Gas water heaters are reliable and long-lasting, but they can develop issues that affect their performance. Here are some common problems you may encounter when trying to ignite your gas water heater, along with some troubleshooting tips to help you address them:

  1. Pilot light won’t stay lit
    If your pilot light won’t stay lit, it’s likely that the thermocouple has malfunctioned. This device senses when the pilot light is on and prevents gas from flowing if it’s not. You can try cleaning the thermocouple with a fine-grit sandpaper, but if that doesn’t work, you may need to replace it.

  2. Burner won’t ignite
    If the pilot light is on but the burner won’t ignite, there may be a problem with the gas supply. Check that the gas valve is fully open and that the gas line isn’t blocked. If those things are fine, the issue may be with the igniter or the control module, and you may need to call a professional.

  3. Water isn’t hot enough
    If your gas water heater is producing lukewarm water, it may be due to a faulty thermostat. Check that the thermostat is set to the desired temperature and adjust it if necessary. If it still doesn’t produce hot water, you may need to replace the thermostat.


Igniting a gas water heater is a simple process, but it’s important to take the proper safety precautions and follow the correct steps. Remember to turn off the gas supply and check for leaks before attempting to light the pilot light. Once you’ve successfully ignited the heater, be sure to adjust the temperature to your desired setting.

Regular maintenance and check-ups are crucial for ensuring that your gas water heater operates safely and efficiently. By following the steps outlined in this article and addressing any issues promptly, you can enjoy reliable hot water for years to come. For more tips on home appliances and technology, visit Reviews AZ.