What to check yourself
Step 1. If the machine is new, look for packing tape
Check this first on a machine that has never completed a cycle, because it is the single most common cause and it costs nothing. Samsung ships the reflector taped down, and the tape is clear. People unpack the machine, see nothing on the reflector and install it. Run a finger along the bar at the bottom of the tub and you will find the tape by feel long before you see it.
Step 2. Take everything out and look at the bar
The reflector runs the width of the tub along the floor. A pot handle hanging through the bottom rack, a knife that slipped through, a long spatula, a fallen lid: anything sitting in that track stops it dead. Empty the machine completely rather than peering past the dishes.
Step 3. Check the reflector is seated the right way up
The detail that gets missed after cleaning. The reflector lifts out for washing, and it goes back with the Waterwall logo facing upwards. Upside down it fouls its track and reports exactly this. Take it out and put it back deliberately.
Step 4. Clear the track and check it slides by hand
With the tub empty, push the reflector gently from one end to the other. It should move smoothly. Grit in the track, or a build up of hard water scale, makes it stiff. Wipe the track out and try again.
Step 5. Reset and run an empty cycle
Power off for five minutes, then a short cycle with nothing in the machine. It confirms whether the obstruction was the whole story before you load it up again.
What a technician will look at
Described so you know what you are paying for, not as steps to repeat.
Test the reflector motor and its position sensor
If the track is clear and the reflector moves freely by hand, what is left is the motor that drives it and the sensor that tells the board where it is. Both are under the tub and need the machine out.
When to call a technician
When the tub is empty, the track is clear, the reflector is the right way up and slides freely, and the code still appears. Up to that point the odds strongly favour something in the way rather than something broken.
What the repair costs
| Repair | Part only | Fitted by a technician |
|---|---|---|
| Removing packing tape or an obstruction | - | Free |
| Reseating the reflector the right way up | - | Free |
| Diagnosis alone | - | $75 to $130 |
| Reflector motor or assembly replacement | - | $175 to $350 |
A new machine of the same class runs $500 to $1,500. Once a quote passes about a third of that on an older appliance, the repair stops making sense.
Codes people confuse this with
Questions people ask
- What is the Waterwall reflector for?
- Instead of a spinning arm throwing water in circles, these machines shoot water at a reflector that slides along the floor of the tub, sweeping a wall of water from front to back. It cleans more evenly, and it adds a moving part that can be blocked.
- The machine is brand new and has never worked. Is it faulty?
- Probably not. Clear packing tape left on the reflector is the most common cause of this code on a new installation, and it is nearly invisible. Feel along the bar before arranging a warranty visit.
- Can I run it with the reflector taken out?
- No. It is the part that directs the water, so without it the machine sprays into the tub floor and washes nothing.
Which machines this applies to
Applies to
Samsung dishwashers with the Waterwall system, which covers much of the DW80 range. Machines with conventional rotating spray arms do not have this part and never show this code.
Last checked
2026-08-10