Before assuming the auto-dispensing system is faulty, make sure it is enabled for the cycle, the product is compatible, and the tank is seated correctly. The smell of the laundry does not tell you how much detergent was dispensed.
Rule out settings and product supply
- Check the manual to confirm the program supports the feature and that it is selected.
- Review the concentration and dose settings for the product being used.
- Check that it is filled, that the correct container is installed, and that the tank is seated properly without exceeding the indicated marks.
- Perform only the auto-dispensing cleaning authorized for that model.
A conventional dispenser drawer that leaves product behind requires diagnosis of detergent dispensing and carryover; it does not mean there is an automatic pump.
How to interpret the refill alert
A full tank with an alert does not confirm a faulty sensor. On the units described in this Samsung help article, the alert may remain until the next dose. Check the expected behavior for your model.
If the lack or excess persists with the correct settings, the technician must distinguish between suction, air in the circuit, blockages, the pump, and level detection according to the design.
When it needs repair
The repair may affect the lines, dosing assembly, or electronic control. The diagnosis and replacement part identification must specify which component is supplied and how the dispensed amount is verified.
Do not perform a universal purge, insert tools into ports, or open sealed cartridges. If the manual allows a manual dosing alternative, follow its conditions to avoid a double dose.
Record the product, selected concentration, cycle, and exact message: that combination helps distinguish a pending alert from a persistent lack of dispensing.