Safety: Disconnect power and let the grill cool before servicing.

ER-2 usually indicates the RTD sensor is shorted or reading out of range.

Visual inspection: Locate the RTD probe in the cook chamber and follow its cable. Look for melted insulation, bare wires touching the stainless body, or areas where the cable is crushed by panels or grates.
Check connector for moisture: At the controller, unplug the RTD connector. Inspect for water, grease, or corrosion. Dry thoroughly, clean with electrical contact cleaner, and reconnect.
Measure resistance: With the RTD disconnected and grill unplugged, measure resistance across the RTD leads. A very low resistance (near 0 ohms) indicates a shorted probe. Replace the probe if shorted.
Isolate wiring: If the probe itself measures normal, flex the cable while watching the meter. If resistance jumps to near zero when bent, the cable is shorting internally. Replace the RTD assembly.
Re-route cable: Ensure the new or existing RTD cable is routed away from sharp edges and hot surfaces. Use high-temp zip ties or clips to secure it.
Retest: Restore power and verify that ER-2 is cleared and the temperature reading is stable.

Controller displays ER-2 and temperature reading is erratic or grill shuts down

Possible Causes