KitchenAid F4E4: the humidity thermistor on sensor-cook models
On some KitchenAid control generations, humidity is read by a thermistor rather than the sensor named in F3H1.
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- Sensors and temperature
- Microwave control board and touchpad repair
- Source: KitchenAid
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What F4E4
actually means.
On some KitchenAid control generations, humidity is read by a thermistor rather than the sensor named in F3H1. F4E4 means that thermistor or its wiring has drifted out of range, so reheat and cook programs that end on a humidity rise cannot be trusted.
KitchenAid microwave display · also shown as F4 E4
What to do when F4E4 shows on the microwaveKind of codeSensors and temperature
The control has stopped trusting what one of its sensors reports: the cook or humidity sensor that ends a sensor reheat when steam rises, or a thermal cutout that trips when the cavity or the magnetron runs too hot. A cutout that opens stops the microwave mid-cycle and often recovers once it cools; one that keeps tripping, or a sensor program that shuts off at once every time, needs the sensor, its wiring or the airflow behind it checked.
Usually leads toMicrowave control board and touchpad repair
Tracing a dead display, keys that do not answer or a code that keeps returning to the keypad, the ribbon, the relays or the main board, and replacing only the part that failed.
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: F4E4
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 F4E4 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.
Switch to manual time and power for everyday reheating.
Book a visit if F4E4 keeps appearing.
Still there?
It usually turns into microwave control board and touchpad repair. Book with the code and the model number.
What not to do
F4E4 does not disable manual cooking. Steam fogging the door glass is normal and does not set this code.
What you may
notice with it.
The microwave problems F4E4 tends to arrive with. Answer these at the microwave before anyone is booked.
All problems
Where F4E4 usually leads
Microwave control board and touchpad 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 codesSensors and temperature on other makes
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 Humidity 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 F4E4 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 F4E4.
Can I clear F4E4 myself?
What stops working on a KitchenAid with F4E4?
My KitchenAid showed F4E4 once and never again. Should I worry?
Is F4E4 on a KitchenAid expensive to fix?
Back to your everyday
Still showing F4E4?
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.