Pot may be over hanging cooktop. Ensure pot or pan is centrally located on burner and that pot size is not too large so that it overhangs burner.Pot is too large. Use a smaller pot.
Use of polyunsaturated oil. Use olive oil. Wrap meats in foil or use an oven roasting bag.
Incorrect injector fitted. Refer to the installer to have problem rectified.Gas pressure to appliance too high. Refer to the installer to have problem rectified.
