Knowing how to relight pilot light on water heater units can save you from a cold shower and an unnecessary call-out fee. In most cases, a pilot light goes out due to a brief gas supply interruption, a draught, or a dirty thermocouple — and relighting it takes less than ten minutes with no special tools required.
Why Your Pilot Light Goes Out in the First Place
Before you start turning knobs, it helps to understand what caused the problem. Victoria’s climate — with its gusty winters and unpredictable weather changes — can create draughts around gas appliances, especially in older homes with less insulation around utility areas. A sudden gust through a laundry or garage can extinguish a pilot flame instantly.
Other common culprits include a faulty thermocouple (the small sensor that detects the pilot flame and keeps the gas valve open), a temporary interruption to your gas supply, or a build-up of dust and debris around the burner assembly. If your pilot light keeps going out repeatedly, that’s a sign something deeper needs attention — but for a one-off outage, relighting it yourself is perfectly reasonable.
Safety First: What to Check Before You Begin
Gas appliances demand respect. Before you attempt anything, take a moment to check for the smell of gas near the unit. If you detect even a faint sulphur or rotten-egg odour, do not attempt to relight the pilot. Leave the area, ventilate the space, and contact your gas supplier or a licensed gasfitter immediately.
If there’s no smell of gas, you’re clear to proceed. Make sure the area around the water heater is free of flammable materials, and ensure you have good lighting so you can clearly see the controls and the pilot assembly. Australian gas appliances must comply with AS 4552 and related standards, so always follow the manufacturer’s instructions printed on the unit’s label — they take precedence over any general guidance.
How to Relight Pilot Light on Water Heater: Step-by-Step
Most storage gas water heaters in Victorian homes follow a similar relighting procedure. Here’s what to do:
- Turn the gas control knob to “OFF” and wait at least five minutes. This allows any residual gas to dissipate safely before you introduce a flame.
- Locate the pilot assembly. Remove the access panel at the base of the unit. You should see the burner and a small tube leading to the pilot nozzle.
- Turn the control knob to “PILOT”. This setting allows a small amount of gas to flow to the pilot tube only.
- Press and hold the pilot button (or control knob, depending on the model). This manually opens the gas valve to the pilot.
- While holding the button down, use a long-reach lighter or long match to ignite the pilot flame at the pilot nozzle. Keep the button depressed for 30–60 seconds after ignition to allow the thermocouple to heat up and hold the valve open.
- Slowly release the button. If the flame stays lit, you’ve succeeded. If it goes out, wait five minutes and repeat the process.
- Turn the control knob to your desired temperature setting (typically “HOT” or a marked temperature). Replace the access panel and allow 30–60 minutes for the water to reheat.
It’s worth checking your hot water unit’s label for model-specific instructions, as some newer units have electronic ignition systems that simplify the process further. For more tips on maintaining your home’s plumbing systems, visit the Blu-Stream Plumbing blog for practical guides tailored to Victorian homeowners.
What to Do If the Pilot Won’t Stay Lit
If you’ve followed the steps above and the pilot flame refuses to stay lit after two or three attempts, the thermocouple is the most likely cause. This small component sits in the pilot flame and generates a tiny electrical signal that tells the gas valve to stay open. When it fails or becomes coated in residue, it can no longer hold the valve open — and the flame dies.
A thermocouple is a relatively inexpensive part, but replacing it does involve working directly with gas components. In Victoria, any work that involves disconnecting or modifying gas fittings must be carried out by a licensed gasfitter under the Gas Safety Act 1997 (Vic). If you’re comfortable simply cleaning the thermocouple tip with fine steel wool (without disconnecting anything), that’s a DIY-friendly first step — but replacement should be left to a professional.
Other reasons the pilot may not stay lit include a partially blocked pilot orifice, low gas pressure, or a failing gas control valve. If your unit is more than 10–12 years old, it may simply be reaching the end of its serviceable life. You can learn more about your options by exploring licensed gasfitting services available in your area.
When to Call a Professional
There are situations where relighting the pilot yourself is not the right move. If you smell gas at any point, if the unit has visible corrosion or damage, if water is leaking from the tank, or if the pilot goes out more than once a week, it’s time to stop troubleshooting and call a licensed plumber or gasfitter.
Attempting to repair gas components without the appropriate licence is not only dangerous — it’s illegal in Victoria. The team at Blu-Stream Plumbing are fully licensed and experienced in hot water system repairs across the region. Whether you need a thermocouple replacement, a full unit assessment, or advice on upgrading to a more energy-efficient system, they can help you get your hot water back on safely and quickly.
Conclusion
Understanding how to relight pilot light on water heater units is a genuinely useful skill for any Victorian homeowner. In most cases, the process is straightforward, safe, and takes less than ten minutes — no tradesperson required. The key steps are: turn off the gas and wait, switch to pilot mode, hold down the pilot button, ignite the flame, and allow the thermocouple to warm up before releasing.
That said, if the problem keeps recurring, if you detect gas, or if the unit shows signs of wear or damage, don’t push your luck. Reach out to Blu-Stream Plumbing for a professional assessment. Cold showers are inconvenient — a gas incident is far worse. Stay safe, follow the manufacturer’s instructions, and know when to hand it over to the experts.
Frequently Asked Questions
How long does it take for hot water to return after relighting the pilot?
Once the pilot is successfully relit and the burner ignites, most standard storage water heaters in Victorian homes take between 30 and 60 minutes to fully reheat a tank of cold water. Larger tanks (250L or more) may take up to 90 minutes. Avoid running hot taps during this period to allow the tank to recover fully.
Is it safe to relight a pilot light myself in Victoria?
Yes, relighting a pilot light is considered a safe DIY task for homeowners, provided there is no smell of gas and you follow the manufacturer’s instructions on the unit. However, any repair or replacement of gas components — including the thermocouple or gas valve — must be performed by a licensed gasfitter under Victorian gas safety regulations.
Why does my pilot light keep going out repeatedly?
A pilot light that keeps extinguishing is usually caused by a worn or dirty thermocouple, a draught near the appliance, a blocked pilot orifice, or low gas pressure. If it happens more than once or twice, it’s best to have a licensed professional inspect the unit rather than continuing to relight it, as repeated outages can indicate a more serious underlying fault.
Can a pilot light outage damage my water heater?
A pilot light going out on its own won’t cause direct damage to the unit — the thermocouple is specifically designed to shut off the gas supply when the flame is not detected, preventing gas build-up. However, leaving the issue unaddressed for extended periods, especially in cold Victorian winters, can put stress on other components and may reduce the overall lifespan of the system. For more about what we do, visit our homepage.