my griddle has a huge hot spot in the middle and the front edge stays way cooler, is this normal

Diagnosis

This is a common thermal distribution issue inherent to the design of the Blackstone 36-inch Griddle Cooking Station. The cooking surface is a single, heavy-duty cold-rolled steel plate heated from below by four independent H-style burners. Because the burners are positioned centrally under the plate, the heat concentrates in the middle where the thermal energy from the two interior burners overlaps. This creates a "peak" temperature zone in the center of the griddle. The cooler front edge occurs because the burner tubes are offset toward the rear and center of the unit. Heat travels through the steel via conduction, but since the front edge is the furthest point from the direct flame and is constantly exposed to ambient air (which acts as a heat sink), it loses temperature faster than it can be replenished. You can confirm this by using an infrared thermometer; you will typically see a 50-100 degree Fahrenheit difference between the center-rear and the front-most edge of the plate.

How to Fix It

To normalize your cooking surface and manage these temperature variances, follow this systematic calibration and seasoning process:

1. Perform a "Burner Level Check." Ensure the griddle is sitting on a completely level surface. If the unit is tilted forward, the heat will migrate toward the back, exacerbating the cold front edge. Use a bubble level across the cooking surface and adjust the feet until perfectly flat.
2. Conduct a Flame Quality Audit. Turn all four burners to the "High" position. Look through the burner ports to ensure you have a steady, blue flame. If you see yellow tipping or "lifting" flames, your burners are clogged with debris or grease, preventing the heat from reaching the plate evenly.
3. Implement Zonal Heat Management. Instead of setting all burners to the same level, create a heat gradient. Set the two center burners to "Medium" and the two outer burners to "Medium-High." This reduces the center hot spot while pushing more energy toward the periphery.
4. Execute a High-Heat Seasoning Cycle. Apply a thin layer of Blackstone Seasoning or flaxseed oil. Crank all burners to high for 30 minutes. This creates a carbonized layer of polymerized oil that helps conduct heat more efficiently across the steel surface, slightly smoothing out the temperature gaps.
5. Use the "Slide and Sear" technique. When cooking, sear your proteins in the center "hot zone" for 60 seconds, then slide them toward the front edge to finish cooking at a lower temperature.

If That Didn't Work

• Check for Air Blockages in the Venturi Tubes. If the front edge is excessively cold, one of the burners may be under-firing. Remove the control knobs and check the air shutter (the sliding metal piece at the end of the burner tube). If it is too closed, the fuel-to-air ratio is off, leading to a weak flame that cannot penetrate the steel plate.
• Inspect the Burner-to-Plate Gap. Over time, the mounting brackets can shift. If there is a gap of more than 1/4 inch between the burner tube and the underside of the griddle plate, the heat will dissipate into the air rather than the steel. You may need to tighten the mounting bolts to bring the burner closer to the plate.
• Switch to a High-Pressure Regulator. If you are using a standard low-pressure regulator and a large 20lb tank, you may experience "pressure drop" when all four burners are on, leaving the outer edges starved for fuel. Upgrading to a high-flow regulator ensures every burner gets maximum BTU output.
• Verify Plate Thickness. If you have added a third-party accessory or a heavy-duty heat diffuser underneath, you may be insulating the plate too much, which prevents the heat from migrating from the center to the edges. Remove any non-factory modifications to restore original heat flow.

Heads Up

• Avoid using "High" heat for extended periods when the griddle is empty; this can cause the center of the plate to warp or "bow," which creates permanent cold spots where the plate no longer touches the burner heat.
• Always clean your grease trap every 2-3 uses. A clogged grease trap can cause heat to reflect unevenly off the bottom of the chassis, affecting the thermal profile of the plate.
• When seasoning, never apply more than a paper-towel-thin layer of oil. Excessive oil will pool in the center hot spot and create a sticky, gummy residue that interferes with heat conduction.
• Keep the burner ports clear of food debris using a stiff wire brush to ensure a consistent flame pattern across the entire length of the burner tube.