Tankless Water Heater Pilot Light Not Working? Heres How To Fix It In A Flash!

Tankless water heaters have gained popularity for their energy efficiency and space-saving design. However, lighting the pilot light can be a daunting task for first-time users. This comprehensive guide will provide a step-by-step approach to lighting the pilot light of your tankless water heater, ensuring a trouble-free ignition and continuous hot water supply.

1. Safety First: Essential Precautions Before Ignition

Before attempting to light the pilot light, it’s crucial to take necessary safety precautions. Ensure that the gas supply is turned off, preventing any potential gas leaks. Open nearby windows or doors to provide proper ventilation, as some water heaters may emit fumes during ignition.

2. Locate Your Tankless Water Heater and Pilot Light

Identifying the location of your tankless water heater and its pilot light is essential. Typically, these units are installed in garages, basements, or utility closets. Once you’ve found the water heater, locate the pilot light assembly, usually a small metal tube with a knob or button labeled “Pilot.”

3. Turn Off the Gas Supply and Open the Water Supply

Before proceeding, turn off the gas supply valve connected to the water heater. This valve is typically located near the unit or on the gas line itself. Next, open the hot water faucet in a sink or shower to allow air to escape from the water lines. This step is crucial to prevent air pockets from interfering with the water flow.

4. Access the Pilot Light Assembly

Depending on your water heater model, you may need to remove a cover or access panel to expose the pilot light assembly. Follow the manufacturer’s instructions to safely remove any covers or panels.

5. Ignite the Pilot Light: Two Common Methods

There are two primary methods for igniting the pilot light: using a spark igniter or a manual ignition system.

Method 1: Spark Igniter

1. Press and hold the “Pilot” button or switch on the water heater.
2. Simultaneously, press the spark ignition button repeatedly until the pilot light ignites.
3. Keep the “Pilot” button or switch depressed for 30-60 seconds after ignition to allow the thermocouple to heat up and maintain the flame.

Method 2: Manual Ignition

1. Hold a long match or lighter near the pilot light assembly.
2. Press and hold the “Pilot” button or switch on the water heater.
3. Keep the “Pilot” button or switch depressed for 30-60 seconds after ignition to allow the thermocouple to heat up and maintain the flame.

6. Confirm Ignition and Adjust the Gas Flow

Once the pilot light is lit, observe the flame through the viewing window. It should be a steady blue flame. If the flame is yellow or flickering, adjust the gas flow using the control knob or valve until you achieve a stable blue flame.

7. Turn On the Gas Supply and Close the Water Faucet

With the pilot light ignited and stable, slowly turn on the gas supply valve. Open the hot water faucet you previously opened to allow water to flow through the system. Check for any leaks or unusual noises during this process.

Troubleshooting Common Ignition Issues

If you encounter difficulties lighting the pilot light or maintaining a stable flame, here are some common troubleshooting tips:

• Check for Obstructions: Ensure that the pilot light assembly is free of obstructions, such as dust, cobwebs, or debris.
• Inspect the Thermocouple: The thermocouple is a safety device that senses the presence of a flame. If it’s dirty or damaged, it may prevent the pilot light from staying lit.
• Clean the Burner Assembly: Over time, the burner assembly can accumulate soot and debris, affecting the pilot light’s ignition. Clean the burner according to the manufacturer’s instructions.
• Replace Old or Faulty Components: If the pilot light assembly or other components are worn out or malfunctioning, consider replacing them with genuine parts.

Wrapping Up: Enjoying Continuous Hot Water with a Properly Lit Pilot Light

By following these steps and addressing any potential issues, you can successfully light the pilot light of your tankless water heater and enjoy a continuous supply of hot water. Remember to consult the manufacturer’s manual for specific instructions and safety guidelines pertaining to your particular water heater model.

Common Questions and Answers

1. Why does my pilot light keep going out?

• Obstructed pilot light assembly
• Dirty or damaged thermocouple
• Faulty gas valve or control knob
• Draft or excessive wind near the water heater

2. What should I do if my pilot light won‘t stay lit?

• Check for obstructions, clean the thermocouple, and inspect the gas valve.
• Consider replacing old or faulty components if necessary.

3. How often should I light the pilot light on my tankless water heater?

• Typically, the pilot light should remain lit continuously. Only relight it if it goes out accidentally or during maintenance.

4. Can I light the pilot light without turning on the gas supply?

• No, the gas supply must be turned on to provide fuel for the pilot light.

5. Is it safe to use a tankless water heater without a pilot light?

• No, the pilot light is a safety feature that ensures the gas flow is ignited properly. Operating the water heater without a pilot light can be dangerous.