Why is my water heater pilot light going out

Your water heater pilot light keeps going out because the flame isn't getting enough gas, the thermocouple isn't sensing the flame, or the gas supply is inconsistent. In Meridian, the most common culprit is a thermocouple that has oxidized or failed after years of service. This article covers the five real causes, how to relight the pilot safely, when to replace the thermocouple, and what a professional repair costs in 2026.

The short answer: why your pilot light keeps going out

A water heater pilot light going out Meridian MS is a symptom, not a diagnosis. The pilot flame needs three things to stay lit: a steady gas supply, a clear path for that gas to reach the burner, and a thermocouple or thermopile that tells the gas valve the flame is present. When any one of those fails, the pilot goes out - sometimes immediately, sometimes after a few minutes or hours.

In our experience across Meridian, about 60% of pilot light failures trace back to a worn thermocouple. Another 25% come from a dirty pilot orifice or clogged burner tube. The remaining 15% involve gas supply issues, draft problems, or a failing gas control valve.

If you're searching for water heater pilot light going out near me Meridian, you're not alone - we handle these calls every week in neighborhoods from Downtown to Northeast Meridian.

The five most common causes in Meridian homes

Meridian's humidity, older housing stock, and occasional gas line pressure swings create a specific set of pilot light problems. Here are the five we see most often.

1. A failed thermocouple

The thermocouple is a small metal rod positioned in the pilot flame. It generates a tiny voltage - about 20 to 30 millivolts - that holds the gas valve open. When it wears out, that voltage drops and the valve closes, snuffing the pilot. Thermocouples typically last 5 to 7 years. If yours is original to a heater installed before 2020, it's a prime suspect.

2. A dirty pilot orifice

Meridian's air carries dust, pollen, and occasional construction debris. That debris can clog the tiny opening where gas exits to feed the pilot flame. A clogged orifice produces a weak, yellow, or flickering flame that can't reliably heat the thermocouple. Cleaning the orifice takes about 15 minutes with the right tools.

3. A clogged burner tube or air intake

If the burner tube is blocked, the pilot flame may light but then extinguish when the main burner tries to ignite. This is common in heaters that haven't had a water heater tune up Meridian MS in several years. Sediment and rust flakes fall onto the burner assembly and restrict airflow.

4. Inconsistent gas supply

If your home has other gas appliances - furnace, stove, dryer - a pressure drop when they cycle on can starve the pilot. We've seen this in older Meridian neighborhoods where the gas meter or supply line is undersized for modern demand. A gas pressure test confirms it in minutes.

5. A bad gas control valve

The gas control valve regulates flow to the pilot and main burner. When its internal diaphragm fails, the pilot may light but won't stay lit. This is the least common cause but the most expensive to fix - a new valve runs $150 to $300 for the part alone.

How to relight your pilot light safely

Relighting a pilot light is straightforward if you follow the manufacturer's sequence. Before you start, smell for gas. If you detect any rotten-egg odor, leave the house and call your gas company immediately - do not attempt to relight.

1. Turn the gas control knob to "Off" and wait 10 minutes for any residual gas to dissipate.
2. Remove the access panel to expose the pilot assembly and burner.
3. Turn the knob to "Pilot" and press it down. Hold it there.
4. While holding the knob, click the igniter button or hold a long lighter to the pilot opening.
5. Once the pilot lights, keep holding the knob for 30 to 60 seconds so the thermocouple heats up.
6. Release the knob. If the pilot stays lit, turn the knob to "On" and replace the panel.

If the pilot goes out as soon as you release the knob, the thermocouple is almost certainly the problem. If it won't light at all, you may have a gas supply issue or a clogged orifice.

Homeowners in Downtown Meridian Water Heater Repair & Replacement often deal with older gas valves that make relighting tricky. If you've tried twice and it won't stay lit, stop and call us.

When it's a thermocouple problem

Thermocouple failure is the single most common reason a water heater pilot light won't stay lit Meridian MS. The telltale sign: the pilot lights fine, but goes out within seconds of releasing the gas knob. That's because the thermocouple isn't generating enough voltage to hold the valve open.

Replacing a thermocouple is a $15 to $40 part, but the job requires shutting off gas, disconnecting the burner assembly, and carefully routing the new thermocouple without kinking it. We do thermocouple replacements daily - most take under an hour. If you're not comfortable working around gas, this is not a DIY job.

For a professional water heater pilot light repair Meridian MS, our team handles the diagnosis, part replacement, and safety check in one visit.

Common mistakes to avoid

We see these mistakes repeatedly when homeowners try to fix a pilot light themselves. Each one can turn a $150 repair into a $600 problem.

• Holding the knob too briefly. The thermocouple needs 30 to 60 seconds to heat up. Release too early and the pilot dies every time.
• Using the wrong replacement thermocouple. Universal thermocouples often don't seat properly. Match the OEM part number.
• Ignoring a yellow flame. A healthy pilot flame is blue with a slight yellow tip. A fully yellow or orange flame means incomplete combustion - a carbon monoxide risk.
• Over-tightening the thermocouple nut. Hand-tight plus a quarter turn is enough. Over-tightening strips the threads and ruins the gas valve.
• Not checking the venting. A blocked flue can cause the pilot to go out repeatedly. We check venting on every pilot light call.

When to call a professional

Call a professional if the pilot won't stay lit after two relight attempts, if you smell gas, if the flame is yellow or orange, or if you see soot around the burner. These are signs of a gas supply or combustion problem that requires diagnostic tools and a licensed technician.

We also recommend calling us if your water heater is over 10 years old. At that age, a pilot light failure often signals the gas valve is next. Replacing a thermocouple on a 12-year-old heater is a band-aid - you may be better off putting that money toward a water heater replacement Meridian MS.

If you're in Northeast Meridian Water Heater Repair & Replacement or anywhere in the Meridian area, our technicians carry common thermocouples and pilot assemblies on every truck. Most pilot light repairs are done in a single visit.

What pilot light repair costs in Meridian in 2026

Typical 2026 pricing for water heater pilot light repair in Meridian ranges from $150 to $350, depending on the cause and parts needed. A straightforward thermocouple replacement runs $150 to $220. If the gas control valve needs replacing, expect $300 to $500 total.

Here's a quick breakdown:

• Thermocouple replacement: $150-$220 (parts + labor)
• Pilot orifice cleaning: $120-$180
• Gas control valve replacement: $300-$500
• Burner tube cleaning: $140-$200
• After-hours or emergency service: add $75-$150

We quote the full price before we start. No diagnostic fee on the first visit for pilot light issues. If you need same day water heater repair Meridian MS, call before 3 PM and we'll typically get to you the same afternoon.

Frequently Asked Questions

Why does my water heater pilot light keep going out in Meridian MS?

The most common cause is a failed thermocouple - it stops sensing the flame and shuts off the gas valve. Other causes include a dirty pilot orifice, low gas pressure, or a clogged burner tube. In Meridian, humidity and older gas lines make thermocouple and orifice issues especially common.

How do I fix a water heater pilot light that won't stay lit in Meridian Mississippi?

First, relight it following the manufacturer's instructions and hold the knob for 60 seconds. If it still goes out, the thermocouple likely needs replacement. That's a job for a licensed technician - we replace thermocouples in under an hour and test the entire gas train before we leave.

Is it dangerous if my water heater pilot light goes out in Meridian MS?

A pilot light going out is not immediately dangerous - the gas valve closes when the flame dies. However, if you smell gas, leave the house and call your gas company. Repeated pilot outages can also indicate a venting problem that produces carbon monoxide, which is dangerous.

How much does water heater pilot light repair cost in Meridian Mississippi?

In 2026, most pilot light repairs in Meridian cost $150 to $350. A thermocouple replacement is $150-$220. If the gas control valve is faulty, expect $300-$500. We provide an upfront quote before any work begins.

Can I relight my water heater pilot light myself in Meridian MS?

Yes, if you follow the manufacturer's instructions and don't smell gas. Turn the knob to "Pilot," hold it down, light the flame, and hold for 60 seconds. If it won't stay lit after two tries, call a professional - repeated attempts can damage the gas valve.

Get help with Water Heater Repair & Replacement in Meridian

If your pilot light keeps going out, we can diagnose and fix it today. Our licensed technicians serve all of Meridian, from water heater repair Meridian MS to full replacements, and we carry the parts needed for most pilot light repairs on every truck.

Call Meridian Water Heater Pros at +16015310808 to schedule your pilot light repair. We'll get your hot water back on - usually the same day.