Smoker powers on but shows E4 and does not heat; fan may still run.

Safety first: Unplug the smoker and verify it is completely cool before accessing the heater area.

Steps to diagnose the heating circuit:

• Remove racks and drip tray to visually inspect the heating element inside the smoker for cracks, breaks, or heavy corrosion.
• From the rear or bottom access panel, locate the heating element terminals and wiring.
• Check for burned or loose spade connectors. Clean and tighten or replace connectors as needed using high-temperature rated terminals.
• Disconnect at least one wire from the element and measure resistance across the element terminals. A typical element will show a finite resistance (often 10–40 Ω). Infinite resistance indicates an open element that must be replaced.
• Inspect for an inline thermal fuse in the heater circuit (often wrapped in fiberglass sleeve). Test for continuity; if open, replace with the exact temperature and rating specified for the GE Profile smoker.
• If the element and thermal fuse test good, the issue may be the heater relay or triac on the control board, which usually requires board replacement.

After replacing any failed parts, reassemble panels, restore power, and test for normal heating.