Gas burner clicks and sparks, but will not light or takes a long time to light.

Safety first: Turn off the burner and allow it to cool. Turn off the gas supply if removing injectors.

Steps:

• Clean burner: Remove the burner cap and head. Clean all ports with warm, soapy water and a soft brush. Use a wooden toothpick to clear stubborn debris.
• Check injector: Inspect the brass injector/nozzle under the burner head for blockage. Clean gently; do not enlarge the orifice.
• Verify cap position: Reassemble the burner, ensuring the cap is centered and seated flat.
• Gas supply: Confirm the gas shutoff valve is fully open and that the appliance is set up for the correct gas type (natural gas vs. LPG) with the proper injectors.

Warning: If multiple burners have weak flames, have a licensed gas technician check the supply pressure and regulator.