Dishwasher Display Blinking / Flashing Lights: Causes, Error Codes & Fixes

Blinking dishwasher lights are a language: a single blinking light usually marks a state (paused, delayed, a cycle needing Start pressed), a blinking light PAIR or pattern is a fault announcement, and a fully flickering panel is a power/panel problem. This guide decodes the three cases by brand.

State blinking (not a fault)

Most dishwashers blink a light when the door was opened mid-cycle (press Start to resume), when Delay Start is counting down, or when a cycle finished hours ago. If pressing Start (door firmly closed) resumes normal operation, you were reading a state, not an error.

Pattern blinking (a fault in disguise)

Some brands announce faults as light patterns when no display exists — Samsung's combinations of Heavy/Normal/Express/Auto lights are the famous example (each pattern maps to a fault family: fill, drain, leak, heater, thermistor). Your brand's blinking-lights page (linked below for Samsung) translates the patterns.

Panel-wide flicker

All lights flickering, ghosting or rebooting = power quality at the outlet, a failing door-latch power contact (the latch carries the panel's power on many models — a marginal latch flickers the whole panel), or a dying control. A latch that needs a firmer push to keep lights steady has told you its diagnosis.

Bosch: flashing lights, the tap symbol and the E-codes behind them

Bosch causes more confusion on this symptom than any other brand, because Bosch runs two reporting systems at once and owners meet whichever one their model happens to have. Models with a display do not really 'blink a code' — they show one: the E-code family this site covers in depth, where E15 means the water protection system has activated, E24 and E25 concern draining and the drain pump, E09 concerns the heating circuit, and E22 a blocked filter system. Bosch's own instruction for E15 is the strictest on this page and should be followed literally: close the water tap, switch the appliance off, and book an engineer rather than investigating at home, because the code means water has reached the base tray where it does not belong. Display models also carry one non-letter reporter, the water tap symbol, which Bosch's support pages assign to the fill side — a kinked or blocked supply hose, low incoming pressure, or a blocked filter in the supply path — and Bosch quantifies the pressure check at roughly ten litres a minute from the fully open tap. Models without a display are the true 'Bosch dishwasher flashing lights' case: faults surface as indicator lights, including the check-water light doing duty for fill, drain and leak families on simpler ranges, and the reliable translation lives in that model's manual or its diagnostic routine, not in a generic blink chart. Whichever system your Bosch has, Bosch's published owner checks for the drain family are the same three this site's E24 page works through: wash the filter under running water, lift the pump cover and clear debris, then refit the cover so it clicks home; check the hose for kinks; and check the air gap or run the hose into a bucket to separate machine from plumbing.

Frigidaire: the status-lights flash the manual actually documents

Frigidaire owners searching 'blinking error code' are often looking at a behaviour Frigidaire's own manuals describe as entirely normal, and it is worth ruling out before any fault theory. The manual's troubleshooting entry is headed 'Status Lights Flashing' and it says this: when the dishwasher is first installed, or when power to it has been interrupted, the HI-TEMP WASH and HEAT DRY OFF status lights will flash. The documented remedy is a single action — press the START/CANCEL pad to clear them. The same manual tradition covers the mid-cycle version: if a power failure occurs during a cycle, the dishwasher must be restarted by reselecting the cycle you want, and the related PF display on code-equipped models is this site's verified shorthand for exactly that event, a power failure notice rather than a component fault. So the first Frigidaire question is chronological, not technical: did the flashing begin at installation, after a breaker trip, after a storm, or after anyone cut power at the panel? If so, clear it the manual's way and run a normal cycle before diagnosing anything. Frigidaire separates this state-flashing from its genuine fault reporting, which on display models takes the i-code form covered across this site — i10-family fill reports, i20-family drain reports, i30-family leak and flood reports among them — and on light-only models takes the form of specific named lights behaving abnormally, which the next section separates from the power-interruption pattern.

Frigidaire flashing lights that do mean something

Once the installation and power-interruption flash is cleared away, three Frigidaire light behaviours carry real information, and each points at a different system. The first is the Start or Start/Resume light flashing on a machine that will not begin: Frigidaire's long-standing guidance ties that blink to the door — the machine will not start because it cannot confirm the door is fully closed and latched, so the checks are physical before they are electrical: racks pushed fully in, nothing tall catching the top of the door, the latch meeting its strike cleanly, and the door pressed until the latch engages, then Start pressed again. A latch switch that has failed electrically produces the same blink with a perfectly closed door, which is why a machine that still refuses after a firm, unobstructed close has moved from owner checks to a latch or control diagnosis. The second behaviour is the Clean light blinking, which Frigidaire's troubleshooting tradition assigns to the water-heating side — classically, incoming water too cool for the cycle's requirements, checked by running the kitchen hot tap and confirming the home's hot water is genuinely hot before suspecting the machine's heater. The third is pattern flashing accompanied by a pump that runs and runs or a machine that stops with water standing in it: that is the light-side expression of the i-code families, and the working route is the drain and leak route from this site's Frigidaire pages — filter and glass trap first, then hose and sink path, with a leak-family report treated as water where it should not be until proven otherwise. What none of these three behaviours is, is a reason to keep pressing pads: repeated inputs during a fault state can stack commands on some models, and Frigidaire's own reset habit — a clean power interruption at the breaker, a pause, then one fresh selection — is the orderly version.

Samsung's light patterns: the no-display code system

Samsung is the brand the base guide names for pattern blinking, and its system deserves a full section because on Samsung models without a display the lights are not a vague warning — they are the code, printed in the manual as combinations of cycle lights. The patterns verified on this site's Samsung dishwasher pages divide into recognisable families. One family reports water where it should not be: the pattern Samsung's documentation ties to its leak sensing, where moisture at the sensor — from a genuine leak, from water splashed near the sensor when the machine was recently moved, or from an overfilled dispenser — lights the relevant combination and stops the machine protecting itself. A second family reports supply: a fast-blinking pattern Samsung assigns to incorrect water pressure or temperature, with the maker's checks being the supply valve fully open, the incoming water meeting the machine's requirements — and, specifically in Samsung's guidance, not fitting an incompatible Floodsafe-type hose, which can throttle fill until the control complains. A third family reports drainage, pairing its pattern with the checks you would expect from Samsung's displayed 5C-family codes: a drain hose pinched or kinked, particularly after the machine has been moved, and blockages along the drain path. The practical method with any Samsung pattern is to photograph the lit combination before touching a pad, then match it against the model's manual chart — Samsung uses the same light hardware across many models with meaningfully different charts, so a combination memorised from a previous Samsung is evidence, not proof. Owners with display models should use the displayed code instead and ignore the light combinations entirely; Samsung runs both systems in parallel across its range, and mixing the two translations is a reliable way to fix the wrong system.

The door-latch thread that runs through every brand

Read across Bosch, Frigidaire and Samsung and one component keeps appearing behind 'flashing lights' complaints on machines of every reporting style: the door latch. The reason is architectural. On many dishwashers the latch is not merely a catch; it carries or confirms the electrical state the control needs before it will run anything, so a latch that is marginally engaged — worn, fouled with dried detergent and food soil, knocked out of alignment by a rack that overhangs, or simply not pushed the last few millimetres — produces exactly the symptoms this page collects: lights that blink or flicker, a Start light that flashes and refuses, a panel that behaves as though power is unstable, or a cycle that pauses as though the door had been opened because, electrically, it has. The base guide's test remains the sharpest owner-level instrument available: if a firmer, deliberate push on the door steadies flickering lights or lets a cycle start and hold, the latch assembly and its alignment have confessed, and no amount of breaker-resetting will cure a mechanical contact that opens under vibration. Work the free checks in order — door closing against nothing, racks fully home, latch and strike visibly clean and undamaged, strike screws tight — and note the pattern across cycles: a machine that starts cold and faults warm, or faults only on heavy loads when the tub flexes, is describing an intermittent latch contact rather than an electronic failure. Beyond those checks the latch becomes a meter test on its switches, which is technician territory on most models; what owners should not do is defeat the latch or tape a switch closed, because that interlock is also the thing standing between a running wash pump and an opened door.

Resetting a blinking dishwasher — what a reset can and cannot do

Every brand on this page offers some version of a reset, and the blinking-light context is where resets are most often misused, so their honest scope is worth stating once. A reset — Frigidaire's START/CANCEL clear, a breaker-off pause on any brand, Bosch's documented reset routine after its owner checks — does exactly one thing: it clears the control's current state and any latched display. That is the complete cure for state blinking (paused, delayed, power-interrupted) and for the one-off electronic hiccup, and it is no cure at all for a standing physical condition. The diagnostic value of a reset is therefore in what happens next, timed: a blink that returns at the same cycle stage on the next run is the machine re-detecting the same condition — fill timing out, drain timing out, water at a sensor — and its stage is the information, not an invitation to reset again. A blink that returns instantly at power-up, before any cycle is selected, points away from cycle conditions entirely, toward power supply, the latch circuit, or the control itself. And a blink that never returns after one reset, across several normal cycles, can fairly be filed as an event rather than a fault. Two disciplines protect the evidence: photograph or film the pattern before the first reset, because light codes vanish with state exactly as display codes do; and reset once, then observe a full cycle, rather than cycling power repeatedly — repeated hard restarts can mask an intermittent fault just long enough to make a technician's visit unproductive, and on a leak-family report each restarted cycle is another opportunity to put water in the base.

Blinking plus behaviour: reading the combination

The lights alone rarely finish a diagnosis; the lights plus what the machine is physically doing usually do, and the combinations are few enough to learn. Blinking with a drain pump that runs continuously, even with the door open on some models, is the leak-protection signature across brands — Bosch's E15 behaviour and its equivalents — and the correct response is water off and investigation of the base, not a reset, because the pump is running to protect the floor, not because it is confused. Blinking with a machine that fills, washes briefly and stops with dirty water standing in the tub is the drain family performing live: filter system, pump, hose and sink path, in the order this site's not-draining guide works them. Blinking with a machine that never admits water at all is the fill family: tap, hose, inlet filter and pressure, the checks behind Bosch's tap symbol. Blinking with normal washing but cold dishes and no drying is the heating family's quiet version. And blinking with nothing at all — no fill, no pump, no wash motor, a machine that only blinks — is the power-and-latch-and-control triangle from the sections above. Two combinations override all others and end owner work on the spot: any blinking accompanied by water on the floor or a burning or electrical smell means power off at the breaker and water off at the tap before any further curiosity, and a panel that blinks in time with lights dimming elsewhere in the house is reporting a household supply problem that no dishwasher part will fix — that one is an electrician's call, made with the machine left off.

When blinking lights mean stop and call

Most of this page is owner-tractable, but the symptom has clear edges, and crossing them calmly is part of using it well. Stop and call a technician when the pattern decodes to a leak-family or water-protection report and water is confirmed in the base or on the floor — Bosch's own published position on E15 is that owners should not attempt the resolution at home, and the same respect is due every brand's equivalent, because the leak's source, not its symptom, is the repair. Stop when the panel-wide flicker survives a proven outlet, a firm latch and one clean power reset: the remaining suspects are the control and the wiring between latch and board, both meter-and-panel work. Stop when a heating-family blink pairs with lukewarm water verified at the tap as properly hot — the heater circuit and its sensor are internal, model-specific, and tested live by people equipped for it. And stop whenever getting to the next check requires pulling the machine out and disconnecting anything: hoses under pressure, hardwired electrical connections and gas-adjacent work on neighbouring appliances are all outside the owner envelope this site writes for. What to hand the technician is the product of everything above: the photographed pattern or code, the cycle stage it appears at, what the machine was physically doing, and what changed recently — a move, a new disposal, a power cut, plumbing work. That handover routinely saves the first half-hour of the visit, which on the cost structure of the companion guide to this page is real money — and it is the practical reason this symptom, photographed and described well, is one of the cheapest faults on the site to have repaired.

Key takeaways

• Photograph the pattern — light codes are as perishable as display codes.
• On any brand: door fully latched + Start pressed eliminates the state cases before you diagnose faults.

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