Error code · Washer-Dryer Combo

Samsung Laundry Combo Code 4C2: Hot and Cold Hoses

Low risk · DIY check OK

Code: 4C2
Appliance: Washer-Dryer Combo
Brand: Samsung
Warranty: 30-day workmanship

What 4C2 means

This code appears on the Samsung WD90F27 series and WD90F53AVS Laundry Combo. The control reports that the hot and cold water hoses look connected the wrong way round, because the water reaching the drum is too hot for the fabrics in the load. Some fabrics need protection from that heat. You will see 4C2 on the display and the cycle will not carry on until the water source is corrected.

Common causes of 4C2

Hot and cold hoses swapped at the wall valves
Hose connected to the wrong inlet on the back of the unit
Water heater output reaching the cold line through a shared valve

✓ One safe check you can try

1. Pause the cycle and look at the two supply hoses behind the unit. 2. Confirm the hot hose runs from the hot valve to the hot inlet and the cold hose from the cold valve to the cold inlet. 3. Fix any swapped connection by hand, with the valves closed first. 4. Open the valves, close the door and tap Start. 5. If 4C2 returns, turn the unit off and on once.

! Why to stop there

We cannot tell from the display alone whether the hoses are right or the inlet valve is sensing wrongly.
We check each supply line for temperature, then the inlet valve and its screen.
Our repair would carry a 30-day workmanship warranty, and you approve the written price first.

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.

→Same appliance

Other Washer-Dryer Combo codes

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 NC2 / NC3Samsung Laundry Combo NC2 / NC3: Cover or Kit Missing OCSamsung Laundry Combo Code OC: Overflow, Water Level not Controlled SDCSamsung Laundry Combo Code SDC: Drawer Door Lock SFSamsung Laundry Combo Code SF: System Error on the Controller SUDSamsung Laundry Combo Code SUD: Foam Detected, Then End

4C24C2 questions

Is 4C2 a sign the Laundry Combo is broken?

Usually not. It points to the water supply, most often swapped hot and cold hoses. Correct the hoses first. If the code stays after that, we check the inlet valves and the sensing circuit.

Which hose goes where?

The hot supply connects to the hot inlet and the cold supply to the cold inlet. The valves and inlets are normally marked, so compare each one before you tighten anything.

Can I keep washing while 4C2 shows?

The cycle will not continue properly with the code showing. Fix the hose connections, tap Start, and only run a full load once the code has cleared.

Book a visit

Still unsure about 4C2?

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

(713) 561-5298