Samsung Dryer Moisture Sensor & Thermistor Replacement Guide — What This Part Does
Samsung dryers use two separate sensors to control drying. The moisture sensor measures dampness in the load by detecting conductivity between two metal bars in the lint filter housing. The thermistor measures air temperature in the blower housing and sends that data to the control board to regulate heat and cycle behavior.
Moisture sensors fail when fabric softener residue or lint builds up on the sensor bars, breaking contact with damp clothes. Thermistors fail from age and heat stress because they sit in the high-temperature blower housing near the motor. A bad moisture sensor causes cycles to stop too early or run too long. A bad thermistor causes low heat, no heat, long dry times, or irregular heating.
Signs It Needs Replacing
- Clothes still damp at end of cycle The dryer stops before clothes are fully dry, which usually points to a dirty or failed moisture sensor assembly.
- Cycle runs forever The dryer never shuts off automatically because the moisture sensor cannot detect that the load is dry.
- Low heat or no heat The thermistor is reading out of range and the control board cuts or limits heat output to prevent overheating.
- Long dry times The dryer takes much longer than normal to dry a load, which can be caused by a thermistor that reads cooler than actual temperature.
- Error code displayed Samsung displays specific codes for moisture sensor or thermistor faults, depending on which circuit the control board sees as faulty.
- Irregular heating cycles The dryer cycles heat on and off erratically because the thermistor is sending bad temperature feedback to the control board.
How to Replace It
- Unplug the dryer or switch off the circuit breaker before starting any repair work.
- For moisture sensor replacement, remove the lint filter and unscrew the filter housing cover.
- Lift the filter housing out and disconnect the moisture sensor wire harness from the back of the housing.
- Pry out the old sensor bars from their slots in the housing, press the new sensor bars into place, reconnect the harness, and reinstall the filter housing and lint filter.
- For thermistor replacement, remove the top panel and front panel to access the drum and blower housing (exact disassembly varies by model, so consult your service manual).
- Lift the drum out of the cabinet to reach the blower housing on the lower rear of the unit.
- Locate the thermistor on the back of the blower housing closest to the motor and disconnect the two-wire harness connector.
- Remove the single mounting screw holding the thermistor to the blower housing and pull the thermistor out of its mounting hole.
- Insert the new thermistor into the blower housing, secure it with the mounting screw, reconnect the harness, and reassemble the dryer drum, front panel, and top panel.
- Plug the dryer back in, run a test cycle with damp towels, and verify the dryer heats normally and stops at the correct dryness level.
The Part You Need
| Part | Notes |
|---|---|
| Samsung DC32-00007A dryer thermistor | Amazon | Check your model and serial number plate (inside the door or on the back panel) and verify part compatibility with an online parts retailer before ordering. |
| Samsung DC61-02627A moisture sensor bar assembly | Amazon | Includes both sensor bars and wiring. Look up your exact model number from the data plate to confirm the correct sensor kit for your dryer. |
Related Error Codes
If this part is failing you may also see one of these codes:
- Samsung Dryer Ac error code
- Samsung Dryer Ac7 error code
- Samsung Dryer Ae3 error code
- Samsung Dryer Ae4 error code
- Samsung Dryer Ae5 error code
- Samsung Dryer Bc2 error code
- Samsung Dryer Be error code
- Samsung Dryer Be2 error code
- Samsung Dryer C1 error code
- Samsung Dryer C2 error code
When to Call a Pro
If you measure the thermistor at room temperature and get a resistance reading close to 10 kilohms (within 10 percent), the thermistor is good and you likely have a different heating or control board problem that needs professional diagnosis. Also call a pro if disassembly seems over your head or if replacing the sensor or thermistor does not clear the fault code and restore normal operation.