A Cove dishwasher that shows absolutely no response whatsoever when you press the start button — no lights, no sounds, nothing indicating the unit is receiving power or attempting to do anything at all — can feel like a serious and expensive problem right from the start. In practice, though, working through a methodical sequence of checks, starting with the simplest and most common explanations before assuming anything more involved, resolves the majority of these situations without needing a service call at all.
Order matters here more than usual. One of the causes below is documented as surviving a power cycle completely, so reaching for the breaker too early tells you nothing and costs you the afternoon.
Power delivery is always the right place to start, before assuming anything internal to the dishwasher itself has failed. Check the breaker panel first to confirm the circuit serving the dishwasher hasn't tripped, since this is both the simplest possible explanation and one that's easy to overlook if you're not in the habit of regularly checking your panel. From there, confirm that the door is fully closed and properly latched, since essentially all modern dishwashers, Cove included, are designed with a safety interlock that prevents any cycle from beginning unless the door registers as securely closed — a door that looks closed to the eye but hasn't fully latched will produce exactly this "completely unresponsive" symptom.
Worth knowing: a Cove runs on a dedicated 15-amp circuit. If the breaker trips again shortly after you reset it, stop resetting it. A breaker doing its job repeatedly is reporting a fault, not being temperamental.
If power and door status both check out as normal, the next thing worth investigating is whether a child lock or control lock feature has been accidentally activated. It is a genuinely common and easily overlooked cause of an apparently completely dead control panel — the panel isn't actually dead at all, it's simply locked and refusing to respond to normal button presses as a safety measure.
On the DW2450 the answer is specific: touch and hold Heavy for 10 seconds or more. The same gesture turns it on and off, and the display confirms with "Child Lock: Off". If the machine is locked, the panel shows "Locked" rather than going blank, so a genuinely dark display points elsewhere.
Here is why this check belongs before the power cycle rather than after it: Cove's documentation states plainly that cycling the power does not change Child Lock status. Neither does a power outage. Only the button gesture or a Reset All exits it. Someone who works through breaker checks first will conclude the board is dead when the machine is behaving exactly as designed.
If neither a tripped breaker, an improperly latched door, nor an activated control lock explains the lack of response, a full power cycle at the breaker is worth trying next. Cutting power completely for a full sixty seconds, then restoring it and allowing the control board adequate time to fully reboot before attempting to start a cycle again, clears a meaningful number of control board glitches that can cause exactly this kind of total unresponsiveness without reflecting any genuine hardware failure.
If you've worked through all of these steps in order — confirming the breaker, checking the door latch, ruling out an activated lock feature, and trying a complete power cycle — and the dishwasher still shows absolutely no response to any button presses whatsoever, you're likely dealing with an actual control board failure or a door switch that's failed in a way that's preventing the safety interlock from ever registering as satisfied, even with the door properly closed and latched. At that point, continued troubleshooting on your own isn't likely to identify the specific failed component without proper diagnostic equipment, and bringing in a technician for a proper diagnostic assessment is the more efficient path forward.
A useful distinction for the call: a failed door switch usually leaves the panel alive — lights respond, the machine simply refuses to start. A dark, silent panel after confirmed power points at the board instead. Which one you describe changes what the technician brings.
Touch and hold Heavy for 10 seconds or more. The display confirms with "Child Lock: Off". The same gesture locks it again, which is how it usually gets switched on by accident in the first place.
No. Cove's documentation is explicit that cycling power, and even a power outage, leaves Child Lock status unchanged. Only the button gesture or a Reset All exits it — which is exactly why this check belongs before the breaker rather than after.
No, and the difference is useful. A lit panel means the board has power and is running; something is refusing to satisfy a start condition, most often the door interlock. A completely dark panel with confirmed power at the breaker is a different fault, and a more serious one.
Leave it off and call someone. A breaker that trips repeatedly is detecting a genuine electrical fault — in the appliance or in the circuit — and repeatedly resetting it defeats the one component protecting your kitchen.
Yes, and a more tractable one. A machine reporting a code is communicating, which is better than silence. Our guide on what it means when a Cove code will not clear covers what to do next, and the code table explains what each one is reporting.
Worked through all four and still nothing? That is a control board or door switch, and neither is diagnosable from the kitchen floor. We service Cove throughout Arlington, Alexandria and the surrounding Northern Virginia communities, plus Washington, DC and Potomac, Maryland — book a diagnostic visit and tell us which of the two symptoms you have.
We serve Arlington, Crystal City, Rosslyn, Ballston, Pentagon City, Clarendon, and surrounding Northern Virginia communities.
Learn more about our Cove repair services →