--- title: "Wolf M Series wall oven showing 2420 | OvenRepair.center" description: "What 2420 means on Wolf M Series wall ovens, what to check before booking, and when it is not a failure at all." url: "https://ovenrepair.center/error-codes/wolf-2420/" --- # Wolf M Series wall oven showing 2420 2420 is logged when the relay board of an M Series oven sees something wrong in the RTD circuit, the resistance-type sensor the oven reads to hold its set temperature. ## What 2420 actually means. 2420 is logged when the relay board of an M Series oven sees something wrong in the RTD circuit, the resistance-type sensor the oven reads to hold its set temperature. Until that reading is trusted, the control cannot regulate heat properly. Wolf oven display What to do when 2420 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 Wolf The cooking brand of the Wisconsin-based Sub-Zero Group, making wall ovens, convection steam ovens and speed ovens. ### Source Wolf answer: M Series oven, relay board RTD circuit (2420) Wolf M Series wall ovens. ## Before you book, in this order. Each step comes from Wolf's own guidance for 2420 on its ovens. Follow it to the end: the last card says whether this is a visit. 01 Switch the oven's breaker off for about 30 seconds, turn it back on and run the oven again. 02 If 2420 returns, do not rely on the oven for cooking that needs an accurate temperature; book a visit. ### 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 2420 is not a sign that the oven merely runs a few degrees hot or cold. It reports a circuit problem, and a small calibration offset in the settings will not clear it. ## What you may notice with it. The oven problems 2420 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 2420 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/) ## Wolf ovens. The cooking brand of the Wisconsin-based Sub-Zero Group, making wall ovens, convection steam ovens and speed ovens. [Wolf oven repair](https://ovenrepair.center/brands/wolf/) More Wolf codes [1231](https://ovenrepair.center/error-codes/wolf-1231/) [0821](https://ovenrepair.center/error-codes/wolf-0821/) [0B31](https://ovenrepair.center/error-codes/wolf-0b31/) [5021](https://ovenrepair.center/error-codes/wolf-5021/) [6D10](https://ovenrepair.center/error-codes/wolf-6d10/) [4910](https://ovenrepair.center/error-codes/wolf-4910/) [E67](https://ovenrepair.center/error-codes/wolf-e67/) [E73](https://ovenrepair.center/error-codes/wolf-e73/) [E115](https://ovenrepair.center/error-codes/wolf-e115/) 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) Wolf 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. Wolf 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. Wolf builds this ### Steam oven A built-in oven that adds water vapor to the cavity, alone or with convection heat, fed from a tank or a water line. ## In Wolf's own words > Cause: Relay board RTD circuit fault [Wolf answer: M Series oven, relay board RTD circuit (2420)](https://www.subzero-wolf.com/assistance/answers/wolf/m-series-oven/m-series-wall-oven-fault-code-2420) [Wolf answer: M Series oven, relay board RTD circuit (2420)](https://www.subzero-wolf.com/assistance/answers/wolf/m-series-oven/m-series-wall-oven-fault-code-2420) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Wolf M Series wall ovens. ## Wolf 2420 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's breaker off for about 30 seconds, turn it back on and run the oven again. If it comes back, it needs a visit. ### Will adjusting the temperature offset fix 2420 on my Wolf? No. 2420 is about the sensor circuit the relay board reads, not about a small drift you can dial out. If a breaker reset does not clear it, the circuit itself needs checking. ### Is it safe to cook while my Wolf oven keeps showing 2420? The oven cannot hold temperature reliably while it doubts its own sensor reading. Switch it off, try the breaker reset once, and book a visit if the code returns. --- **[Read on the site: Wolf M Series wall oven showing 2420 | OvenRepair.center](https://ovenrepair.center/error-codes/wolf-2420/)** **[Book a visit with OvenRepair.center](https://ovenrepair.center/schedule/)**