Samsung Dryer Error Code 42: What It Means and How to Fix It

Samsung dryer error code 42 typically indicates a communication failure or EEPROM data error between internal control boards, requiring a power reset or component replacement.

What does error code 42 mean on a Samsung dryer?

Samsung dryer error code 42 usually signifies an internal data communication failure or EEPROM fault between the main control board and user interface boards.

Because specific error code meanings can differ significantly by model line, year, or regional power configuration, you should always check your specific owner’s manual. This fault disrupts normal cycle processing, preventing the appliance from executing your chosen drying programs safely.

• Indicates a breakdown in digital data communication between internal control modules.
• May appear due to temporary electrical voltage instability or power surges.
• Specific fault definitions can vary depending on your exact dryer model year.
• Often triggers an automatic halt to protect sensitive internal electronic components.
• Requires verifying power connections and performing a hard system reset first.

What usually causes samsung dryer error code 42?

The most frequent causes include temporary electronic glitches, unstable power supply voltages, loose internal wiring harnesses, or a damaged main control board.

Electronic control modules rely on steady voltage and clean communication signals to operate properly. When loose wire connections disrupt these signals or power fluctuations corrupt memory data, the system triggers this protective error code.

• Temporary software glitches in the main electronic control processor.
• Loose wiring connections or damaged pin terminals within the internal harness.
• Unstable home electrical voltage or improper power outlet grounding.
• Power surges caused by severe electrical storms or faulty circuit breakers.
• Permanent hardware failure of the main printed circuit board assembly.

How can I safely perform a hard power reset?

Unplug the dryer or trip the dedicated circuit breaker to clear residual electrical charge from the internal control board capacitors completely.

Before touching any internal components or power supplies, always disconnect electrical power to prevent severe shock hazards. Leaving the appliance completely unpowered for a short duration allows volatile memory registers to clear successfully.

1. Unplug the dryer power cord from the wall electrical outlet.
2. Locate your home circuit breaker box and switch off the dedicated dryer breaker.
3. Wait for at least sixty full seconds to drain capacitor residual power.
4. Turn the home circuit breaker back to the ON position.
5. Firmly plug the dryer power cord directly back into the wall outlet.

What additional troubleshooting steps should I try next?

Inspect the wiring harnesses connecting the control boards and ensure the unit is connected to a stable, properly grounded electrical power source.

If a simple power reset fails to clear the fault, you must examine the physical integrity of internal wiring. Always unplug the appliance before removing any access panels to inspect internal electronic components safely.

1. Unplug the dryer and remove the rear or top access panel carefully.
2. Locate the main control board and examine all plug-in wire harnesses.
3. Unplug and reconnect any loose or corroded multi-pin wiring connectors.
4. Check that the power cord terminals are tightly secured to the terminal block.
5. Reassemble all access panels securely before restoring electrical power.

Quick reference table for related electrical symptoms

Match your specific dryer symptom to its likely underlying cause and recommended corrective action for faster troubleshooting results.

Different error behaviors help isolate whether the issue stems from incoming household power, user interface buttons, or internal board communication failures.

Symptom	Likely cause / fix
Control panel unresponsive	Stuck button or UI glitch; reset power.
Error appears instantly	Communication board failure; replace board.
Intermittent shutoffs	Loose wiring harness; secure connectors.
Low voltage error	Outlet wiring issue; call electrician.

When should you stop and call a professional technician?

Stop troubleshooting immediately and call a certified technician if wiring is burned, internal components smell like ozone, or board replacement is needed.

Working with high-voltage internal components carries severe electrical shock and fire hazards. If basic resets and wiring checks fail to resolve the underlying fault, professional service is mandatory.

• Visible burn marks or melted plastic on the main control board.
• Persistent burning smell or ozone odor emitting from the console.
• The error code returns immediately after every power reset attempt.
• Testing reveals internal wiring damage requiring professional harness replacement.
• You feel uncomfortable performing any electrical checks inside the appliance.

What information should you prepare before calling for service?

Gather your exact dryer model number, serial number, warranty status documentation, and a detailed list of troubleshooting steps you already tried.

Providing accurate appliance details allows support representatives to diagnose the issue faster and dispatch the correct replacement parts on their initial visit.

• Locate and write down the exact model and serial numbers.
• Check your original purchase receipt to verify active warranty coverage.
• Make a clear written note of every troubleshooting step attempted.
• Take photos of any error display screens or visible wiring faults.
• Note the exact date and circumstances when the error first appeared.

How can you prevent this communication error from returning?

Protect your dryer from power surges by using a heavy-duty surge protector and keeping internal ventilation paths clean and dry.

Preventative maintenance safeguards sensitive electronic control boards against premature component degradation and unexpected electrical interference from household appliances.

• Plug electric dryers into a dedicated, properly grounded wall outlet.
• Install a heavy-duty appliance surge protector to block voltage spikes.
• Keep the laundry area free from excessive humidity and moisture buildup.
• Clean the lint filter before every single drying cycle reliably.
• Schedule annual vent cleanings to prevent overheating and thermal stress.

Frequently Asked Questions

Bottom Line

Start by unplugging your dryer for sixty seconds to perform a complete system power reset. If the error code persists after restoring power, inspect internal wire connections or contact professional support.

Sources

• Samsung Support Center
• Manufacturer User Manual
• Appliance Technician Reference Guide

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