Error E7 on display; freezer may not defrost and frost builds up on the evaporator.

Safety: Unplug the freezer. The defrost heater operates at mains voltage and can be very hot during operation.

Steps:

• Access evaporator and heater: Remove baskets and inner rear panel to expose the evaporator coil. The defrost heater is usually a metal or glass-encased element at the bottom or woven through the coil.
• Visual inspection: Look for breaks in the heater, burn marks, or disconnected wires.
• Test heater continuity: Disconnect heater leads and measure resistance. A typical heater will show low resistance (10–150 Ω). If it reads open (OL), replace the heater.
• Check wiring and connectors: Inspect for burnt spade terminals or brittle insulation. Repair or replace as needed.
• Control board check: If the heater tests good, the defrost relay or triac on the control board may have failed. Inspect the board for burnt spots and replace if necessary.
• Reassemble and test: After replacing parts, reassemble panels, restore power, and monitor for proper defrosting over the next 24–48 hours.