Washer-dryer combo displays E6 and drying function does not heat; clothes remain wet and cold after dry cycle.

Safety first: Unplug the unit and allow it to cool completely before working near the heater or ducts.

• Clean lint and vents: Remove the rear panel or top cover (depending on model) to access the dryer air duct. Vacuum lint from the duct, blower fan, and around the heater housing. Clean the internal lint filter thoroughly.
• Inspect dryer heater: Locate the dryer heating element assembly, usually in a metal housing connected to the air duct. Check for visible breaks in the coil or burnt spots.
• Test heater continuity: Disconnect the heater wires and measure resistance across the heater terminals. An open circuit indicates a failed element that must be replaced.
• Check thermal cutoff and thermostats: On the heater housing, identify the thermal cutoff and high-limit thermostat. Test each for continuity. Any open device (at room temperature) must be replaced with the correct Costway-rated part.
• Verify dryer NTC sensor: Measure resistance of the dryer temperature sensor and compare to specifications. Replace if out of range.
• If all components test good: The main control board may not be supplying power to the dryer heater circuit. Board diagnosis and replacement should be done by a professional.