--- title: "Viking electric cooktop showing FO | CooktopRepair.center" description: "What FO means on Viking electric cooktops, what to check before booking, and when it is not a failure at all." url: "https://cooktoprepair.center/error-codes/viking-fo/" --- # Viking electric cooktop showing FO On a Viking Designer electric cooktop, FO is a software error. ## What FO actually means. On a Viking Designer electric cooktop, FO is a software error. The control stops the elements when its own program does not run as expected. Viking cooktop display What to do when FO shows on the cooktop ### Kind of code Boards and communication The touch board and the power board under the glass lost track of each other, or one failed its own start-up check. A power dip, a ribbon or harness pulled loose when the top was fitted, or moisture from a boil-over is ruled out before a board is replaced, and a cooktop that keeps heating while this code shows is switched off at the breaker. ### Usually leads to Touch control repair Glass touch keys and sliders that ignore a finger, start zones by themselves or stay locked, traced to the keys, the control board or the lock setting. ### Shows up as Cooktop Controls Unresponsive Touch keys or a slider do nothing, the display lights but ignores every press, or a knob turns without starting its burner or element. ### Make Viking A Mississippi maker of pro-style kitchens whose US site lists both cooktops and rangetops. ### Source Viking Designer electric cooktop use and care manual, Error Codes Viking Designer built-in electric cooktops with touch controls, per the use and care manual F20699. Other Viking cooktops use different displays. ## Before you book, in this order. Each step comes from Viking's own guidance for FO on its cooktops. Follow it to the end: the last card says whether this is a visit. 01 Switch the breaker off for a minute and back on. 02 Book a visit if FO shows again. 03 Write down whether FO appeared at switch-on or partway through cooking, and pass that on when you book. ### Still there? It usually turns into [touch control repair](https://cooktoprepair.center/services/touch-control-repair/). Book with the code and the model number. ### What not to do FO is not caused by the pan, the elements or spills on the glass. It comes from the control's own software. ## What you may notice with it. The cooktop problems FO tends to arrive with. Answer these at the cooktop before anyone is booked. [All problems](https://cooktoprepair.center/problems/) Before you call ### [Cooktop Controls Unresponsive](https://cooktoprepair.center/problems/cooktop-controls-unresponsive/) [All 5 causes, cheapest first](https://cooktoprepair.center/problems/cooktop-controls-unresponsive/) It also comes with - [**Cooktop Error Code**](https://cooktoprepair.center/problems/cooktop-error-code/) Problem ### Cooktop Controls Unresponsive 5 causes, cheapest first Where FO usually leads ## Touch control repair. **Touch control board or key panel · moderate.** Book a visit [What the job involves](https://cooktoprepair.center/services/touch-control-repair/) ## Viking cooktops. A Mississippi maker of pro-style kitchens whose US site lists both cooktops and rangetops. [Viking cooktop repair](https://cooktoprepair.center/brands/viking/) More Viking codes [FA](https://cooktoprepair.center/error-codes/viking-fa/) [FE](https://cooktoprepair.center/error-codes/viking-fe/) [Fc](https://cooktoprepair.center/error-codes/viking-fc/) [Fr](https://cooktoprepair.center/error-codes/viking-fr/) [FH](https://cooktoprepair.center/error-codes/viking-fh/) [FL](https://cooktoprepair.center/error-codes/viking-fl/) [Fb](https://cooktoprepair.center/error-codes/viking-fb/) [F5](https://cooktoprepair.center/error-codes/viking-f5/) [Fd](https://cooktoprepair.center/error-codes/viking-fd/) [L](https://cooktoprepair.center/error-codes/viking-l/) Boards and communication on other makes [BlueStar E](https://cooktoprepair.center/error-codes/bluestar-e/) [Bosch E7010](https://cooktoprepair.center/error-codes/bosch-e7010/) [Café F + number (flashing)](https://cooktoprepair.center/error-codes/cafe-f-code/) [Dacor F0](https://cooktoprepair.center/error-codes/dacor-f0/) [Frigidaire C0](https://cooktoprepair.center/error-codes/frigidaire-c0/) [Fulgor Milano Er47](https://cooktoprepair.center/error-codes/fulgor-milano-s700-er47/) [Gaggenau E7010](https://cooktoprepair.center/error-codes/gaggenau-e7010/) [GE Profile F + number (flashing)](https://cooktoprepair.center/error-codes/ge-profile-f-code/) [All 48 codes of this kind](https://cooktoprepair.center/error-codes/#family-communication) Viking builds this ### Gas cooktop A gas cooking surface dropped into a countertop cutout, with its gas line and power cord running down into the cabinet underneath. Viking builds this ### Electric cooktop A coil or smooth-glass radiant cooking surface built into the countertop and wired to its own circuit in the cabinet or wall behind it. Viking builds this ### Induction cooktop A glass cooktop in the counter that heats the pan itself through magnetic coils, run by power boards and cooled by a fan underneath. ## In Viking's own words > FO Software error [Viking Designer electric cooktop use and care manual, Error Codes](https://vikingrange.com/file/750/m3500139_F20699.PDF) [Viking Designer electric cooktop use and care manual, Error Codes](https://vikingrange.com/file/750/m3500139_F20699.PDF) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Viking Designer built-in electric cooktops with touch controls, per the use and care manual F20699. Other Viking cooktops use different displays. ## Viking FO cooktop 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 breaker off for a minute and back on. If it comes back, it needs a visit. ### Can I update the software on my Viking cooktop to clear FO? No owner update is described in the manual. A reset is worth one try; a returning FO points to the control board. ### Is FO a letter O or a zero? Viking prints it as F and the letter O. Read it carefully, because other F codes use letters too. ### Does FO on a Viking Designer electric cooktop stop every element at once? When the control declares FO it stops all the heating elements at once, because its own program is not running as expected. Nothing heats again until a reset clears the code or the board is repaired. --- **[Read on the site: Viking electric cooktop showing FO | CooktopRepair.center](https://cooktoprepair.center/error-codes/viking-fo/)** **[Book a visit with CooktopRepair.center](https://cooktoprepair.center/schedule/)**