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.
Mon–Sat, 8am–8pm
- Heating and magnetron
- Microwave magnetron repair
- Source: KitchenAid
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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 microwaveKind of codeHeating 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 toMicrowave 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 asWhat 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.
MakeKitchenAid
KitchenAid microwave problems sorted out on site, from a turntable that stands still to a panel that ignores every press.
SourceKitchenAid 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.
Switch the microwave off at the breaker for one full minute, then switch it back on.
Leave it idle for a minute and watch the display; if the code does not return, run a short test cycle.
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.
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. 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
Where F3T4 usually leads
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 repairMore KitchenAid codes
All 22 KitchenAid codesHeating and magnetron on other makes
All 4 codes of this kind
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.
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.
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.
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.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about F3T4.
Can I clear F3T4 myself?
Does F3T4 on a KitchenAid mean the magnetron is dead?
Can I replace the KitchenAid magnetron sensor myself?
Why did my KitchenAid stop halfway and show F3T4?
Back to your everyday
Still showing F3T4?
Three details make the booking useful: the characters or beeps just as they appeared, every character of the model number, and whether a cup of water still warms up. With those, the technician arrives already halfway to the answer.