Samsung DWB70 Dryer Keeps Stopping During Cycle

Introduction

A Samsung DWB70 dryer that stops mid‑cycle can be frustrating, especially when you’re in the middle of a pile of laundry. The issue may stem from a simple clog or a deeper electrical fault, and diagnosing it often requires a systematic approach. This guide walks you through the most common reasons for a stopping dryer, offers step‑by‑step troubleshooting instructions, and shows you how to keep the machine running smoothly.

Common Causes of a Stopping Dryer

Several factors can cause a Samsung DWB70 to halt during operation:

1. Power supply problems
   Inconsistent voltage or a tripped circuit breaker can interrupt the dryer’s cycle.

2. Door latch or switch failure
   The dryer will not run if the door is not securely closed or the latch switch is defective.

3. Heating element or thermostat issues
   A broken heating element or faulty thermostat can trigger safety stops.

4. Lint buildup in the vent or filter
   Blocked airflow creates excess heat, which the dryer’s sensors detect and stop the cycle.

5. Moisture sensor malfunction
   If the sensor misreads moisture levels, the dryer may prematurely stop.

6. Faulty motor or timer
   Wear and tear on the motor or timer can lead to random stoppages.

7. Control board glitches
   Software or hardware faults on the main control board can cause erratic behavior.

Understanding which of these categories applies to your situation is the first step toward a quick fix.

Checking the Power Supply

A stable power source is essential for any appliance. If your dryer is turning off during a cycle, verify the following:

• Verify the outlet
  Use a voltage tester to confirm that the outlet is delivering the correct 120 V. A drop below 110 V can cause the dryer to stop.

• Inspect the circuit breaker
  Make sure the breaker dedicated to the dryer has not tripped. Reset it if necessary, but be cautious if it trips again.

• Check the dryer cord
  Look for frayed or exposed wiring. Replace any damaged sections immediately.

If the power supply is fine, move on to inspecting the door latch and switch.

Inspecting the Door Latch and Switch

The Samsung DWB70 will not operate if the door is not properly latched. A faulty latch can trigger an error code and halt the cycle.

• Test the latch
  Open and close the door several times. Feel for any looseness. A worn latch may need replacement.

• Check the switch
  The latch contains a switch that signals the dryer to start. Using a multimeter, test for continuity across the switch terminals. If continuity is absent, replace the latch assembly.

• Clean the latch area
  Accumulated lint or debris can obstruct the latch. Wipe the area with a damp cloth and dry thoroughly.

If the latch and switch are functioning correctly, the problem likely lies elsewhere.

Examining the Heating Element and Thermostat

A malfunctioning heating element or thermostat can cause overheating protection to activate.

• Locate the heating element
  Open the rear panel of the dryer and identify the metal coil inside the heating chamber.

• Inspect for damage
  Look for visible cracks or breaks. A damaged element must be replaced.

• Test the element’s resistance
  Using a multimeter set to ohms, measure resistance between the element’s terminals. A reading of infinite ohms indicates a broken circuit.

• Check the thermostat
  The thermostat regulates temperature. Test it in the same way; a faulty thermostat can signal a high‑temperature warning.

Replace any defective components, then re‑assemble the dryer and test the cycle again.

Evaluating the Lint Filter and Vent

Blocked airflow is a leading cause of dryer stoppage. Ensure both the internal filter and the external vent are clear.

• Clean the lint filter
  Remove and wash the filter with warm, soapy water. Rinse thoroughly and dry before reinstalling.

• Inspect the vent hose
  Pull the vent hose out of the back of the dryer and through the wall opening. Look for kinks, folds, or obstructions.

• Check the duct
  Use a vent cleaning brush or a long flexible brush to sweep the duct inside the wall or attic. This removes lint that can accumulate over time.

• Examine the vent outlet
  Ensure the vent’s exterior opening is not blocked by insulation or other materials.

Once you have cleared any lint, run a short cycle to see if the dryer continues without stopping.

Testing the Moisture Sensor

The moisture sensor ensures that the dryer stops once clothes are dry. If it misreads moisture levels, the dryer may halt prematurely.

• Locate the sensor
  Inside the dryer’s interior door, there is usually a small rectangular sensor strip.

• Clean the sensor
  Wipe it with a soft cloth dampened with rubbing alcohol. Dust and residues can affect sensor accuracy.

• Re‑install the sensor
  Ensure it sits flush against the interior door frame. If the sensor is damaged, replace it.

After cleaning, start a test cycle. If the dryer stops again, proceed to inspect the motor and timer.

Checking the Motor and Timer

A worn motor or timer can cause irregular cycling or abrupt stops.

• Observe the motor
  While the dryer is running, listen for unusual noises—buzzing, grinding, or squealing. Such sounds can indicate motor wear.

• Test motor windings
  Disconnect the motor’s power supply and use a multimeter to check for continuity across the windings. An open circuit indicates a failed motor.

• Inspect the timer
  The timer is a small, round dial usually located near the control panel. Verify that it is turning smoothly and that the gears are not jammed.

If either component fails the test, replace the motor or timer accordingly.

Inspecting the Control Board

The control board is the brain of the dryer. Software glitches or hardware faults can manifest as sudden stoppages.

• Look for visible damage
  Inspect the board for burn marks, broken solder joints, or damaged capacitors.

• Reset the board
  Turn off the dryer and unplug it for 30 seconds, then plug it back in. This can sometimes clear transient errors.

• Check for error codes
  Samsung dryers display codes on the digital display. Note any code and refer to the service manual for its meaning.

If the board appears damaged or the error code persists after a reset, it may need professional replacement.

How to Reset the Dryer

A simple reset can resolve many temporary faults.

1. Turn off the dryer and unplug it from the wall outlet.
2. Wait for at least one minute.
3. Plug the dryer back in and turn it on.

This process clears internal memory and may restore normal operation if the issue was software‑related.

When to Call Samsung Service

If you have gone through the troubleshooting steps and the dryer still stops during a cycle, it’s time to seek professional help.

• Persistent error codes
  Any recurring code that you cannot decode should be handled by a technician.

• Electrical faults
  Problems with the control board, motor, or heating element that require replacement parts are best managed by a certified service technician.

• Safety concerns
  If you notice any exposed wiring, overheating components, or signs of a short circuit, do not attempt further repairs. Call a professional immediately.

Samsung offers warranty support for eligible units, so keep your purchase receipt and warranty documents handy when calling.

Prevention Tips

Regular maintenance can prevent most stoppage issues.

• Clean the lint filter after every cycle.
• Inspect and clean the vent every three months.
• Check the door latch and sensor at least once a year.
• Run a maintenance cycle with a dryer cleaning sheet or a few towels to ensure airflow.
• Avoid overloading the dryer, which can strain the motor and affect airflow.

Adhering to these habits keeps the dryer running efficiently and reduces the likelihood of sudden stops.

Conclusion

A Samsung DWB70 that stops during a cycle can result from a wide range of issues—from simple lint blockage to complex electrical faults. By methodically checking the power supply, door latch, heating element, vent, moisture sensor, motor, timer, and control board, you can often identify and resolve the problem yourself. When all else fails, contact Samsung service for professional assistance. Consistent maintenance and early intervention will keep your dryer running smoothly and extend its lifespan.