Samsung Dishwasher 4C Error Code: Meaning and How to Fix It
4C — shown as 4E on older displays — is a water supply error. Your Samsung dishwasher tried to fill with water and the flow was too slow or absent. The most common causes are a closed water tap, a kinked supply hose, or a clogged inlet filter.
The dishwasher measures how quickly water enters at the start of a cycle. If the level does not rise as expected, it stops and displays 4C rather than running a wash with no water. Because the check happens before any washing, this is one of the safest and simplest dishwasher codes to troubleshoot yourself.
Common causes
- The water supply tap under the sink is closed or partly closed
- A kinked or squashed inlet hose behind the dishwasher
- A clogged mesh filter where the supply hose meets the dishwasher
- Low household water pressure
- A faulty water inlet valve
How to fix it, step by step
- Check the water tap. Find the dishwasher's supply tap under the sink and make sure it is fully open.
- Straighten the inlet hose. Slide the dishwasher out slightly if needed and remove any kinks from the supply hose. Confirm it is not trapped under the machine.
- Clean the inlet filter. Turn off the tap, unscrew the supply hose at the dishwasher end, and rinse the small mesh filter inside the connection. Refit everything and turn the tap back on.
- Check for leaks and the Aqua Stop. If your hose has a bulky Aqua Stop box near the tap and it has tripped (often showing red), it must be reset or replaced before water will flow.
- Run a short cycle. Start the quickest program and listen: you should hear water entering within the first minute or two. If 4C returns with good pressure and a clean filter, the inlet valve needs replacing.
After any plumbing work in the kitchen, a 4C code is almost guaranteed if the installer forgot to reopen the dishwasher tap — always check the tap before assuming the machine is faulty.
Frequently asked questions
Are 4C and 4E the same on a Samsung dishwasher?
Yes. 4E is the older display style and 4C the newer one; both mean the dishwasher has a water supply problem.
Why does my dishwasher show 4C but the tap is open?
Move to the next checks: a kinked hose, a clogged inlet mesh filter, or a tripped leak-stop hose are the usual answers.
Can low water pressure cause 4C?
Yes. If several taps were running or your home pressure is very low, the dishwasher may not fill fast enough and will flag 4C.