cup of water for thirty seconds. 5. If F3T3 returns, stop and call us.

! Why to stop there

The thermistor is mounted inside the hood housing near the fan and wiring.
A false hot reading can cut off cooking, while a false cool one can hide a real overheat.
Reaching it needs the unit opened.
Our price is given in writing before work, with a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Microwave codes

FC E8JennAir OTR Microwave Code FC E8: registration rejected, check the SAID number FCE8JennAir OTR Microwave Code FCE8: wrong appliance type or model chosen Flashing 0:00JennAir Countertop Microwave Message Flashing 0:00: Reset the Clock Flashing ":" or PF in displayJennAir OTR Microwave Message Flashing ":" or PF: Power Failure or Clock Off LOC or "L" or Padlock IconJennAir Microwave Message LOC, L or Padlock Icon: Control Lock Enabled Locked, Lock or LocJennAir Built-In Microwave Message "Locked, Lock or Loc": Control Lock On ":" or "." in displayJennAir Built-In Message ":" or "." in display: clock needs setting F8 E3JennAir Built-In Microwave Code F8 E3: one more cooling alert

F3T3F3T3 questions

Why does a hood over a cooktop have its own temperature sensor?

Heat and steam from pans rise into the hood section. This sensor lets the control watch that heat and protect the electronics. If the reading goes missing, the control shows F3T3.

Can I cook on the range below while F3T3 shows?

Cooking below does not damage anything instantly, but the hood cannot guard itself. Keep the heat moderate and avoid long, high-heat sessions until the sensor is checked.

Does cleaning the grease filter fix F3T3?

A clean filter helps airflow and keeps the hood cooler. It cannot repair a failed sensor. If the code is still there after cleaning, the thermistor circuit needs testing.