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Error code reference

Samsung Dryer Error Code HC

Invalid Heating Temperature (Over Heating)

Samsung codesSamsung dryer codes

Invalid Heating Temperature (Over Heating) – heater relay stuck, thermistor out of spec, or motor switch stuck.

First step from the service manual

Check Main PBA heater relay, thermistor spec, and motor switch.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What HC means on a Samsung dryer

The HC error code on a Samsung dryer indicates an invalid heating temperature condition, specifically an overheating event detected by the control system. When the dryer's internal temperature rises beyond acceptable limits, the Main PBA (Printed Board Assembly) triggers this fault to protect the drum, motor, and surrounding components from heat damage. The code is not simply a high-heat reading but a signal that the heating circuit is behaving outside of designed parameters, either by generating heat when it should not or by failing to accurately report temperature.

Three primary causes drive the HC fault. First, a stuck heater relay on the Main PBA can cause the heating element to remain energized continuously, even during cool-down cycles or after the thermostat signals the heat to stop. Second, a thermistor that has drifted out of specification will send incorrect resistance readings to the control board, causing the board to either misread actual temperature or fail to regulate the heating cycle correctly. Third, a stuck motor switch can interfere with the circuit logic that governs heating operation, triggering an apparent overheat condition.

Diagnosing HC requires checking all three components systematically. Begin with the Main PBA heater relay, inspecting for signs of contact welding or failure to open. Then test the thermistor resistance against the specified values for the unit and compare the readings at ambient temperature. Finally, inspect the motor switch for mechanical binding or electrical faults that would cause it to remain in the wrong position. Skipping any of these steps risks misdiagnosis and repeat failures.

Source: manufacturer service documentation.

Common causes of HC

  1. 01

    Stuck Heater Relay on Main PBA

    Part replacement

    The heater relay on the Main PBA can weld its contacts closed, causing the heating element to stay on continuously without shutting off between cycles. This is the most direct cause of true overheating and should be inspected first.

  2. 02

    Thermistor Out of Specification

    Part replacement

    A thermistor that has drifted from its specified resistance range will send inaccurate temperature data to the control board, causing the board to misinterpret the drum temperature and trigger the HC fault. Testing thermistor resistance at ambient temperature and comparing to the rated spec will confirm this fault.

  3. 03

    Stuck Motor Switch

    Part replacement

    The motor switch interacts with the heating circuit logic, and if it remains stuck in one position it can disrupt normal heat regulation and cause the control board to register an overheat condition. Inspect the switch for mechanical binding and test it for correct electrical operation.

  4. 04

    Restricted Airflow or Blocked Exhaust Vent

    Wiring / connection

    While not a direct component failure, a heavily clogged lint filter or blocked exhaust duct can cause heat to build up inside the dryer drum beyond safe limits, contributing to or triggering the HC fault. Check and clear the vent path before replacing any parts.

See the test procedure for each cause

Frequently asked questions about HC

What does HC mean on a Samsung dryer?
HC stands for an invalid heating temperature condition, typically caused by overheating inside the dryer drum. Samsung's control board triggers this code when it detects that heat is exceeding safe operating limits or that the heating circuit is behaving abnormally. The most common culprits are a stuck heater relay on the Main PBA, a thermistor out of specification, or a stuck motor switch. This is a protective fault designed to prevent damage to internal components or a potential fire hazard.
Can I fix the HC error code myself on a Samsung dryer?
Some steps, like clearing a blocked exhaust vent or cleaning a clogged lint filter, can be done without professional help. However, testing and replacing the heater relay on the Main PBA, measuring thermistor resistance, or inspecting the motor switch requires basic electrical testing tools such as a multimeter and comfort working with appliance wiring. If you are not confident working with internal electrical components, it is safer to call a qualified appliance technician.
Is it safe to keep using my Samsung dryer when the HC code is displayed?
No, you should not continue operating the dryer while the HC code is active. This fault indicates a potential overheating condition, which carries a risk of damage to internal components and, in serious cases, a fire hazard. Stop using the dryer until the root cause has been diagnosed and corrected.
Will resetting the dryer clear the HC error code?
Resetting the dryer by unplugging it for a few minutes may temporarily clear the HC code, but the fault will return if the underlying cause is not addressed. A stuck relay, out-of-spec thermistor, or stuck motor switch will continue to trigger the code on subsequent cycles. A reset is useful for confirming whether the fault is intermittent, but it is not a repair.
How much does it cost to repair an HC error code on a Samsung dryer?
Repair costs depend on which component has failed. Replacing a thermistor is generally the least expensive fix, with parts typically in the range of $15 to $40 and modest labor costs if a technician is involved. A Main PBA replacement is the most costly scenario, with parts ranging from $100 to $250 or more depending on the model, plus labor. Getting a proper diagnosis before ordering parts helps avoid unnecessary expenses.

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