These Dacor cooktop A2 and UP codes both appear on the Samsung-era Modernist induction platform, documented in the same “Information codes” section as the cooktop’s sensor and communication problems, but they describe genuinely unrelated conditions.
A2: fan motor malfunction
A2 means the cooling fan motor is not behaving as expected — the DC motor may be physically blocked, or there may be a defect in the PCB or wiring driving it. This is documented as a Medium-severity problem, since the cooling fan protects the electronics from heat buildup rather than directly controlling a cooking zone, but a persistently blocked or failed fan can shorten the life of the components it is meant to protect.
UP: incoming voltage out of range
UP means the voltage actually reaching the cooktop sits outside the expected 208 to 240 volt range. This is not a problem inside the cooktop at all — it is the cooktop correctly reporting a problem with the household electrical supply feeding it. A dedicated circuit that is undersized, a loose connection at the panel, or a shared circuit under heavy load elsewhere in the house can all produce this reading.
Why confusing the two leads to the wrong fix
Treating a UP code as if it were a cooktop hardware problem sends a repair toward the wrong target entirely — no part inside the cooktop will resolve a genuine supply-voltage issue. Conversely, treating a physically blocked fan (A2) as an electrical-supply issue delays a straightforward mechanical fix: checking whether debris or a foreign object is obstructing the fan intake or exhaust.
What to check before calling, for each
For A2, listen for whether the fan runs at all when the cooktop is in use, and check visually for anything blocking the vent openings on the underside if accessible. For UP, this is genuinely an electrical question rather than an appliance question — confirming the circuit’s rated voltage and checking for other high-draw appliances sharing the same circuit is a reasonable first step, though correcting a supply issue is an electrician’s job, not a cooktop repair.
What neither code means
Neither A2 nor UP indicates a sensor failure (that is the separate C0/C1/C2 family) or a communication problem (F0/F1/F2). Keeping these four categories — sensor, communication, fan, and voltage — separate in your own head before calling saves a technician time confirming which subsystem is actually involved.
When to book service
A recurring A2 after confirming the fan is not physically obstructed points toward a motor or board-level repair. A UP code that persists after ruling out an obvious shared-circuit issue is worth having an electrician confirm supply voltage before assuming the cooktop itself needs service. Our cooktop error codes page covers the full nine-code table, and our cooktop appliance page covers current models. Schedule a visit with the exact code noted, and see Dacor’s own site for current cooktop specifications.
