If the Samsung DW80B7070 does not fill, the manual's own code for it is 4C: a water supply check. Its instruction is to check whether the water supply valve is closed, clogged or frozen and whether the supplied pressure is less than required, and if the problem continues, close the water supply valve and contact an authorized Samsung service center. The troubleshooting table adds that the pressure should be between 20 and 120 psi (140 to 830 kPa) and that the dishwasher may not operate at all if the water supply valve is not open.
Differential
Likely causes of “Samsung dishwasher will not fill with water”, and how to tell them apart
- 1
The water supply valve is closed
What separates it 4C shows and no water enters because the water supply valve is closed
How to confirm Open the water supply valve fully, and start the cycle again
- 2
The supply valve or line is clogged or frozen
What separates it The valve is open but little or no water flows
How to confirm Check the valve and line for a clog or ice; do not force it
- 3
Low water pressure
What separates it Water enters slowly and 4C appears because of low water pressure
How to confirm Check pressure is between 20 and 120 psi (140 to 830 kPa)
- 4
A door not latched or the START button not pressed
What separates it The dishwasher does not start and never fills because the door is not latched or the START button was not pressed
How to confirm Latch the door, check the upper rack is joined to the duct nozzle and press START
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether 4C shows on the display, and when it appears
- Whether the supply valve is fully open and other taps have good pressure
- Whether the supply line could be frozen
Try in this order
0 of 5 completedRead 4C
Reversible4C is the water supply check. Check whether the water supply valve is closed or clogged, or is frozen, and whether the supplied water pressure is less than required.
Open the valve
ReversibleOpen the water supply valve fully. The troubleshooting table lists the valve as a reason the dishwasher won't operate at all.
Check pressure
ReversibleCheck that the supplied pressure is between 20 and 120 psi (between 140 and 830 kPa) by testing another cold tap.
Check the door and upper rack
ReversibleCheck the door is latched and closed completely and that the upper rack is properly joined to the duct nozzle and is not crooked or unbalanced.
Press START and close the door
ReversiblePress the START button before closing the door, and close it within 3 seconds; the cycle starts after draining for a few seconds.
Model-specific
What is true of this model and not of its siblings
- Starting a cycle
- The simple steps: load the dishwasher, add detergent and rinse aid, press POWER, select a cycle and options, then press START and close the door within 3 seconds. If you change the cycle after selecting an option the original option is reset. To resume after opening the door, press START first and then close the door.
- Parts for this problem on the DW80B7070 (RepairClinic, 2026-09-21)
- water inlet valve, with garden hose water supply, part number DD33-01002B, at $172.73; sensor-tur, part number DD32-00008A, at $201.22; drain hose, part number DD97-00403E, at $90.25.
- Other models this page answers
- These steps also fit models DW80B6060, DW80R7060, DW80M9550, DW80N3030, DW50T6060.
Stop boundary
When this stops being a self-service repair
- !If 4C continues, close the water supply valve and contact an authorized Samsung service center as the manual says
- !If the supply line is frozen, thaw it safely before running the dishwasher
Evidence ledger
Sources behind this answer
Samsung's own support page listing this model's manuals.
Samsung's own short user manual for these dishwashers to confirm the control-panel and code names.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-21.
Exact questions
Common questions
What water pressure is required?+
20 to 120 psi (140 to 830 kPa).
What if 4C continues?+
Close the supply valve and contact an authorized Samsung service center.
Can the upper rack stop it?+
Yes. The manual says to check the upper rack is properly joined to the duct nozzle and not crooked.
Does the dishwasher drain first?+
Yes. After START and closing the door, the cycle starts after draining for a few seconds.
Can a cold supply matter?+
It needs a hot supply; cold water lengthens cycles rather than blocking filling.
Can ice block the line?+
Yes; a frozen valve or line causes 4C.