- Appliances
- Dishwashers
4E
Samsung 4E on a dishwasher: water supply problem
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
On a Samsung dishwasher, 4E or 4C means a water supply problem: not enough pressure or temperature. Check that the dishwasher supply valve is open and that there is no water outage in the house.
Safety first
Stop and check this first
- Samsung warns that water above 149 °F can cause severe burns: do not raise your household water heater temperature to try to clear the code.
Safe checks you can perform
- Supply valve and household water
- Inlet hose
- Water pressure and temperature
Leave these tasks to a qualified professional
- Do not attempt this professional task: Inlet valve and filter check
- Do not attempt this professional task: Fill test after the repair
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Inlet valve and filter check
What they doWith the unit disconnected, the technician cleans the inlet filter, checks the supply valve and its connection and rules out a defective valve against Samsung specification.
They must show youthe removed filter and the valve check.
In writingwhat was checked, the result and the reference of any replaced part.
Fill test after the repair
What they doThe technician runs a cycle and checks the dishwasher fills correctly without 4E.
They must show youa complete fill with no code.
In writingthe test, the result and the date.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Supply valve and household water
- Who:
- you, no tools.
- How:
- open a kitchen tap. If water runs, check that the dishwasher supply valve is fully open.
- Result that matters:
- water reaches the dishwasher inlet.
- If no tap gives water:
- it is a supply outage, not a dishwasher fault.
- If the valve was closed and it fills without 4E once opened:
- that was the cause.
- Evidence to keep:
- note what was closed or whether there was an outage.
Evidence: Samsung Latin America dishwasher codes · What do 5C, 5E, 4C, 4E, LC, and LE mean on a dishwasher?
Inlet hose
- Who:
- you, no tools.
- How:
- follow the inlet hose from the valve to the dishwasher. Look for kinks, blockages or ice and check whether it is a FloodSafe type hose with a flood protection device.
- Result that matters:
- a clear hose, no ice and no such device.
- If it was frozen:
- apply a warm towel, as Samsung suggests, and try again.
- If it has a FloodSafe device:
- Samsung says to avoid it; swap it for a standard hose, ideally stainless steel, or have a plumber do it.
- Evidence to keep:
- a photo of the hose and its connection.
Evidence: Samsung Latin America dishwasher codes · Common Samsung dishwasher error codes and their meaning · What do 5C, 5E, 4C, 4E, LC, and LE mean on a dishwasher? · Water supply requirements for your Samsung dishwasher
Water pressure and temperature
- Who:
- plumber.
- How:
- the plumber measures the pressure at the inlet and the temperature of the hot water reaching the dishwasher.
- Result that matters:
- pressure between 20 and 120 psi and hot water between 120 and 149 °F, Samsung requirements.
- If pressure is below 20 psi:
- the installation is corrected; Samsung warns that below 20 psi the valve may fail.
- If both are in range:
- the next step is Samsung service.
- Evidence to keep:
- the measured values in writing.
Measuring pressure needs a gauge and handling the water inlet next to a mains powered appliance: have a plumber do it with the dishwasher unplugged.
Evidence: Water supply requirements for your Samsung dishwasher
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Samsung
- Product type
- Dishwashers
Known code variants
- 4C dishwasher Samsung
- 4C lavavajillas Samsung
- error 4C lavavajillas Samsung
- error 4E lavavajillas Samsung
- Samsung 4C dishwasher code
- Samsung 4E dishwasher code
- Samsung 4E lavavajillas
- Samsung dishwasher 4E
What it means
Samsung defines 4C and 4E on a dishwasher as a water supply error from inadequate pressure or temperature. It asks you to check the supply valve, a possible outage, a frozen or blocked inlet line, the filter, and to avoid FloodSafe type hoses. Its water requirements are 20 to 120 psi (below 20 psi the valve may fail) and hot water at 120 to 149 °F (49 to 65 °C). The code does not name a part: the control board only comes into play if all of the above is fine.
Warnings and stop conditions
- Lowsource verified
Samsung warns that water above 149 °F can cause severe burns: do not raise your household water heater temperature to try to clear the code.
Evidence: Water supply requirements for your Samsung dishwasher
Symptoms and causes
Probable causes · in order
- Closed valve or water outageCommon
Samsung asks you to check the valve and whether supply is cut. Told apart by opening another tap in the house and looking at the dishwasher valve.
Evidence: Samsung Latin America dishwasher codes · Common Samsung dishwasher error codes and their meaning · What do 5C, 5E, 4C, 4E, LC, and LE mean on a dishwasher?
- Frozen or blocked inlet linePossible
Samsung lists a frozen or obstructed inlet line. Frozen only where the install is exposed to cold; Samsung suggests a warm towel to melt the ice.
Evidence: Samsung Latin America dishwasher codes · What do 5C, 5E, 4C, 4E, LC, and LE mean on a dishwasher?
- Pressure or temperature outside requirementsPossible
Samsung asks for 20 to 120 psi and hot water at 120 to 149 °F. Told apart when a plumber measures the inlet pressure.
Evidence: Common Samsung dishwasher error codes and their meaning · Water supply requirements for your Samsung dishwasher
- Hose with a flood protection devicePossible
Samsung Canada asks you to avoid FloodSafe hoses. Told apart by looking at the installed hose: if it has that device, it is a candidate.
Evidence: Common Samsung dishwasher error codes and their meaning
Virtual technician
Does 4E still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Samsung USA dishwasher error codes
Samsung · 2026 · official_doc
- 2
Samsung Latin America dishwasher codes
Samsung · 2025 · official_doc
- 3
Common Samsung dishwasher error codes and their meaning
Samsung · 2026 · official_doc
- 4
What do 5C, 5E, 4C, 4E, LC, and LE mean on a dishwasher?
Samsung · 2026 · official_doc
- 5
Water supply requirements for your Samsung dishwasher
Samsung · 2026 · official_doc
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