Ulcers most commonly occur on the inside of the mouth but may also occur on the tongue and lips, or in association with more generalized conditions, such as cancer. Allergic reactions to food and other substances may cause inflammation, swelling, and development of mouth white patches.
Part 3 Relighting the Pilot Light. 1. Turn the gas valve to the Pilot setting and push down on it. Doing this starts the flow of gas into the tube that supplies the pilot light. If your water heaterâs gas valve does not push down, look for a red control button near the valve. Hold this button down.
1 Dirty pilot tube: Sometimes, your gas water heater wonât light due to a dirty pilot tube. 2  Use a needle to remove any blockages when the pilot tube has cooled. 3  Damaged thermocouple: If none of these techniques work, it is possible your thermocouple is damaged and needs to be replaced or repaired. This will cause the thermocouple to turn off the supply of gas, and then your water heater wonât light. 2  To avoid your water heater going out, bend the thermocouple so it is closer to the pilot light. 3  Dirty pilot tube: Sometimes, your gas water heater wonât light due to a dirty pilot tube.