KitchenAid E21: an open thermal sensor circuit on a convection model
Convection hood combinations from KitchenAid hold their baking temperature with a thermal sensor.
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- Sensors and temperature
- Microwave control board and touchpad repair
- Source: KitchenAid
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What E21
actually means.
Convection hood combinations from KitchenAid hold their baking temperature with a thermal sensor. An open reading, as if the wire were cut, gives the control nothing to work with, and E21 is how it refuses to run convection blind.
KitchenAid microwave display
What to do when E21 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: E21
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. E21 applies only to models with convection.
Before you book,
in this order.
Each step comes from KitchenAid's own guidance for E21 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.
If the unit was baking, let the cavity cool down fully before the next try.
If E21 repeats, book a visit so the sensor, board and harness can be measured.
Still there?
It usually turns into microwave control board and touchpad repair. Book with the code and the model number.
What not to do
E21 is an open circuit and E22 is the same sensor reading shorted; neither code condemns the heating element. Microwave-only cooking uses different parts and may keep working.
What you may
notice with it.
The microwave problems E21 tends to arrive with. Answer these at the microwave before anyone is booked.
All problems
Where E21 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
The Thermal Sensor circuit reported open to the control board.
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. E21 applies only to models with convection.
KitchenAid E21 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 E21.
Can I clear E21 myself?
Can I still reheat coffee on my KitchenAid with E21?
What usually breaks to cause E21 on a KitchenAid?
How is E21 different from E24 on a KitchenAid?
Back to your everyday
Still showing E21?
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.