Samsung Dryer Error Code HC4 — Gas Valve or Heating Circuit Error
What this means
Error code HC4 indicates an issue with the dryer's heating system, specifically related to the gas valve coils (on gas dryers) or the heating element circuit (on electric dryers). The control board detects that the heater is not functioning within expected parameters. A clogged vent system is the most common underlying cause, though faulty heating components can also trigger this code.
Alternate codes: 1 HC
Step-by-step fix
4 stepsClean the lint screen and exhaust vent
Remove the lint screen and wash it with warm soapy water. Then disconnect the exhaust vent hose from the back of the dryer and use a vent cleaning brush to remove any lint buildup throughout the entire vent run to the outside.
A clogged vent traps heat inside the dryer and is the most common cause of HC4 errors.
Inspect the heating element or gas valve
Unplug the dryer. For electric dryers, access the heating element housing and test for continuity with a multimeter — it should show some resistance (not OL). For gas dryers, inspect the gas valve coils for damage.
The heating element assembly for Samsung electric dryers is typically part number DC97-14486A.
Test the thermistor
Locate the thermistor (temperature sensor) near the blower housing. Disconnect its wires and test with a multimeter — it should read approximately 10,000 ohms (10K) at room temperature (77°F / 25°C).
If the thermistor reads OL (open) or significantly outside the 10K range, it needs replacement.
Replace faulty components and test
Install a new thermistor (DC32-00007A), heating element (DC97-14486A), or gas valve coils as needed. Reassemble the dryer, plug it in, and run a test cycle.
Always clean the vent system before testing — even new parts will trigger the code if airflow is restricted.
When to call a professional
If the vent is clear and the heating element and thermistor test good, but the HC4 code persists, the main control board may be misreading sensor signals. A technician should diagnose the control board.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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