Only One or Some of the Burners are Lighting

Are the burner ports clogged?

IMPORTANT: Ensure all controls are off and the cooktop is cool before cleaning.  Do not use oven cleaners, bleach, or rust removers. 

1. Remove the burner cap and burner base.
2. Remove the burner base and clean the gas tube opening under the base using a damp cloth.
3. Clean clogged burner ports with a straight pin, needle, or small gauge wire.
4. Reinstall the burner base and cap. Ensure the alignment pins are properly adjusted with the burner cap and the correct burner cap is on the correct burner base. The burner cap should fit flush with the burner base and have very little side-to-side movement. 
5.  Turn on the burner. If it does not light, check the cap alignment and whether the correct burner cap is on the correct burner base. 

Is the burner base and burner cap positioned properly? 

The cap must be seated on the burner base to light and perform properly. Be sure the correct burner cap is on the correct burner base.  The burner base and the underside of the burner cap may have a mark indicating which burner cap and burner base match.  The burner cap should fit flush with the base and have minimal side-to-side movement.  

Always keep the burner cap in place when using a surface burner. A clean burner cap, especially the bottom, will help avoid poor ignition and uneven flames. Always clean the burner cap after a spillover and routinely remove and clean the caps. 

Has the range been recently installed or re-connected to the gas supply?  

Turn on any one of the surface burner knobs to release air from the gas lines. 

Is the main gas valve turned ON?

Verify the main gas valve is ON. If the range was recently installed or re-connected to the gas supply, turn on any one of the surface burner knobs to release any potential air from the gas lines.