RepairUpdated July 7, 2026
A water heater pilot light that won't stay lit is one of the most common issues we see in Bartlett homes. When your pilot goes out, you're left without reliable hot water for showers, laundry, and dishes. In our climate, this quickly turns into more than just an inconvenience, especially on cold winter mornings.
Why Pilot Lights Fail in Bartlett Homes
Homes across Bartlett range in age and design, but gas water heaters are still found in many single-family properties, townhouses, and older condos. Most rely on a standing pilot design. In our region, cold snaps and changing humidity can impact draft, while moderate water hardness can cause mineral buildup at the burner area. These factors, combined with regular use, often lead to pilot issues.
Common reasons for a pilot light going out include:
- Faulty thermocouple or flame sensor failing to sense the flame
- Pilot orifice or burner clogged by dust or mineral buildup
- Improper gas pressure or a malfunctioning gas control valve
- Drafts or a backdraft through the flue, especially with our freeze-thaw cycles
- Water leaks near the burner area affecting combustion
Basic Steps to Relight a Water Heater Pilot
Homeowners with a standard tank-style gas water heater can usually check and relight the pilot safely if they follow proper steps. If you have any uncertainty or smell gas, call a pro right away. For typical relighting, we recommend:
- Turn the gas control knob to "off" and wait at least 5 minutes for any gas to clear.
- Set the knob to "pilot" position. Hold down the control while pressing the ignition button (if equipped) or lighting with a long lighter.
- Continue holding the button for 30-60 seconds to allow the thermocouple to heat.
- When you release the control, the pilot should stay lit. If it doesn't, repeat once. If it fails again, the thermocouple or gas valve may be the issue.
Modern water heaters may use electronic ignition or sealed combustion, which require different troubleshooting. Refer to the manufacturer's label on your heater, usually found near the control panel.
When Relighting Isn't Enough
If the pilot light refuses to stay on, that usually means a component needs repair. In Bartlett, we often find thermocouples or flame sensors have worn out. Hard water can lead to debris on the pilot orifice, which blocks gas flow. Tight crawlspaces or utility closets also trap dust and pet hair, which can clog air intakes. Our team checks all these spots when handling water heater service calls.
Sometimes, the root cause is outside the tank. A sudden change in draft due to vent blockage, roof ice dams, or birds nesting in the flue affects many homes in Cook County. Building age plays a role as well; older homes with original gas valves or lines may need a closer look. If there are signs of a leaking tank or wetness near the burner, both leak detection and tank evaluation are essential.
Warning Signs You Need a Professional
- You smell gas after attempting to relight or near the unit
- The pilot goes out repeatedly after successful relighting
- You see rust, water staining, or debris near the burner area
- The control knob or gas valve feels loose or won't turn
- You hear a whistling or hissing noise from the heater
Homes built during Bartlett's growth period in the 1980s and 1990s often have original water heaters reaching the end of their service life. If your unit is over 10-12 years old, parts can fail more frequently, and replacement may start to make sense.
Long-Term Solutions for Reliable Hot Water
Repeated pilot problems can point to larger issues with your water heater or gas line. If your home has hard water, sediment can accumulate at the tank base and around the burner, leading to poor combustion. Regular flushing and inspection can prevent this. We help homeowners weigh repair costs against replacement options. In some cases, updating an old, inefficient tank brings better reliability and lower gas bills.
If mineral buildup is a recurring problem, we might suggest water softening options in combination with ongoing pipe repair, especially if you have older galvanized lines. Our Bartlett crew also checks for venting and draft issues, which sometimes tie back to home insulation projects or roof changes. If you've experienced basement moisture or flooding after heavy rain, common on local clay soil, proper sump pump service can protect both your water heater and overall plumbing system.
If you ever have doubts about what's wrong, we're ready to help. Call us at 630-749-9809. We troubleshoot pilot light problems, repair faulty components, and offer honest advice about your options for repair or new installation. Our full-service plumbers are local and experienced, and we stand behind our work for Bartlett homeowners.