Foundry Line Appliance — +1 (904) 605-5889 Jacksonville averages about 68 thunderstorm days a year. Here is what that does to appliance electronics, and how we tell a surge from a slow failure. Source: https://jaxviking.com/shop-notes/storm-season-control-boards/ --- - Home / - Shop Notes / - Shop Note 005 Shop Note 005 # Storm Season and the Control Board A board that died during a storm and a board that has been getting stranger for months are two different repairs. The history matters. ![Yellow multimeter reading a green control board through the opened base grille of a built-in refrigerator](/img/control-board-01.webp) A board that survives a surge often fails weeks later, not that night. Posted August 11, 2026 Jacksonville averages roughly sixty-eight thunderstorm days in a year. Not sixty-eight storms — sixty-eight days on which thunder is heard. Through the summer that is most afternoons, and it goes on for months. Appliance electronics sit at the far end of a long branch circuit with no protection of their own. A strike does not have to hit the house to matter. A strike into the ground nearby, or into distribution equipment down the street, puts a transient on the line, and a transient does not care that your oven is switched off. ## What a surge actually does Rarely does it destroy a board outright with a scorch mark you can see. Far more often it takes out one component — a relay driver, a triac, a low-voltage supply section — and leaves the rest working. That produces the failures that sound absurd on the phone. An oven that heats on bake and not on broil. A refrigerator whose compressor runs but whose ice maker has forgotten it exists. A hood with working lights and a dead fan. A control panel that responds to some buttons and not others. In every one of those, power is clearly arriving and most of the machine is clearly alive, which is why owners assume it must be something small. Sometimes it is the board, and one channel of it. ## Telling a surge apart from a slow failure The history is the diagnostic. We ask two questions before we open anything. Did it stop working during or immediately after a storm, cleanly, with no warning? That is consistent with a transient. Or has it been getting gradually stranger over weeks or months — intermittent at first, then more often, then permanent? That is not a surge. That is a connection going high-resistance, a sensor drifting out of range, or a relay whose contacts are pitting. Those look like board faults and are not. The second pattern is much more common than the first, and it is where most unnecessary boards get sold. So we check the harness connections, the sensors and the elements before we accept a board diagnosis, regardless of what the weather did. ## Heat and humidity are the quieter half Storms are the dramatic part. The mundane part is that this is a hot, humid climate for half the year, and electronics age faster in it. A control mounted behind a cooking cavity is living at elevated temperature every time the oven runs. A board in a garage or an outdoor kitchen is living in ambient humidity with no conditioning at all. That is why appliance electronics in Jacksonville do not last as long as the same parts in a dry, cool climate, and it is honest to say so rather than treat every failure as bad luck. ## What we recommend, and what we do not We recommend surge protection at the panel for a house with several thousand dollars of appliance electronics in one kitchen. It is an electrician’s job, it is not expensive relative to what it protects, and it protects everything rather than one outlet. We do not recommend replacing working boards preventively, and we do not sell maintenance plans. If your control is behaving, leave it alone. ## Availability, and the honest part Electronic control boards for professional appliances are not always quick to get, and lead times vary. If we diagnose one, you will get a written estimate with the part cost and the current lead time on it before anything is ordered, so you can decide with real information instead of finding out afterwards. Flat diagnostic, credited toward the repair if you approve the work. Genuine OEM parts, ninety days on labor and a year on parts. We are an independent appliance repair company and we are not affiliated with, authorized by or endorsed by the manufacturer. Related ## The work this belongs to Wall Ovens ### Viking Wall Oven Repair in Jacksonville Elements that open up, sensors out of range, and doors that will not stay square. Single and double wall ovens, built in. 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Book the visit ## Tell us the model. We bring the part. Viking only. Duval County, citywide. Flat $129 diagnostic. It is credited toward the repair if you approve the work. Call +1 (904) 605-5889 Send the details - Diagnostic: $129 flat - Labor: 90 days on labor - Parts: 365 days on parts - Weekdays: Mon–Fri, 8am–6pm - Saturday: Sat, 9am–4pm --- Foundry Line Appliance. To book a visit, telephone +1 (904) 605-5889. Foundry Line Appliance is an independent appliance repair company. We are not affiliated with, authorized by, or endorsed by Viking or its parent company. All brand names and model numbers are the property of their respective owners and are used only to identify the appliances we service.