Why Your Water Heater Pilot Light Won't Stay Lit: Sacramento Guide

If your water heater pilot light won't stay lit, a failing thermocouple is one of the most common causes. If the pilot lights but goes out after a few seconds, the thermocouple may no longer detect the flame. Other possible causes include a dirty pilot orifice, venting problems, gas supply issues, or a failing gas control valve. For Sacramento homeowners, identifying the underlying issue before attempting a repair can help restore reliable hot water and prevent unnecessary part replacements.

Before Anything Else: If You Smell Gas, Here's What to Do Immediately

If you smell a rotten-egg odor near the water heater, do not relight the pilot or operate switches or appliances. Leave the house and call your gas utility and 911 from outside. Stay out until the property has been cleared.

Gilmore Heating, Air & Plumbing provides emergency plumbing service for urgent plumbing problems.

Five Reasons a Water Heater Pilot Light Goes Out

These five problems are common reasons a pilot light will not stay lit.

1. A Failing Thermocouple

The thermocouple is a safety sensor that detects the pilot flame. When it fails, it can shut off the gas even when the pilot is burning. A pilot that lights and dies within seconds points to the thermocouple as a possible cause. Replacement requires a licensed plumber.

2. A Dirty Pilot Orifice

Dust or debris in the pilot orifice can create a weak flame. A healthy pilot flame is steady and blue. A weak, flickering, or yellow-tipped flame needs attention, but do not open a sealed combustion chamber to inspect or clean it.

3. A Draft or Venting Problem

Air movement can blow out the pilot, while blocked venting can interfere with proper draft. Garage doors, nearby vents, or an obstructed flue can contribute to the problem. Venting problems around a gas appliance require professional inspection.

4. A Gas Supply Issue

Low gas pressure, a partly closed shutoff valve, an empty propane tank, or utility work can affect the pilot. If other gas appliances are having problems too, the issue may be upstream of the water heater. Our gas line services cover gas supply problems that require professional attention.

5. A Failing Gas Control Valve

The gas control valve controls fuel flow to the pilot and burner. A failing valve can cause the pilot to go out and requires professional repair. On an older water heater, a major gas valve failure can also make replacement worth considering.

How to Safely Relight Your Water Heater Pilot Light

Always follow the relighting instructions printed on your water heater. Procedures differ by model.

Turn the gas control to OFF and wait at least five minutes before doing anything else. Then follow the unit's label to select the pilot setting, use the built-in igniter, and hold the control for the specified time.

Many newer water heaters have sealed combustion chambers. Do not open a sealed chamber or insert a match or lighter.

If the pilot will not stay lit after two or three attempts, stop. Repeated attempts release more gas into the chamber and signal a problem that needs professional attention.

When to Call a Sacramento Plumber for Help

Call a plumber if the pilot repeatedly goes out, will not light, burns yellow or orange, or you see soot around the burner. Gas odors and water leaks also require professional attention.

Gilmore Heating, Air & Plumbing provides water heater repair to test the thermocouple, gas pressure, venting, burner, and gas controls.

A failed thermocouple on a newer unit may be a straightforward repair. A major failure on a water heater approaching or past 8-12 years can make replacement worth considering. Financing options are available for larger projects.

Considering a different system? Tankless water heaters use a different ignition system and do not rely on a standing pilot like traditional gas tank models.

Schedule Online (530) 344-4515

What Greater Sacramento Homeowners Should Also Check

California water heaters require seismic strapping. Check that your water heater is secured and mention damaged or missing straps when scheduling service.

Garage-installed water heaters are common throughout the Greater Sacramento Area. Keep gasoline, paint, solvents, and other flammable materials away from the unit, and keep the area clear for combustion air.

Older homes around Carmichael and Fair Oaks may have venting that was modified during previous water heater replacements. Gilmore Heating, Air & Plumbing provides plumbing services throughout the Greater Sacramento Area.