Mystery solved: why your water heater pilot light keeps extinguishing

A water heater pilot light is a small flame that ignites the main burner when you need hot water. When this pilot light goes out, you’ll be left with cold showers and dishes. While it can be frustrating, understanding the reasons why your water heater pilot light goes out can help you quickly troubleshoot and resolve the issue.

Reasons for Pilot Light Extinguishment

1. Gas Supply Interruption

One of the most common reasons for a pilot light to go out is a disruption in the gas supply. This can be caused by:

• Closed gas valve: Ensure that the gas valve leading to the water heater is fully open.
• Empty propane tank: If your water heater uses propane, check if the tank is empty.
• Gas line obstruction: Inspect the gas line for any kinks, blockages, or leaks that may restrict gas flow.

2. Faulty Thermocouple

The thermocouple is a safety device that detects the presence of a pilot flame and sends a signal to the gas valve to keep it open. If the thermocouple becomes damaged or misaligned, it can prevent the pilot light from staying lit.

3. Draft or Wind

Strong drafts or gusts of wind can blow out the pilot light. This is especially common in areas with open windows or doors near the water heater.

4. Debris or Blockage

Dust, lint, or other debris can accumulate around the pilot light and block the flame. This can prevent the pilot light from igniting or staying lit.

5. Faulty Ignition Switch

The ignition switch is responsible for supplying electricity to the pilot light. If the switch is faulty, it may not provide enough power to ignite the flame.

6. Water in the Gas Line

Water in the gas line can prevent gas from reaching the pilot light. This can be caused by condensation or a leak in the gas line.

7. Dirty Pilot Light Assembly

Over time, the pilot light assembly can become dirty or corroded. This can interfere with the proper functioning of the pilot light.

Troubleshooting and Solutions

1. Check the Gas Supply

• Ensure that the gas valve is open.
• If using propane, check the tank level.
• Inspect the gas line for any obstructions or leaks.

2. Inspect the Thermocouple

• Check if the thermocouple is properly connected to the pilot light and gas valve.
• If the thermocouple is damaged or misaligned, replace it.

3. Protect from Draft

• Block any drafts or wind that may be blowing out the pilot light.
• Consider installing a draft hood or wind screen around the water heater.

4. Clean the Pilot Light Assembly

• Gently brush away any debris or dirt from the pilot light assembly.
• Use a soft cloth to wipe down the pilot light and surrounding area.

5. Replace the Ignition Switch

• If the ignition switch is faulty, replace it with a new one.
• Ensure that the new switch is compatible with your water heater model.

6. Remove Water from Gas Line

• If there is water in the gas line, drain it by turning off the gas supply and opening the valve at the appliance.
• Once the water is drained, close the valve and turn the gas supply back on.

7. Contact a Professional

• If you have tried the above troubleshooting steps and the pilot light still goes out, contact a licensed plumber or gas technician for assistance.

Wrapping Up: Avoiding Future Extinguishments

By understanding the reasons why your water heater pilot light goes out, you can take preventive measures to avoid future occurrences. Regular maintenance and prompt repairs can ensure that your water heater operates efficiently and provides you with hot water when you need it.

Common Questions and Answers

Q1: Why does my water heater pilot light go out after a few minutes?
A: This could indicate a faulty thermocouple or a dirty pilot light assembly.

Q2: Can I relight the pilot light myself?
A: Yes, but follow the manufacturer’s instructions carefully and ensure that the gas supply is turned off before attempting to relight the pilot light.

Q3: How often should I clean the pilot light assembly?
A: It is recommended to clean the pilot light assembly annually or as needed.