Washer-dryer combo shows E11 and stops heating during wash; water remains cold even on hot cycles.

Safety first: Unplug the appliance and allow any hot water to cool before working near the tub heater.

• Confirm settings: Ensure a hot or warm wash program is selected and that "eco" or cold-only options are not enabled.
• Access heater: On many NewAir combos, the wash heater is mounted in the lower rear of the tub. Remove the rear panel to locate the heater terminals and NTC sensor.
• Check wiring: Inspect the heater and sensor connectors for looseness or burns. Re-seat connectors firmly.
• Continuity test (advanced): With a multimeter and power disconnected, test the heater element and NTC sensor for proper resistance. Replace any open or out-of-spec components.
• Replace heater assembly: If the heater is faulty, remove the retaining nut, gently pry the heater from the tub, and install a compatible NewAir tub heater with new gasket. Ensure a watertight seal.
• If heater and NTC are good: The control board heater relay may be defective and will require professional diagnosis and possible PCB replacement.