--- title: "Sharp Er04: low-temperature protection on the countertop convection model" description: "What Er04 means on Sharp Er04: low-temperature protection on the countertop convection models, what to check before booking, and when it is not a failure at…" url: "https://microwaverepair.center/error-codes/sharp-er04/" --- # Sharp Er04: low-temperature protection on the countertop convection model Sharp lists Er04 on the SMC0985KS as low-temperature protection: the control has read a temperature too low for it to trust and stops to prevent further damage, sounding an alert until STOP/CLEAR is pressed. ## What Er04 actually means. Sharp lists Er04 on the SMC0985KS as low-temperature protection: the control has read a temperature too low for it to trust and stops to prevent further damage, sounding an alert until STOP/CLEAR is pressed. Sharp microwave display What to do when Er04 shows on the microwave ### Kind of code Sensors 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 to Microwave 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 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 Sharp Sharp microwaves repaired in the kitchen, including drawer models under the counter, countertop units and those mounted over the burners. ### Source Sharp USA support article table image: Automatic Protection Mechanism (SMC0985KS) Sharp documents Er04 for the SMC0985KS countertop model only. ## Before you book, in this order. Each step comes from Sharp's own guidance for Er04 on its microwaves. Follow it to the end: the last card says whether this is a visit. 01 Press STOP/CLEAR. 02 If the microwave has been stored or delivered cold, let it reach room temperature before using it again. 03 If Er04 appears in a warm kitchen, book a visit so the temperature sensing can be checked. ### Still there? It usually turns into [microwave control board and touchpad repair](https://microwaverepair.center/services/microwave-control-board-and-touchpad-repair/). Book with the code and the model number. ### What not to do Er04 is not a sign that food is undercooked; it is about the reading the control gets from its sensor. It is the opposite of Er03, which is overheating. ## What you may notice with it. The microwave problems Er04 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 Er04 usually leads ## Microwave control board and touchpad repair. **Control board, keypad membrane or display · moderate to highest.** Book a visit [What the job involves](https://microwaverepair.center/services/microwave-control-board-and-touchpad-repair/) ## Sharp microwaves. Sharp microwaves repaired in the kitchen, including drawer models under the counter, countertop units and those mounted over the burners. [Sharp microwave repair](https://microwaverepair.center/brands/sharp/) More Sharp codes [Er03](https://microwaverepair.center/error-codes/sharp-er03/) [Er05](https://microwaverepair.center/error-codes/sharp-er05/) [Er06](https://microwaverepair.center/error-codes/sharp-er06/) [ERROR](https://microwaverepair.center/error-codes/sharp-error/) [LOCK ON](https://microwaverepair.center/error-codes/sharp-lock-on/) [DEMO ON](https://microwaverepair.center/error-codes/sharp-demo-on/) [DOOR LOCK ON](https://microwaverepair.center/error-codes/sharp-door-lock-on/) [ENJOY YOUR MICROWAVE](https://microwaverepair.center/error-codes/sharp-enjoy-your-microwave/) Sensors and temperature on other makes [Bertazzoni ERROR](https://microwaverepair.center/error-codes/bertazzoni-error/) [Bosch ERROR](https://microwaverepair.center/error-codes/bosch-error/) [Café HOT](https://microwaverepair.center/error-codes/cafe-hot/) [Dacor C-10](https://microwaverepair.center/error-codes/dacor-c-10/) [Fisher & Paykel A1](https://microwaverepair.center/error-codes/fisher-and-paykel-a1/) [Fulgor Milano ERROR](https://microwaverepair.center/error-codes/fulgor-milano-error/) [GE Profile ERR](https://microwaverepair.center/error-codes/ge-profile-err/) [JennAir E11](https://microwaverepair.center/error-codes/jennair-e11/) [All 42 codes of this kind](https://microwaverepair.center/error-codes/#family-sensor) Sharp 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. Sharp 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. Sharp builds this ### Microwave drawer A microwave built under a counter or into a kitchen island that opens like a drawer at the touch of a key, with a motor and gears sliding its cavity out toward you. ## In Sharp's own words > The display may show Er04, which means the appliance has entered into low temperature protection mode. [Sharp USA support article table image: Automatic Protection Mechanism (SMC0985KS)](https://support.sharpusa.com/servlet/rtaImage?eid=ka0UV000000OvwP&feoid=00NHp00000kcRRY&refid=0EMUV00000AU5vl) [Sharp USA support article table image: Automatic Protection Mechanism (SMC0985KS)](https://support.sharpusa.com/servlet/rtaImage?eid=ka0UV000000OvwP&feoid=00NHp00000kcRRY&refid=0EMUV00000AU5vl) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sharp documents Er04 for the SMC0985KS countertop model only. ## Sharp Er04 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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Press STOP/CLEAR. If it comes back, it needs a visit. ### Why would my Sharp microwave show Er04 in a heated kitchen? A low reading in a warm room suggests the sensor or its circuit is not reporting properly and should be tested. ### Does a cold garage cause Er04 on a Sharp microwave? It can. Let the microwave warm to room temperature before starting it. ### Is Er04 dangerous on my Sharp microwave? No. The control has stopped to protect itself. --- **[Read on the site: Sharp Er04: low-temperature protection on the countertop convection model](https://microwaverepair.center/error-codes/sharp-er04/)** **[Book a visit with MicrowaveRepair.center](https://microwaverepair.center/schedule/)**