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Gas grill flare-ups under the food

Flare-ups are grease on hot metal — clean tents, scrape the firebox, empty the tray. Replace lace heat plates before you blame the burner.

easy PT50M Updated 2026-09-04

Top-down gas firebox layers Cooking grates on top, inverted-V flavorizer bars over the burner tubes, electrode at the left tube. TOP DOWN · GAS FIREBOX 1 cooking grates 2 flavorizer bars 3 burner tubes + ports 4 electrode (left tube) LAYERS (top → bottom) 1 Grates — food sits here 2 Flavorizer / heat tents 3 Burner tubes + ports 4 Electrode at left port Lift grates, then tents, to reach tubes. Gas off.
Fig. — Firebox, top down: grates, flavorizer bars, burner tubes, electrode.
Grease drip path from grate to cup Fat hits flavorizer bars, sheds to the firebox floor, runs the rear rail, drops into the cup. SIDE · DRIP PATH 1 grates 2 flavorizers shed fat 3 firebox floor 4 rear rail 5 cup A packed cup backs grease into the burners and the tank cabinet. Empty the cup, scrape the rail, reseat so the drop lands in the pan — not the island.
Fig. — Drip path: grates → flavorizers → floor → rail → cup.

Flare-ups are fuel (grease) meeting oxygen on a hot surface. Fat drips through gaps in worn Flavorizers/tents, hits the tube or firebox, and flashes. This is different from a grease fire after the cook in the tray.

Procedure

  1. Lid open. Note whether flames lick through a hole in a tent or only when fatty food is over a gap.
  2. Cool down. Grates off. Inspect tents/bars for lace and missing peaks.
  3. Replace tents that show daylight — when to replace heat plates.
  4. Scrape the firebox floor and the grease tray.
  5. Re-seat tents so no port row is naked from the front.
  6. Trim excess fat on the next cook; keep a safe zone.
  7. Persistent one-zone flare: that tent or the tube under it — measure burner tube if ordering.
  8. Model-specific tents: use the finder or brand hubs.

FAQ

Do I need a new grill?

Not for flare-ups alone. Rusted-through firebox is a different call — repair vs replace rusted firebox.

Wire brush the tents?

Prefer a scraper. Wire bristles: bristle-free vs wire.