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Reviewed by Marcus AldridgeSenior Editorial Reviewer — Plumbing, HVAC & Wet Trades

Who to call · Plumber

Water heater pilot light out: call a plumber — or fix it yourself

A gas water heater that has lost its pilot light will stop producing hot water. Common causes include a faulty thermocouple, a dirty pilot orifice, or a draft blowing out the flame. While relighting the pilot is sometimes a simple DIY fix, repeated outages indicate a component failure that requires a licensed plumber or gas technician.

Is this your problem?

Symptoms to look for

  1. 01

    No hot water from any faucet in the house

  2. 02

    Pilot light window on the water heater shows no flame

  3. 03

    Water heater status light is blinking an error code

  4. 04

    Slight gas smell near the water heater (turn off gas and call a pro immediately)

  5. 05

    Pilot light relights but goes out again within seconds

Who to call

Plumber

A technician replaces the thermocouple or thermopile (a 30-minute job), cleans the burner and pilot assembly, and checks the flue draft that often blows the pilot out in the first place.

How to fix water heater pilot light out

Water heater pilot light out

easy 10–30 min

Tools: flashlight, long lighter (older heaters without a piezo igniter)

Steps

  1. Read the relighting label on the tank — the sequence differs between models and matters.
  2. Turn the gas control knob to OFF and wait five minutes so any gas clears.
  3. Turn the knob to PILOT, press and hold it down, and press the igniter button (or hold a long lighter to the pilot) until the pilot lights.
  4. Keep holding the knob for 30–60 seconds after it lights, then release; the pilot should stay lit.
  5. Turn the knob to ON and set the temperature; the main burner should light within a minute.

Stop and call a pro if

  • you smell gas at any point — stop, leave, and call the gas emergency line
  • the pilot goes out again within a day — the thermocouple or gas valve is failing
  • the flame is yellow and lazy rather than blue, or there is soot around the burner

Rules in the Netherlands: Relighting a pilot is allowed; any repair to the gas valve or burner must be done by a CO-certified installer.

Rules in Poland: Relighting is fine; burner and gas-valve work requires a technician with gas qualifications.

What a pro does that you can't

A technician replaces the thermocouple or thermopile (a 30-minute job), cleans the burner and pilot assembly, and checks the flue draft that often blows the pilot out in the first place.

DIY cost: $0

FAQ

Frequently asked questions

Who should I call for: Water heater pilot light out?

Call a licensed plumber. Plumbers have the specialized training, tools, and insurance to diagnose water heater pilot light out safely and stand behind the fix. Most offer free quotes and can visit the same day or the next.

Can I fix this myself?

Often, yes: the guide above has 5 steps (easy, 10–30 min, $0). Stop and call a plumber if you smell gas at any point — stop, leave, and call the gas emergency line.

How fast can a pro come out?

Most plumbers offer same-day or next-day visits for non-emergency issues. True emergencies (burst pipes, gas smell, no heat in winter) are typically handled within 1–4 hours.

How much does it cost to fix?

Costs vary by severity and your location. Submit a free quote request to get real pricing from local pros in your area.

What are the signs of: Water heater pilot light out?

No hot water from any faucet in the house. Pilot light window on the water heater shows no flame. Water heater status light is blinking an error code. Slight gas smell near the water heater (turn off gas and call a pro immediately). Pilot light relights but goes out again within seconds.