Error code · Washer-Dryer Combo

Samsung Laundry Combo Water Supply Check, Code 4C

Medium · inspection needed

Code: 4C
Appliance: Washer-Dryer Combo
Brand: Samsung
Warranty: 30-day workmanship

What 4C means

On the Samsung WD90F27 series and the WD90F53AVS Laundry Combo, 4C is an information code that says to check the water supply. Water is not being supplied properly to the drum, so the cycle stops or waits. The owner sees 4C on the display and the unit does not fill. The cause is most often outside the machine, such as a closed faucet or a kinked hose, so those are the first places to look.

Common causes of 4C

Water faucets not fully open
Kinked or crushed inlet hose
Clogged inlet screen or low water pressure
Inlet valve that does not open

✓ One safe check you can try

1. Check that the hot and cold faucets are fully open. 2. Look at the hoses for kinks or crushing behind the machine. 3. Tap Start to resume the cycle. 4. If 4C remains, turn the unit off, wait 2 to 3 minutes, and turn it back on. 5. Test another faucet in the house to see whether water pressure is normal.

! Why to stop there

If the faucets and hoses are fine and 4C remains, we test the inlet valve and its signal
We check the inlet screens for debris and look at water pressure
Our price is written before we start, and the workmanship is under a 30-day warranty

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Washer-Dryer Combo codes

dC2Samsung Laundry Combo Code dC2: Door Pulled While Locked UB1Samsung Laundry Combo Code UB1: Waterproof Items in the Drum DC5Samsung Laundry Combo Code DC5: Auto-open Door Did not Open ULCSamsung Laundry Combo Code ULC: Foam During Dehumidification DC6Samsung Laundry Combo Code DC6: Auto Open Door and SmartThings HCSamsung Laundry Combo Code HC: Heater Error or Hot Compressor LCSamsung Laundry Combo Code LC: Leak Detected NCSamsung Laundry Combo Code NC: Check the Filter

4C4C questions

What should I check first for 4C?

Make sure both faucets are fully open and the hoses are not kinked. Then tap Start to continue the cycle, since a simple supply issue often clears this way.

How long do I wait after turning it off?

Wait 2 to 3 minutes with the power off, then turn it back on. That gives the control time to restart before it checks the water supply again.

What if water pressure is fine and 4C stays?

Then the inlet valve or the screen on the hose may be at issue. We test the valve and its signal, and give a written price before any repair.

Book a visit

Still seeing 4C?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 561-5298