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A blinking Heavy light on a Samsung dishwasher can signal different problems depending on the model. On models without an Express 60 cycle, Samsung says Heavy alone means the leak sensor detected moisture; on models with Express 60, it means there is too much water. Some Waterwall models without Express 60 may also blink Heavy when the water reflector is blocked. Check the model and every blinking light before deciding what to do.
First, identify the exact signal
Write down the dishwasher’s full model number and your country or market, then note whether Heavy is the only blinking indicator. Samsung’s light patterns and information codes vary by model, so the Heavy light alone is not a universal fault code.
Also distinguish a blinking Heavy indicator from Heavy simply being selected as the wash cycle. If the dishwasher has a digital display, check whether it shows an information code; models without a display may communicate a fault through blinking lights instead. Use the manual for your exact model if the displayed code or combination is not covered in Samsung’s general guidance. Samsung US: Dishwasher lights are blinking; Samsung US: Dishwasher information codes.
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| What you observe | Samsung-supported interpretation | What to do next |
|---|---|---|
| Heavy is the only blinking light; model does not have Express 60 | Samsung US says the leak sensor has detected moisture. | Check for visible water or leakage. If the dishwasher was recently moved, allow time for possible splash water near the sensor to dry. |
| Heavy is the only blinking light; model has Express 60 | Samsung US says there is too much water in the dishwasher. | Follow the model-specific manual or Samsung support guidance rather than treating it as the moisture-sensor diagnosis. |
| Heavy is the only blinking light; Waterwall model without Express 60 | Samsung Canada also lists a blocked water reflector as a possible cause. | Consult the Waterwall model’s manual for the appropriate check. |
| Heavy and one or more other lights blink | The combination may indicate a different condition; Samsung assigns meanings to specific light combinations. | Look up the complete pattern for the exact model instead of applying the Heavy-only interpretation. |
These interpretations come from Samsung support guidance, and the Canada page adds the reflector possibility for Waterwall models. They are not a universal diagnosis for every dishwasher sold in every region. Samsung US light-pattern guidance; Samsung Canada: Heavy light blinking.
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Safe checks to make before requesting service
- Look for visible water. If you see active leakage, stop using the dishwasher and follow the instructions for your model or contact Samsung service. A blinking indicator does not establish which component, if any, has failed.
- Consider a recent move. If there is no visible leak and the dishwasher was recently moved, Samsung Canada notes that splash water near the sensor may need time to dry. Avoid repeated resets as a substitute for finding or resolving the underlying condition.
- Check a recent garbage-disposal connection. If the disposal was newly installed or connected, verify that the dishwasher inlet cap was removed, following the relevant installation instructions.
- Check detergent use. Make sure detergent was not spilled outside the dispenser and that the dispenser was not overfilled.
- For a Waterwall model, consult its manual about the reflector. Samsung Canada lists a blocked water reflector as a possible reason for Heavy blinking on some Waterwall models without Express 60.
Samsung cautions that an unresolved cause may recur or damage the dishwasher. If the light remains on after the relevant checks, use the manual or contact Samsung support or service. Samsung Canada troubleshooting guidance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When the general Heavy-light explanation is not enough
- Other lights are blinking: identify the exact combination in the manual or Samsung’s model-specific support information.
- A numeric or alphanumeric code appears: use that information code and your model’s documentation; do not substitute a blinking-light explanation.
- The unit is visibly leaking or the indicator persists: stop relying on the Heavy-only interpretation and contact Samsung service as appropriate.
Samsung does not prescribe one replacement part for every blinking Heavy light. The symptom alone does not establish that the leak sensor, drain hose, pump, or another component needs replacement; that requires diagnosis for the specific model.
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