--- title: "KitchenAid F3T4: the magnetron temperature sensor" description: "What F3T4 means on KitchenAid F3T4: the magnetron temperature sensors, what to check before booking, and when it is not a failure at all." url: "https://microwaverepair.center/error-codes/kitchenaid-f3t4/" --- # KitchenAid F3T4: the magnetron temperature sensor A KitchenAid hood combination keeps a temperature sensor on the magnetron so it can stop the tube before it overheats. ## What F3T4 actually means. A KitchenAid hood combination keeps a temperature sensor on the magnetron so it can stop the tube before it overheats. F3T4 says that sensor or its circuit has gone out of range, and the control shuts heating down rather than run the magnetron blind. KitchenAid microwave display · also shown as F3 T4 What to do when F3T4 shows on the microwave ### Kind of code Heating and magnetron The microwave ran a cycle and the control saw no heat come of it, or saw the power section behave strangely. The cause sits somewhere in the chain that makes the energy: the magnetron, the high-voltage diode and capacitor, the transformer that feeds them. All of it lives behind the outer cabinet, where a capacitor keeps a dangerous charge even unplugged, so after a restart the owner's part ends at booking the visit. ### Usually leads to Microwave magnetron repair Replacing the tube that makes a microwave's heat, after proving the parts that feed it are sound, and renewing the waveguide cover and any pitted metal where sparks have been. ### Shows up as What a Microwave Error Code Is Telling You A microwave error code may be a letter and a number on the display, a lock or demo word, a row of dashes, or a beep with a blinking clock, and it can show while the microwave still heats or block every key until it is cleared. ### Make KitchenAid KitchenAid microwave problems sorted out on site, from a turntable that stands still to a panel that ignores every press. ### Source KitchenAid Product Help, over-the-range microwave: F3T4 Listed on KitchenAid's help pages for over-the-range microwaves; the lettered F-codes belong to the newer hood controls, and the exact code set depends on the model generation. ## Before you book, in this order. Each step comes from KitchenAid's own guidance for F3T4 on its microwaves. Follow it to the end: the last card says whether this is a visit. 01 Switch the microwave off at the breaker for one full minute, then switch it back on. 02 Leave it idle for a minute and watch the display; if the code does not return, run a short test cycle. 03 Make sure nothing is stacked on top of the unit or blocking the grille, since the magnetron is cooled by air drawn through the unit. 04 If F3T4 returns, stop using the microwave and book a visit; the sensor sits next to high-voltage parts that stay charged after unplugging. ### Still there? It usually turns into [microwave magnetron repair](https://microwaverepair.center/services/microwave-magnetron-repair/). Book with the code and the model number. ### What not to do F3T4 is not the same as a magnetron that has failed; the sensor or its wires are the first suspects. It is also not a door code, so opening and closing the door will not clear it. ## What you may notice with it. The microwave problems F3T4 tends to arrive with. Answer these at the microwave before anyone is booked. [All problems](https://microwaverepair.center/problems/) Before you call ### [What a Microwave Error Code Is Telling You](https://microwaverepair.center/problems/microwave-error-code/) [All 7 causes, cheapest first](https://microwaverepair.center/problems/microwave-error-code/) It also comes with - [**Microwave Runs but Food Stays Cold**](https://microwaverepair.center/problems/microwave-not-heating/) - [**Microwave Shuts Off Before the Timer Ends**](https://microwaverepair.center/problems/microwave-stops-mid-cycle/) Problem ### What a Microwave Error Code Is Telling You 7 causes, cheapest first Where F3T4 usually leads ## Microwave magnetron repair. **Magnetron and waveguide cover · moderate to highest.** Book a visit [What the job involves](https://microwaverepair.center/services/microwave-magnetron-repair/) ## KitchenAid microwaves. KitchenAid microwave problems sorted out on site, from a turntable that stands still to a panel that ignores every press. [KitchenAid microwave repair](https://microwaverepair.center/brands/kitchenaid/) More KitchenAid codes [LOC](https://microwaverepair.center/error-codes/kitchenaid-loc/) [DOOR](https://microwaverepair.center/error-codes/kitchenaid-door/) [PF](https://microwaverepair.center/error-codes/kitchenaid-pf/) [Demo](https://microwaverepair.center/error-codes/kitchenaid-demo/) [Change the Charcoal Filter](https://microwaverepair.center/error-codes/kitchenaid-change-charcoal-filter/) [F2](https://microwaverepair.center/error-codes/kitchenaid-f2/) [SE](https://microwaverepair.center/error-codes/kitchenaid-se/) [F2H1](https://microwaverepair.center/error-codes/kitchenaid-f2h1/) [F3H1](https://microwaverepair.center/error-codes/kitchenaid-f3h1/) [F7E9](https://microwaverepair.center/error-codes/kitchenaid-f7e9/) [E23](https://microwaverepair.center/error-codes/kitchenaid-e23/) [E24](https://microwaverepair.center/error-codes/kitchenaid-e24/) [All 22 KitchenAid codes](https://microwaverepair.center/error-codes/#codes-kitchenaid) Heating and magnetron on other makes [Fisher & Paykel A5](https://microwaverepair.center/error-codes/fisher-and-paykel-a5/) [JennAir F3T4](https://microwaverepair.center/error-codes/jennair-f3t4/) [All 4 codes of this kind](https://microwaverepair.center/error-codes/#family-heating) KitchenAid builds this ### Microwave hood combination The microwave that hangs from the wall cabinets above the burners, heating food in its cavity while its own fan, light and filters handle the steam and grease rising from the pans beneath it. KitchenAid builds this ### Built-in microwave A microwave set into a tall cabinet or a wall of cabinetry at eye level, either a countertop body wrapped in a trim kit or a true built-in model, including speed and convection microwaves that brown as well as heat. KitchenAid builds this ### Countertop microwave A microwave that stands on the counter or a shelf and plugs into an outlet beside it, from a compact model for a dorm to a large inverter or convection unit in a busy family kitchen. ## In KitchenAid's own words > There may be a problem with the Magnetron Temperature Thermistor or the associated wiring. [KitchenAid Product Help, over-the-range microwave: F3T4](https://producthelp.kitchenaid.com/Cooking/Microwaves/Over-the-Range_Microwave/Error_Code/Starts_with_F/Starts_with_F3/F3T4_-_Error_Code_-_Over-the-Range_Microwave) [KitchenAid Product Help, over-the-range microwave: F3T4](https://producthelp.kitchenaid.com/Cooking/Microwaves/Over-the-Range_Microwave/Error_Code/Starts_with_F/Starts_with_F3/F3T4_-_Error_Code_-_Over-the-Range_Microwave) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed on KitchenAid's help pages for over-the-range microwaves; the lettered F-codes belong to the newer hood controls, and the exact code set depends on the model generation. ## KitchenAid F3T4 microwave repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Switch the microwave off at the breaker for one full minute, then switch it back on. If it comes back, it needs a visit. ### Does F3T4 on a KitchenAid mean the magnetron is dead? Not necessarily. The code is about the thermistor that watches the magnetron, and a sensor or wiring repair is far more common than a new tube. ### Can I replace the KitchenAid magnetron sensor myself? No. It sits inside the cabinet beside the high-voltage capacitor, which holds a dangerous charge even unplugged. That work is for a technician. ### Why did my KitchenAid stop halfway and show F3T4? The control saw an out-of-range reading during heating and shut the magnetron down to protect it. Reset it once; if it repeats, book a visit. --- **[Read on the site: KitchenAid F3T4: the magnetron temperature sensor](https://microwaverepair.center/error-codes/kitchenaid-f3t4/)** **[Book a visit with MicrowaveRepair.center](https://microwaverepair.center/schedule/)**