--- title: "KitchenAid E23: convection preheat did not finish in 30 minutes" description: "What E23 means on KitchenAid E23: convection preheat did not finish in 30 minutess, what to check before booking, and when it is not a failure at all." url: "https://microwaverepair.center/error-codes/kitchenaid-e23/" --- # KitchenAid E23: convection preheat did not finish in 30 minutes KitchenAid convection hood combinations preheat with an element and fan inside the cavity wall. ## What E23 actually means. KitchenAid convection hood combinations preheat with an element and fan inside the cavity wall. E23 means half an hour passed without the target temperature being reached, which points to the heater, the board that drives it or the wiring between them. KitchenAid microwave display What to do when E23 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: E23 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. E23 applies only to models with convection. ## Before you book, in this order. Each step comes from KitchenAid's own guidance for E23 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 Try a plain microwave cycle with a cup of water; microwave heating uses different parts and may still work. 04 If convection preheat fails again, book a visit to test the convection element. ### 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 E23 does not mean the magnetron has failed; microwave-only cooking uses separate parts. It is also not caused by opening the door once during preheat. ## What you may notice with it. The microwave problems E23 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/) Problem ### What a Microwave Error Code Is Telling You 7 causes, cheapest first Where E23 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/) [F3T4](https://microwaverepair.center/error-codes/kitchenaid-f3t4/) [F3H1](https://microwaverepair.center/error-codes/kitchenaid-f3h1/) [F7E9](https://microwaverepair.center/error-codes/kitchenaid-f7e9/) [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 > The oven did not reach Pre-Heat Temperature within 30 (thirty) minutes. [KitchenAid Product Help, over-the-range microwave: E23](https://producthelp.kitchenaid.com/Cooking/Microwaves/Over-the-Range_Microwave/Error_Code/Starts_with_an_E/E23_-_Error_Code_-_Over-the-Range_Microwave) [KitchenAid Product Help, over-the-range microwave: E23](https://producthelp.kitchenaid.com/Cooking/Microwaves/Over-the-Range_Microwave/Error_Code/Starts_with_an_E/E23_-_Error_Code_-_Over-the-Range_Microwave) [KitchenAid Product Help, over-the-range microwave: E23](https://producthelp.kitchenaid.com/Cooking/Microwaves/Over-the-Range_Microwave/Error_Code/Starts_with_an_E/E23_-_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. E23 applies only to models with convection. ## KitchenAid E23 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 E23 affect normal microwaving on my KitchenAid? It is about the convection heater. Test a cup of water on microwave power; if it heats, microwave cooking can continue until the repair. ### Why would a KitchenAid convection element fail? Elements open up with age and heat cycling, and connectors can loosen. The technician checks resistance before replacing anything. ### Can a full cavity cause E23 on a KitchenAid? A heavily loaded cavity slows preheat, but thirty minutes is a long allowance. Repeated E23 on an empty preheat points to a part. --- **[Read on the site: KitchenAid E23: convection preheat did not finish in 30 minutes](https://microwaverepair.center/error-codes/kitchenaid-e23/)** **[Book a visit with MicrowaveRepair.center](https://microwaverepair.center/schedule/)**