Can I relight the pilot light by myself on the water heater?

Author: scraper  |  Last update: Sunday, September 20, 2026

Yes, you can safely relight a water heater pilot light yourself. Most units have a convenient push-button spark igniter, though some older models require a long match. Always air out the area first, and if you ever smell a strong sulfur or rotten egg odor, do not attempt to light it and call your gas provider immediately.

Will a water heater work without a pilot light?

These heating elements function similarly to the coils on an electric stove, heating up as electric current flows through them, which then warms the surrounding water. Because there is no flame involved in the process, there's no need for a pilot light in electric water heaters.

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

After successfully lighting the pilot light, it typically takes 30 to 60 minutes for a gas water heater to fully heat a tank of water. The exact time depends on the tank's capacity, the temperature setting, and how cold the incoming water is.

Will my pilot light go out if I run out of propane?

Yes, any standing pilot lights will go out immediately when your propane supply runs out. Without fuel, the flame simply cannot stay lit.

Will you smell gas if the pilot light goes out?

Yes, if the pilot light goes out, you will often smell a distinct "rotten egg" or sulfur-like odor. Gas companies deliberately add this chemical (mercaptan) to natural gas and propane so that leaks are immediately detectable.

How to Light or Relight Your Water Heater Pilot

How many years can you refill a 20 lb propane tank?

A 20 lb propane tank can be refilled for 12 years from its date of manufacture. After this initial 12-year period, it is illegal to refill the tank unless it passes a safety inspection and is legally recertified, which extends its refilling life for another 5 years.

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

A 20-minute shower typically uses 30 to 50 gallons of total water. Assuming a standard 60/40 mix of hot and cold water, you will use between 18 and 30 gallons of hot water, depending on your showerhead and water pressure.

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 long should I have hot water with a 40 gallon tank?

A standard 40-gallon hot water tank typically provides about 8 to 10 minutes of continuous hot water for a high-flow shower. With water-saving, low-flow showerheads (1.5–2.0 gallons per minute), this can be extended to roughly 15-20+ minutes.

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

It is a common issue for a water heater pilot light to go out. While it shouldn't happen constantly, occasional outages can be triggered by strong drafts, dirt or dust buildup blocking the air intake, or standard wear-and-tear on internal safety components.

What is the water heater called that doesn't run out of hot water?

As a result, tankless water heaters deliver a constant supply of hot water. You don't need to wait for a storage tank to fill up with enough hot water. However, a tankless water heater's output limits the flow rate.

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

The earliest signs of a water heater failing include inconsistent water temperatures, discolored or foul-smelling water, unusual rumbling or popping noises from the tank, and visible moisture or small puddles around the base. Most traditional tank water heaters last between 8 and 12 years.

Is it safe to relight a water heater pilot?

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 long does it take for hot water after relighting a pilot?

It typically takes 30 to 40 minutes for a gas water heater to heat a full tank of water after relighting the pilot light.

Is it an emergency if the pilot light goes out?

A pilot light going out is rarely an immediate emergency, as most modern gas appliances have built-in safety valves that automatically stop gas flow. However, it requires prompt attention.

What's the average cost to fix a pilot light?

The average cost to fix a pilot light ranges from $100 to $250, including parts and labor. A standard diagnostic fee to have a professional inspect the unit costs between $50 and $100.

What is the 4 minute shower rule?

The 4-minute shower rule is a water-conservation and energy-saving guideline that encourages people to limit their daily showers to exactly four minutes. Championed by environmental organizations and utility companies, it is designed to cut down on utility bills and lower carbon emissions.

Why do I run out of hot water in 15 minutes?

When your hot water only lasts 15 minutes, it usually means your water heater is struggling to heat water fast enough or the hot water is mixing with cold water. The most common culprits are a broken dip tube, a faulty lower heating element (on electric tanks), or excessive sediment buildup.

What runs your water bill up the most?

A hidden plumbing leak—especially a running toilet or a busted underground irrigation line—runs your water bill up the most. After unseen leaks, the largest normal contributors to household water usage are toilets, showers, and outdoor irrigation.

Is it illegal to fill expired propane tanks?

Doing so is both dangerous and illegal and will result in fines for us and the very real possibility that we will have our propane license revoked. Before bringing in a propane tank for refill please look at the date stamped on your tank. It is good for 12 years past the stamped date.

How long will 500 gallons of propane last in a house?

A 500-gallon propane tank generally lasts between 2 to 14 months, with an average of about 5 months. Because propane tanks can only be filled to 80% capacity to allow for safe gas expansion, a "full" 500-gallon tank holds about 400 gallons of usable fuel.

How much does it cost to fill a 20lbs propane tank?

Refilling an empty 20-pound propane tank generally costs between $15 and $20, depending on local rates and how much your specific tank needs. If you choose to swap your tank at a drop-off cage, the cost is usually $20 to $25.

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