Is it safe to relight water heater pilot?

Author: scraper  |  Last update: Tuesday, August 25, 2026

Yes, it is generally safe to relight a water heater pilot light yourself, provided you follow the manufacturer's specific instructions and smell no gas. However, because you are dealing with a flammable gas, strict safety precautions are absolutely essential.

How rare are water heater explosions?

The chances of a water heater exploding are extremely rare—roughly less than 0.02% of all reported water heater incidents. Because modern units are built with rigorous safety features like the Temperature and Pressure (T&P) relief valve, a catastrophic explosion is highly unlikely unless multiple safety systems fail simultaneously.

How long does it take for water to heat up after relighting the pilot?

Here are some common heat up times for different water heaters, assuming the appliances are new and properly sized for the home: Electric storage tank water heater: 60–80 minutes. Propane storage tank water heater: 30–40 minutes. Propane tankless water heater: 0 minutes.

Is it an emergency if the pilot light goes out?

A pilot light going out is not always dangerous, but it should be addressed quickly. Most modern furnaces include safety features that shut off the gas supply if the pilot flame goes out. However, if you smell gas or cannot safely relight the pilot light, you should contact an HVAC professional immediately.

What to do after relighting a water heater?

Now that the pilot light is back on, slowly depress the gas control knob. Monitor the pilot light to make sure it stays lit even after the control knob is released. You can then turn the gas control knob back to the on position or your preferred temperature.

How To Light A Gas Water Heater Pilot Light

How many gallons of hot water for a 20 minute shower?

If a standard showerhead is fitted, it will use around an extra half a gallon each minute, accounting for a 25-gallon emittance every 10 minutes, or 50 gallons throughout a 20-minute shower. *1 gallon = 4.54 litres.

Can a water heater leak carbon monoxide?

Yes, a gas or propane water heater can leak dangerous carbon monoxide (CO) into your home. This usually happens due to poor ventilation, an obstructed exhaust flue, or incomplete combustion caused by a lack of fresh air.

Will gas leak if the pilot light goes out?

Yes, unburned gas will leak if a pilot light goes out, but the danger level depends on the type of appliance and its safety features.

Are pilot lights a fire hazard?

Increase Safety: While a pilot light is not a significant fire hazard, there is a small risk that it could cause a gas leak. The summer heat could ignite the fuel, resulting in a fire or explosion.

What are the first signs of a water heater going bad?

Signs a Water Heater is Going Bad

  • Your Water Heater Makes Strange Noises. ...
  • Decreased or Varying Water Temperature. ...
  • Low Water Pressure. ...
  • Discolored or Rusty Water. ...
  • Hot Water Shortage. ...
  • Water Heater Leaks. ...
  • Frequent Repairs. ...
  • Age of Hot Water Heater.

Is it safe to relight a pilot light on a water heater?

Yes, it is generally safe to relight a water heater pilot light yourself, provided you follow the manufacturer's specific instructions and smell no gas. However, because you are dealing with a flammable gas, strict safety precautions are absolutely essential.

How often should a pilot light be checked?

Schedule Annual Inspections: A yearly HVAC inspection is one of the best ways to catch potential issues early. A technician will clean critical components, test the thermocouple, and ensure proper gas flow for reliable operation. Test the Thermocouple: Thermocouples can wear out over time.

How many hours a day should hot water be on?

Only heat the hot water twice a day

Try heating the water for an hour in the morning and an hour in the evening. Start the water heating about an hour before you need it. For example, if you shower at 08:30, start heating the water at 07:30. If you wash up in the evening at 19:30, then start the water heating at 18:30.

Are there signs before a water heater explodes?

The warning signs of a water heater explosion include popping or rumbling noises, rust-colored water, visible leaks around the tank, and a faulty T&P valve. If you notice any of these signs, turn off your water heater and call a plumber immediately.

What's the average life expectancy for a hot water heater?

Based on the manufacturer's suggested service life, the average life expectancy of a water heater is about 8 to 12 years. That varies with the location and design of the unit, quality of installation, maintenance schedule and water quality.

How much is a 40 gallon hot water heater worth in scrap?

Understanding the value of scrap water heaters can significantly impact your bottom line. With steel prices ranging from $0.05–$0.08 per pound, a standard residential tank can yield $10–$25. Larger commercial units may bring in $50 or more. Staying informed about market fluctuations is crucial for accurate estimates.

Are there warning signs before a gas explosion?

Hissing or Whistling Sounds: Gas escaping a pipe under pressure often creates a hissing or whistling sound. The intensity depends on the size of the leak. Larger leaks might even produce a roaring sound. If you hear this, get out and don't hesitate!

What is the number one appliance that causes house fires?

Stoves and ovens (cooking equipment) are the leading cause of house fires. According to the National Fire Protection Association (NFPA), cooking is the number one cause of home fires and injuries, primarily due to unattended cooking, grease buildup, and human error.

Can pilot light cause carbon monoxide poisoning?

Yes, a pilot light can cause carbon monoxide. Because it burns fossil fuels (like natural gas or propane), carbon monoxide is produced as a byproduct of combustion. While a properly adjusted and ventilated flame is usually not dangerous, problems arise if the system malfunctions.

What are the first signs of a gas leak?

The first signs of a gas leak usually involve a distinct rotten egg or sulfur smell (due to an added odorant), a persistent hissing or whistling sound near gas lines, or physical symptoms like sudden dizziness, headaches, or nausea.

Is it common for a water heater pilot light to go out?

There are several reasons why your water heater pilot light keeps going out: Thermocouple issues: If the thermocouple is faulty or dirty, it can be the reason why does the pilot light go out on water heater. Drafts: Strong drafts can blow out the pilot light. This is common in basements or poorly ventilated areas.

Can you sleep in the same room as a gas fire?

Sleeping in the same room as an open flued gas appliance (back boiler or gas fire) contravenes the gas safety regulations and puts your life in danger. If you are found to be sleeping in the same room as an open flued appliance during one of our visits, your gas heating appliance will be capped off for safety reasons.

How soon will you know if you have carbon monoxide poisoning?

The time it takes to realize carbon monoxide (CO) poisoning is occurring varies significantly based on the concentration of the gas in the environment and an individual's health. Because carbon monoxide is colorless, odorless, and tasteless, it is often called a "silent killer," and people may not realize they are being exposed until symptoms become serious.

Which gas is called the silent killer?

The term "silent killer gas" almost universally refers to Carbon Monoxide (CO). It is a colorless, odorless, and tasteless gas produced by the incomplete burning of fossil fuels (like wood, coal, propane, and gasoline). It is deadly because it replaces oxygen in your bloodstream, preventing vital organs from functioning.

What fumes come out of a water heater?

However, if your gas water heater is not getting adequate combustion air, or if the exhaust is not venting properly due to blockage or incorrect installation, combustion gases could be back-drafted into the home — exposing the residents to carbon monoxide (CO) and other harmful gases.

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