Control panel displays ERR1 and grill will not start the ignition sequence

Safety first: Unplug the grill from power and allow all components to cool completely before opening any panels. Do not work on a hot grill.

• 1. Power reset: Unplug the grill for 5 minutes, then plug back in and try to start again. Sometimes the control board will clear a transient ERR1.
• 2. Inspect the hot rod igniter:
  • Remove the cooking grates, drip pan, and heat diffuser to expose the fire pot.
  • Look into the fire pot for the igniter tip. It should protrude slightly into the pot and not be broken or burned away.
  • If the igniter is cracked, missing, or heavily burned, it likely needs replacement.
• 3. Check igniter wiring:
  • Access the wiring under the hopper/control area (remove side or bottom access panel as per Masterbuilt manual).
  • Locate the two-wire harness from the igniter to the control board.
  • Ensure connectors are fully seated and not corroded or melted.
  • Look for pinched or burned wires near the fire pot.
• 4. Test igniter resistance (if you have a multimeter):
  • Disconnect the igniter plug from the control board.
  • Measure resistance across the igniter leads; most Masterbuilt hot rods read roughly 40–80 Ω. An open circuit (OL) or 0 Ω indicates a bad igniter.
• 5. Replace parts as needed:
  • If resistance is out of range or the igniter is visibly damaged, replace the hot rod igniter with a Masterbuilt-compatible part.
  • If a known-good igniter still triggers ERR1, the control board or its internal igniter fuse may be faulty and should be replaced as an assembly.