Samsung Dryer Thermistor DC32-00007A — What It Fixes and How to Replace It
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Understanding the Problem
What it is: The DC32-00007A is the temperature sensor (thermistor) used in many Samsung dryers. It tells the control board the dryer’s internal temperature so the board can cycle the heater correctly. When this sensor fails it can cause no heat, overheating, very long dry times, or temperature-related error codes. Step-by-step diagnostics and repair: 1) Safety first: Unplug the dryer from the wall. If it’s a gas dryer, turn off the gas supply and move the dryer out so you can work safely. Always verify power is removed before testing. 2) Locate the thermistor: On many Samsung models it’s mounted in the blower housing or near the heating element assembly behind the rear panel or lower front panel. Consult your model’s diagram if unsure. 3) Visual inspection: Check the thermistor and connector for burned, melted, or corroded terminals and for damaged wiring. A loose or corroded connector can mimic a bad sensor. 4) Remove the connector: Disconnect the two‑pin connector from the thermistor so you test the sensor alone. 5) Multimeter test (resistance): Set a digital multimeter to the ohms scale. At room temperature (~25°C), the thermistor should typically read about 10 kΩ (this part is an NTC sensor — resistance decreases as temperature increases). If the meter shows open (OL) or a short (very close to 0Ω) the sensor is bad. 6) Dynamic test: Heat the sensor slightly with a hair dryer while watching the resistance. The resistance should drop as it warms (NTC behavior). If it doesn’t change, replace the thermistor. 7) Check related parts: If the thermistor checks OK but you still have heating problems, test the thermal cut‑out/thermal fuse (often part DC47-00016A), heater element, high-limit thermostat, and wiring to the control board. A clogged vent can also make the dryer appear to overheat or change readings. 8) Replace the thermistor: After confirming failure, remove the mounting screw or clip holding the sensor, pull the sensor from its housing, install the new DC32-00007A in the same orientation, plug the connector back in, reassemble panels, restore power, and run a test cycle. How to fix (quick summary): Test with a multimeter disconnected from the harness, confirm NTC behavior (resistance falls when warmed). Replace the DC32-00007A if open, shorted, or not changing with temperature. Also inspect wiring and related thermal fuses/limit thermostats. Safety note: Always unplug the dryer before testing or replacing parts. For gas dryers, shut off the gas supply before moving or working behind the unit. If you are not comfortable working with electrical or gas appliances, hire a qualified technician.
Common Symptoms
Dryer no heat or intermittent heating, dryer overheats or runs too long, temperature-related error codes (sensor/temp fault), or cycles heater on and off irregularly.
Common Causes
- Failed thermistor (open, shorted, or out-of-spec resistance)
- Corroded/loose wiring or connector between thermistor and control board
- Failed thermal fuse / high-limit thermostat or blocked vent causing abnormal temperatures and sensor triggers
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Helpful Repair Tip
With the thermistor unplugged, watch resistance on a meter while blowing warm air (hair dryer) over the sensor: the value should drop smoothly. No change = bad thermistor.
Frequently Asked Questions
Can I test the DC32-00007A without removing it from the dryer?
Yes — you can often test the thermistor in place if its connector is accessible. Unplug power, disconnect the thermistor connector from the wiring harness, and measure resistance across the two terminals. For a dynamic check, blow warm air on the sensor and confirm the resistance drops. Disconnecting the sensor from the harness prevents parallel circuits from affecting the reading.
How long does it take and how much does it cost to replace the thermistor?
Replacement is typically 15–45 minutes depending on model and how panels must be removed. The part usually costs between $10 and $40 retail. If you’re comfortable with basic hand tools and safety procedures, it’s a straightforward DIY fix; otherwise hire a service tech.
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