None Water Heater: not staying lit

Possible Causes

Faulty thermocouple or thermopile

How to Identify: Pilot light lights but goes out when control knob is released; flame not detected by sensor

Part: Thermocouple/thermopile

Clogged or restricted pilot orifice/pilot tube

How to Identify: Weak or small pilot flame; soot or debris visible at pilot opening

Part: Pilot orifice/pilot tube

Gas supply issues (valve not fully open, low gas pressure)

How to Identify: No continuous gas flow to pilot; other gas appliances show low output

Part: Gas supply/valve

Moisture/wet pilot assembly or ignition components

How to Identify: After rain or humidity, pilot hard to light or stay lit; visible moisture near ignition

Part: Pilot assembly/ignitor

Faulty gas control valve

How to Identify: Pilot and burner won’t stay lit despite new thermocouple and clean pilot; inconsistent gas flow

Part: Gas control valve

DIY Solutions

Relight the pilot and observe flame stability

Easy 5-10 minutes

Tools Needed: Matches or long lighter (if safe)

1. Turn gas control knob to OFF and wait 5–10 minutes for gas to clear
2. Follow heater-specific label directions to relight pilot flame
3. Observe the flame for stability after releasing control knob

⚠️ Safety First: Ensure area is well ventilated

Clean pilot orifice and tube

Moderate 30-60 minutes

Tools Needed: Compressed air, small brush, screwdriver

1. Turn off gas supply
2. Remove access panel to pilot assembly
3. Use compressed air/brush to clean pilot orifice and tube of any soot/debris
4. Reassemble and relight pilot

⚠️ Safety First: Turn off gas before cleaning

Check gas valve position and supply

Easy 5 minutes

1. Ensure main gas valve to heater is fully open
2. Check any inline shutoff valves are open
3. Test other gas appliance to confirm gas supply pressure

⚠️ Safety First: If gas smell is present, do not proceed and ventilate area

Next step

Choose the next step for not staying lit

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

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Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

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Professional Repairs

Replace thermocouple or thermopile

Estimated Cost: $50 - $150

Replace gas control valve

Estimated Cost: $200 - $400

Inspect/repair pilot assembly or ignition components

Estimated Cost: $100 - $300

When to Call a Professional

Pilot light repeatedly goes out after relighting

Gas odor present

You cannot locate or safely access pilot assembly

Preventive Maintenance

• Inspect and clean pilot assembly: Clogged pilot orifice and weak flame
  Frequency: annually
• Have gas water heater serviced: Thermocouple wear and gas valve issues
  Frequency: every 1–2 years

Frequently Asked Questions

Why is my Any Water Heater not staying lit?

Common causes include a faulty thermocouple, clogged pilot orifice, or gas supply issues.

How do I fix Any Water Heater not staying lit myself?

Try relighting the pilot, cleaning the pilot orifice, or checking the gas valve position.

How much does it cost to fix not staying lit?

Professional repairs range from $50 for a thermocouple replacement to $400 for a gas control valve.

When should I call a technician for not staying lit?

Call a technician if basic troubleshooting doesn’t resolve the issue, especially for complex repairs.

References & Sources

• How to Fix a Water Heater Pilot Light Repair-Blog

Common Issues Reported by Users

• Thermocouple malfunction (2 mentions)

User Suggested Solutions

1. Adjust the thermocouple to ensure it is in the pilot flame.

Community Discussions

pilot light goes out

Adjust the thermocouple to ensure it is in the pilot flame.

DIY View on Reddit →

Source: Reddit r/appliancerepair