If it wont stay lit, try tapping the gas valve with the handle if a screw driver. Failing that, replace the thermocouple or thermopile, whichever your appliance has. If it won't light at all, ensure your gas is on, or, of it has a piezo igniter, verify that it is sparking.
Last edited by hvac benny; 02-04-2012 at 12:23 PM.
Exactally what are we talking about here ? I'm assuming a hot water heater ? If so there should be TWO buttons that you will press. 1 will be the gas value adjustment knob will need to be in the pilot position and you will need to press that button down to open gas valve. While holding that button in the DOWN position press the ignite/spark button . Once you see the flame continue holding down gas adjustment knob for30-90sec. Did it help?