--- title: "Samsung wall oven showing C-20 | OvenRepair.center" description: "What C-20 means on Samsung wall ovens, what to check before booking, and when it is not a failure at all." url: "https://ovenrepair.center/error-codes/samsung-c-20/" --- # Samsung wall oven showing C-20 Samsung uses C-20 for an oven sensor that reads as open or as shorted while the oven is running. ## What C-20 actually means. Samsung uses C-20 for an oven sensor that reads as open or as shorted while the oven is running. Without that reading the control cannot hold the set temperature. Samsung oven display What to do when C-20 shows on the oven ### Kind of code Temperature sensor The reading from the temperature probe fell outside what the control will trust, or climbed far higher than the setting. A loose connector or a probe that has drifted is ruled out before the control itself, and a reading that runs away means the breaker goes off first. ### Usually leads to Temperature sensor and calibration Baking that comes out burnt or pale at the usual setting, traced to the sensor, its wiring or an oven that simply needs calibrating. ### Shows up as Oven Temperature Not Accurate Recipes come out burnt or underdone at the right setting, and an oven thermometer reads far from the dial. ### Make Samsung A Korean electronics group whose wall ovens include models with dual cooking zones and steam features. ### Source Samsung NV51K7770D double wall oven user manual DG68-00856A-03, Information codes (Samsung download center) Same meaning in the NV51K7770D and NV51CG700D manuals. ## Before you book, in this order. Each step comes from Samsung's own guidance for C-20 on its ovens. Follow it to the end: the last card says whether this is a visit. 01 Switch the oven off with OFF and restart it. 02 If the code persists, disconnect all power for at least 30 seconds and reconnect it. 03 Book a visit if C-20 returns; the sensor is measured before it is replaced. ### Still there? It usually turns into [temperature sensor and calibration](https://ovenrepair.center/services/temperature-sensor-and-calibration/). Book with the code and the model number. ### What not to do C-20 is not an overheat. Samsung keeps that for C-21. ## What you may notice with it. The oven problems C-20 tends to arrive with. Answer these at the oven before anyone is booked. [All problems](https://ovenrepair.center/problems/) Before you call ### [Oven Temperature Not Accurate](https://ovenrepair.center/problems/oven-temperature-wrong/) [All 5 causes, cheapest first](https://ovenrepair.center/problems/oven-temperature-wrong/) It also comes with - [**Oven Not Heating**](https://ovenrepair.center/problems/oven-not-heating/) - [**Oven Error Code**](https://ovenrepair.center/problems/oven-error-code/) Problem ### Oven Temperature Not Accurate 5 causes, cheapest first Where C-20 usually leads ## Temperature sensor and calibration. **Temperature sensor or calibration · low.** Book a visit [What the job involves](https://ovenrepair.center/services/temperature-sensor-and-calibration/) ## Samsung ovens. A Korean electronics group whose wall ovens include models with dual cooking zones and steam features. [Samsung oven repair](https://ovenrepair.center/brands/samsung/) More Samsung codes [C-d0](https://ovenrepair.center/error-codes/samsung-c-d0/) [C-d1](https://ovenrepair.center/error-codes/samsung-c-d1/) [C-F0](https://ovenrepair.center/error-codes/samsung-c-f0/) [C-21](https://ovenrepair.center/error-codes/samsung-c-21/) [-dC-](https://ovenrepair.center/error-codes/samsung-dc/) [C-70](https://ovenrepair.center/error-codes/samsung-c-70/) [C-72](https://ovenrepair.center/error-codes/samsung-c-72/) [C-A2](https://ovenrepair.center/error-codes/samsung-c-a2/) [tESt](https://ovenrepair.center/error-codes/samsung-test/) Temperature sensor on other makes [Dacor C-20](https://ovenrepair.center/error-codes/dacor-c-20/) [Electrolux F30](https://ovenrepair.center/error-codes/electrolux-f30/) [Fisher & Paykel F210](https://ovenrepair.center/error-codes/fisher-and-paykel-f210/) [Frigidaire F30](https://ovenrepair.center/error-codes/frigidaire-f30/) [GE Profile F4](https://ovenrepair.center/error-codes/ge-profile-f4/) [GE F3](https://ovenrepair.center/error-codes/ge-f3/) [JennAir F3 E0](https://ovenrepair.center/error-codes/jennair-f3e0/) [Kenmore F3/E0](https://ovenrepair.center/error-codes/kenmore-f3-e0/) [All 30 codes of this kind](https://ovenrepair.center/error-codes/#family-sensor-circuit) Samsung builds this ### Single wall oven One oven cavity set into a cabinet at chest height, with its own controls above the door and nothing to cook on above it. Samsung builds this ### Double wall oven Two full oven cavities stacked in one tall cabinet, sharing one control panel and one power supply but heating on their own. ## In Samsung's own words > The oven sensor is open when the oven is operating. [Samsung NV51K7770D double wall oven user manual DG68-00856A-03, Information codes (Samsung download center)](https://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=UNI_CA&OriginYN=N&ModelType=N&ModelName=NV51K7770DS%2FAA&CttFileID=7281356&CDCttType=UM&VPath=UM%2F201904%2F20190417153009320%2FNV51K7770D_AA_DG68-00856A-03_EN-MES-CFR.pdf) [Samsung NV51K7770D double wall oven user manual DG68-00856A-03, Information codes (Samsung download center)](https://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=UNI_CA&OriginYN=N&ModelType=N&ModelName=NV51K7770DS%2FAA&CttFileID=7281356&CDCttType=UM&VPath=UM%2F201904%2F20190417153009320%2FNV51K7770D_AA_DG68-00856A-03_EN-MES-CFR.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Same meaning in the NV51K7770D and NV51CG700D manuals. ## Samsung C-20 oven 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 oven off with OFF and restart it. If it comes back, it needs a visit. ### Does C-20 mean my Samsung oven needs a new sensor? Often, but the wiring and connector are checked too, because an open or shorted reading can start anywhere in the circuit. ### Can I bake while my Samsung shows C-20? The oven stops trusting its temperature reading, so baking results will not be reliable. Reset it once, then book a visit if the code stays. --- **[Read on the site: Samsung wall oven showing C-20 | OvenRepair.center](https://ovenrepair.center/error-codes/samsung-c-20/)** **[Book a visit with OvenRepair.center](https://ovenrepair.center/schedule/)**