Every winter, Gas Experts Melbourne attends dozens of emergency callouts for gas heaters that have stopped working in the middle of a cold snap. In the vast majority of cases, the breakdown could have been prevented. The heater had not been serviced in years. Sometimes it had never been serviced at all.
This article gives you the straight answer on how often your gas heater should be serviced, what the specific recommendation is for different types of heaters and ages, and, most importantly, why skipping a service is not just an inconvenience risk. For older heaters, it is a genuine safety risk.
Victoria's energy safety guidelines recommend that gas heaters be serviced by a licensed gas fitter at least once every two years. This is the minimum standard: not the ideal.
For most Melbourne households, annual servicing is the right approach. Here is why.
Melbourne's winters are genuinely cold. In many suburbs, particularly the outer east, the Dandenong Ranges corridor and the Mornington Peninsula, overnight temperatures regularly drop to single digits from May through to August. For Melbourne families, a gas heater is not a convenience. It is essential.
A gas heater that runs through an entire Melbourne winter is working hard. Dust accumulates on the burner. The heat exchanger undergoes thousands of thermal cycles. Components wear. Seals age. Pilot assemblies degrade.
Annual servicing catches the small faults, a partially blocked burner port, a thermocouple beginning to fail, a flue connection that has loosened slightly, before they become the large faults that leave you without heating on a freezing July night.
The right service frequency depends on your heater type, its age and how heavily it is used.
These are the most common gas heaters found in Melbourne homes, particularly those built between the 1960s and the 1990s. At this age, annual servicing is not just recommended, it is the responsible choice. Heat exchanger failure, thermocouple deterioration and pilot assembly issues are all more likely as these heaters age, and annual servicing catches them before they become dangerous.
Ducted systems heat the entire home and run for extended periods through winter. The return air filter should be cleaned by the homeowner every 6 to 8 weeks during heavy use, but a professional annual service is still essential. The professional service covers things you cannot do yourself: the CO combustion test, the heat exchanger inspection, the gas pressure test and the fan motor assessment.
Gas fireplaces tend to sit dormant through spring and summer, accumulating debris in the burner assembly and ceramic log arrangement. An annual service before the heating season confirms safe combustion and correct flue operation.
Even a brand new heater benefits from a professional check after its first year of operation. This confirms it is performing as intended and gives you a documented service record from day one.
If your gas heater is your primary source of heating through a Melbourne winter, service it every year. The cost of one annual service, typically $150 to $250, is nothing compared to an emergency call-out in July. And for older heaters, the annual carbon monoxide test that comes with every professional service is not optional. It is essential.
What Happens If You Skip a Service?
This is the question most people do not think about until it is too late. Here is what actually happens inside a gas heater that does not receive regular professional attention.
Gas heaters draw air through the appliance and over the heat exchanger. Over time, dust and debris accumulate on burner ports, inside the heat exchanger and on fan blades in ducted systems. This restricts airflow and reduces combustion efficiency. The heater works harder to produce the same heat and your energy bills increase. Eventually, the blockage becomes severe enough to cause a fault.
The thermocouple is the small safety device that detects the pilot flame and keeps the gas valve open. In older heaters with a standing pilot light, the thermocouple is one of the most critical, and most frequently failing, components. A thermocouple that is tested annually and replaced when it shows signs of weakening does not fail at 6am on a winter morning. One that has never been inspected might.
Every heating cycle, turning on, heating, cooling, turning off, causes the metal heat exchanger to expand and contract slightly. Over years and decades of use, this thermal cycling causes metal fatigue and, eventually, micro-cracks. These cracks allow combustion gases including carbon monoxide to enter the air circulating through your home. A cracked heat exchanger is a serious safety issue that produces no obvious symptoms and can only be identified by a professional inspection and CO test.
Seals and fittings on gas connections deteriorate with age and thermal cycling. Slow leaks develop that are undetectable by smell. A gas pressure test during a professional service identifies these leaks before they become a safety risk.
If any of the following apply to your heater, do not wait for your next scheduled service. Call us now.
- The heater takes multiple attempts to ignite
- The pilot light goes out repeatedly
- The heater produces less heat than it used to
- Your gas bills have increased without a change in usage
- The heater makes unusual noises banging, rattling, grinding
- Yellow or orange flames instead of blue
- A persistent gas smell from the heater
- Multiple household members experiencing unexplained headaches or fatigue that improve when they leave the home
- The heater shows an error code
- The heater has not been serviced in over two years
What Is Included in a Professional Gas Heater Service?
A Gas Experts Melbourne service is not a quick visual inspection and a signature on a form. It covers every major component of your gas appliance.
- Full burner clean and inspection
- Heat exchanger inspection visual check for cracks and deterioration
- Gas pressure test at all connections and fittings
- Electronic gas leak detection at all connections
- Pilot light and ignition system inspection, clean and test
- Thermocouple inspection and test
- Thermostat calibration
- Fan motor inspection (ducted systems)
- Return air filter inspection and clean (ducted systems)
- Flue inspection condition, connections and external termination
- Carbon monoxide combustion test the most important safety check
- Written service record provided on completion
Every professional gas heater service we carry out includes a carbon monoxide combustion test. This is the single most important safety check we perform.
CO is produced when gas appliances do not burn gas completely. It is colourless, odourless and cannot be detected without testing equipment or a CO alarm. A gas heater with a cracked heat exchanger can produce elevated CO levels while appearing to operate perfectly normally. The occupants of the home may notice unexplained headaches or fatigue, or they may not notice anything at all.
For any gas heater over 10 years old, the CO test is the most important reason to have the heater serviced annually. Not because we expect to find a problem: but because if there is one, we need to find it before it harms your family.
Booking a gas heater service with Gas Experts Melbourne is straightforward.
- Call 0468 279 956 we are available 7 days a week
- Book online at gasexpertsmelbourne.com.au no call-out fee when you book online
- Same-day appointments available across Melbourne
- Fixed price confirmed before we start
- Free safety check and CO test included with every service
Do not wait until your heater stops working. Book your annual service before winter and head into the cold months with the confidence that your gas heating is safe, clean and ready to perform.
