Kenmore KWD25 Dryer Stuck in Auto Mode Forever

Kenmore KWD25 Dryers are designed to make laundry day easier, but when the unit gets stuck in “Auto” mode it can quickly turn a routine chore into a frustrating problem. Below is a comprehensive guide that explains why the dryer might stay on Auto, how to diagnose the issue, and what steps to take to bring it back to normal operation.

Understanding Auto Mode

Auto mode is a feature that uses built‑in sensors to decide how long to run a cycle. The dryer measures temperature, moisture, and sometimes the weight of the load to determine the optimal drying time. It automatically switches to a heat‑dry cycle when needed, then stops when the clothes are dry or the sensors report the load is complete. Because the cycle ends on its own, the user has little manual control over the duration.

When the dryer stays in Auto mode forever, the sensors or the control board are not signaling the correct state, and the machine continues to run without stopping. This can waste energy, overheat the dryer, or damage the motor and drum.

Common Symptoms

• The dryer keeps running even after the cycle should have ended.
• The “Auto” icon remains lit on the control panel.
• The drum continues to turn, but the heating element stays on.
• No error codes appear on the display.
• The machine may make unusual noises, indicating a mechanical jam.

If you see any of these signs, it’s time to investigate the cause.

Safety Precautions

Before touching any internal components:

1. Unplug the dryer from the electrical outlet.
2. If you have a gas dryer, shut off the gas supply.
3. Wait at least 30 seconds after unplugging for the heating element to cool.
4. Keep a fire extinguisher nearby in case of sparks or overheating.

These steps protect you and prevent accidental damage to the dryer.

Basic Troubleshooting Steps

The first phase of troubleshooting focuses on the most common, easy‑to‑fix problems. Following these steps can resolve many cases of a stuck Auto mode.

1. Check the Control Panel

• Press the Auto button again to toggle the cycle.
• Inspect for any stuck or jammed buttons.
• Look for any visible damage to the display or control board.

2. Reset the Dryer

• Hold the Start/Reset button for 5–10 seconds until the display clears.
• Wait a few minutes and try running a new cycle.

3. Inspect the Power Cord

• Make sure the cord is fully inserted into the outlet.
• Look for frayed wires or visible damage.
• If you find a damaged cord, replace it before attempting further repairs.

4. Check the Door Switch

• The dryer will not finish if the door switch is stuck.
• Open and close the door several times to ensure the latch engages fully.
• Gently wiggle the switch to confirm it moves freely.

5. Examine the Vent and Lint Filter

• A clogged vent can cause the dryer to overheat and stall.
• Remove and clean the lint filter.
• Inspect the vent hose for kinks or blockages.

Completing these steps often restores normal Auto mode operation. If the problem persists, more detailed diagnostics are required.

Common Causes and Their Fixes

When basic troubleshooting fails, deeper issues may be at play. Below are the most frequent culprits and how to address them.

Faulty Latch Switch

The latch switch detects whether the dryer door is closed. If it fails to register the door as closed, the control board may keep the dryer in Auto mode to prevent a short cycle.

Fix:

1. Open the dryer’s back panel to access the latch switch.
2. Disconnect the wiring harness and remove the switch.
3. Test the switch with a multimeter for continuity.
4. Replace the switch if it fails the test.

Malfunctioning Temperature Sensor

Kenmore KWD25 dryers use a thermistor to monitor drum temperature. A faulty sensor can misread temperature, causing the control board to think the load still needs drying.

Fix:

1. Locate the temperature sensor near the heating element.
2. Disconnect and test it for resistance changes across a known temperature range.
3. Replace the sensor if it shows no change.

Jammed Drum or Belt

A jammed drum stops the dryer’s motor from engaging the cycle correctly. The motor may keep running, but the drum will not turn, leaving the dryer in Auto mode.

Fix:

1. Remove the lint filter and any visible debris from the drum.
2. Verify that the drum rotates freely by turning it manually.
3. Check the drive belt for cracks or breaks and replace if necessary.

Control Board Issues

The electronic control board interprets sensor data and dictates the dryer’s behavior. A board with a software glitch or hardware fault will mismanage the Auto mode cycle.

Fix:

1. Power down and unplug the dryer.
2. Remove the control panel and inspect the board for burned or damaged components.
3. Use a multimeter to check for proper voltage at the board’s power inputs.
4. If the board appears damaged, replace it with a compatible part.

User Error (Cycle Selection)

Sometimes, the issue is simply that the wrong cycle was selected, or the user accidentally triggered a special mode that doesn’t behave like standard Auto.

Fix:

1. Review the cycle selection on the control panel.
2. Reset to the basic Auto cycle and ensure no other modes are active.
3. Run a trial cycle to confirm normal behavior.

Advanced Diagnostics Using a Multimeter

If you’re comfortable working with electronics, a multimeter can help pinpoint the exact failure point.

Checking the Power Supply

1. Measure 120V across the dryer's power terminals.
2. Verify the voltage remains steady during a cycle.

Testing the Thermistor

1. Set the multimeter to the resistance range.
2. Record the thermistor’s resistance at room temperature.
3. Heat the thermistor with a heat source (e.g., a hairdryer) and check for a resistance drop.
4. Compare the readings to the manufacturer’s specifications.

Evaluating the Latch Switch

1. With the dryer off, check for continuity between the switch’s pins.
2. When the door is closed, confirm the circuit closes.
3. If the switch fails any of these checks, replace it.

When to Call a Professional

Even with thorough troubleshooting, some problems are best handled by a qualified technician:

• Persistent electrical issues that require component replacement or PCB repair.
• Gas line or vent problems that pose safety hazards.
• Complex mechanical failures such as motor or drum bearing replacement.
• Warranty concerns—if the dryer is still under warranty, a professional service call may be covered.

Preventive Maintenance Tips

Keeping your dryer in good shape prevents many of the issues that lead to a stuck Auto mode.

Regular Lint Filter Cleaning

Remove the lint filter after every load and wipe it clean to avoid lint buildup.

Vent Hose Inspection

Inspect the vent hose every three months. A blocked vent reduces airflow and can cause overheating.

Door Seal Check

Ensure the door seal (gasket) remains intact and free of tears. A damaged seal can trigger safety stops and affect cycle timing.

Firmware Updates

If your dryer model supports firmware updates, keep it up to date. Manufacturers often release updates that fix bugs related to cycle control.

Final Thoughts

A Kenmore KWD25 dryer that remains in Auto mode can be a symptom of a range of electrical, mechanical, or user‑related problems. By starting with basic safety checks and progressing through targeted troubleshooting steps, many owners can restore normal operation without professional help. If the issue proves stubborn, don’t hesitate to contact a licensed appliance technician, especially when dealing with electrical or gas components.

Regular maintenance, prompt lint filter cleaning, and vent inspection can help prevent Auto mode glitches from occurring in the first place. With these practices, you’ll enjoy reliable, efficient drying performance for years to come.