DC64-03788A Control Board – What Part Fixes This Problem and How to Replace It

Understanding the Problem

Brief explanation: DC64-03788A is listed as a Samsung electronic control/PCB part number. Control PCBs coordinate power distribution, user interface, sensors and timed functions in appliances (washers, dryers, refrigerators, microwaves and similar Samsung units). When a control board fails you can see complete loss of function, intermittent behavior, incorrect cycles, or error codes. Because many Samsung board numbers are reused across appliance families, confirm your appliance model and where the board came from (console, rear chassis, ice maker, etc.) before buying. Step-by-step diagnostic and repair instructions: 1) Identify the appliance and board location: note appliance brand and model (from the model tag) and where the board is mounted (control console, top/rear, inside dispenser, etc.). Take photos of the board and connector layout before removing anything. 2) Visual inspection: unplug the appliance. Open the panel to expose the board. Look for burned components, bulging capacitors, char marks, melted connectors, or water/ice intrusion. If you see obvious damage the board is suspect. 3) Check incoming power and fuses: with the appliance plugged in and safe to test, verify that household power is present at the appliance (use a multimeter). Check appliance fuses and thermal fuses. A blown main fuse can mimic a bad board. 4) Read error codes and symptoms: note any displayed error codes or symptom patterns (no display, lockups, dead UI, random resets, no motor/defrost/valve operation). Cross-reference error codes with the appliance manual—some codes indicate sensors or wiring rather than the board itself. 5) Inspect wiring and connectors: wiggle each connector while the unit is powered (carefully) to see if behavior changes. Loose or corroded connector pins often cause intermittent faults that look like board failure. 6) Test outputs (if you can safely): with a meter, check key output voltages from the board when commands are given (e.g., start motor, run heater, pump, fan, valve). If inputs (power, door switch) are correct but outputs never switch, the board is likely defective. 7) Check sensors and actuators first: a bad sensor (door switch, thermistor, water level sensor) can create symptoms that look like a control board fault. Measure sensor resistances against specification before condemning the PCB. 8) Swap or substitute (if possible): if you have access to a known-good board (or a working identical appliance), swapping the board is the definitive test. If behavior is fixed after swap, the board was bad. 9) Replace the board safely: a. Unplug the appliance and turn off water/gas if relevant. b. Photograph and label every connector (masking tape + marker) so you can restore original wiring. c. Remove mounting screws and carefully lift the board out. Avoid touching components; ground yourself to prevent static damage. d. Transfer any components (mounting brackets, display lenses) to the new board if needed. e. Install the replacement DC64-03788A board, reconnect connectors exactly, secure mounting screws, and restore power. f. Run diagnostic/test cycles and verify operation (controls, motor operation, defrost, valves, UI). 10) If replacement doesn't fix it: re-check wiring, ground, and supply voltages. Some failures are caused by a failing power supply module before the PCB or by shorted loads (motors, heaters) that damaged the board. Safety note: Always unplug the appliance before disassembling. When measuring live circuits use appropriate PPE and caution. If you are not comfortable working with mains voltage, hire a qualified technician.

Common Symptoms

Appliance is completely dead or unresponsive; control lights or display won’t come on; intermittent operation or random cycle changes; error codes pointing to control faults; burnt smell or visible damage on the board.

Common Causes

• Power surge or lightning strike damaging electronic components
• Moisture, ice, or corrosion reaching the PCB (common around water/ice compartments)
• Shorted external components (heaters, motors, valves) feeding back and destroying board outputs

Popular Parts That Fix This Problem

These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.

Frequently Asked Questions