--- title: "KitchenAid over-the-range microwave error code F3T4" description: "KitchenAid over-the-range microwave error code F3T4: There may be a problem with the Magnetron Temperature Thermistor or the associated wiring." url: "https://kitchenaidmiami.support/error-codes/error-code-f3t4-microwave/" date_modified: "2026-08-23" Appliance type: "Microwaves" --- # KitchenAid over-the-range microwave error code F3T4 ### What KitchenAid publishes for F3T4 on a over-the-range microwave There may be a problem with the Magnetron Temperature Thermistor or the associated wiring. That sentence is KitchenAid’s own, read off its published support page for this condition on a over-the-range microwave rather than worked out from the outside. Everything under it is ours, written from what this equipment does in Miami kitchens. The useful part of that is the noun: **Magnetron Temperature Thermistor**. A published cause on this platform names a circuit rather than a component, which is the single most useful thing to know before anybody orders a part — it tells you which side of the appliance a technician starts on, and it does not tell you which piece of that circuit has moved out of range. ### The power cycle is a test, not a repair The whole of what KitchenAid publishes to do about F3T4 on a over-the-range microwave is a one-minute cycle at the breaker — on the same page that says the condition points at the magnetron temperature thermistor. Do it, and read the result rather than the instruction. Cutting power clears the stored code and makes the control re-read every circuit from cold. If the condition was a one-off — a control interrupted mid-write, a reading that went out of range once — the code does not come back and there is nothing to repair. **If it comes back, the reset has told you something.** The condition is live, the circuit is still reporting, and a second power cycle will not change that. From there it is a diagnosis rather than a procedure. #### KitchenAid’s own steps, in its order - Power unit down by turning off the circuit breaker(s) for one (1) minute. - Power unit up by turning on the circuit breaker(s). - Monitor the oven for one (1) minute to ensure the error code does not display again. - Verify oven operation. ### Then what One more thing worth saying plainly: **this code is not this badge’s alone.** KitchenAid shares its control platform with the other names in the same group, and the same page for F3T4 sits at the same address under more than one of them. That is useful rather than awkward — it means the code names the subsystem and the model number names the machine, so the plate on the door frame is half of every answer here. The [full KitchenAid code archive](https://kitchenaidmiami.support/error-codes/) holds the rest, searchable. Tell us the model number and exactly what the display is showing and we will tell you what it points at before anybody is booked. We repair this equipment across Miami-Dade, Broward and Palm Beach. Over-the-range microwave What this one means What KitchenAid publishes for F3T4 on a over-the-range microwave There may be a problem with the Magnetron Temperature Thermistor or the associated wiring. That sentence is KitchenAid’s own, read off its published support page for this condition on a over-the-range microwave rather than worked out from the outside. Everything under it is ours, written from what this equipment does in Miami kitchens. The useful part of that is the noun: Magnetron Temperature Thermistor. A published cause on this platform names a circuit rather than a component, which is the single most useful thing to know before anybody orders a part — it tells you which side of the appliance a technician starts on, and it does not tell you which piece of that circuit has moved out of range. The power cycle is a test, not a repair The whole of what KitchenAid publishes to do about F3T4 on a over-the-range microwave is a one-minute cycle at the breaker — on the same page that says the condition points at the magnetron temperature thermistor. Do it, and read the result rather than the instruction. Cutting power clears the stored code and makes the control re-read every circuit from cold. If the condition was a one-off — a control interrupted mid-write, a reading that went out of range once — the code does not come back and there is nothing to repair. If it comes back, the reset has told you something. The condition is live, the circuit is still reporting, and a second power cycle will not change that. From there it is a diagnosis rather than a procedure. KitchenAid’s own steps, in its order Power unit down by turning off the circuit breaker(s) for one (1) minute. Power unit up by turning on the circuit breaker(s). Monitor the oven for one (1) minute to ensure the error code does not display again. Verify oven operation. Then what One more thing worth saying plainly: this code is not this badge’s alone. KitchenAid shares its control platform with the other names in the same group, and the same page for F3T4 sits at the same address under more than one of them. That is useful rather than awkward — it means the code names the subsystem and the model number names the machine, so the plate on the door frame is half of every answer here. The full KitchenAid code archive holds the rest, searchable. Tell us the model number and exactly what the display is showing and we will tell you what it points at before anybody is booked. We repair this equipment across Miami-Dade, Broward and Palm Beach. --- **[Read full article: KitchenAid over-the-range microwave error code F3T4](https://kitchenaidmiami.support/error-codes/error-code-f3t4-microwave/)**