Get your gas heater serviced before the first cold night.

Gas Heater Servicing in Canberra: When, Why, and How Much

Published: April 2026 | By Jack Macfadyen, Licensed Plumber

Gas heaters should be professionally serviced every 2 years, which is the interval most manufacturers set out in their own instructions. A standard gas heater service in Canberra costs between $120 and $250 depending on the type of heater and accessibility, and includes a safety inspection, cleaning, and carbon monoxide check. Get it done before winter, while a fault is still an inconvenience rather than a cold house on a Sunday night.

How Often Should You Service a Gas Heater in the ACT?

Every 2 years is the recommended interval for gas heaters in the ACT, and it matches what most manufacturers say and what the Australian Standards set out for gas appliance maintenance. Some manufacturers ask for annual servicing on older units, so check your heater's manual or the data plate on the unit itself.

Past ten years old, service it annually no matter what the manual says. Older heaters start having trouble with heat exchangers, burners and seals, and those are the parts that matter for both performance and safety.

Landlords do not have a gas-specific servicing mandate in the ACT. There is no two yearly gas safety check requirement here. That is a Victorian tenancy rule, and people often assume it applies nationally. What does bind you is section 16 of the Gas Safety Act 2000, which makes the owner of a gas appliance take reasonable steps to keep it in good condition and repair and safe to use. That is an offence provision, not guidance. The same section treats acting on the manufacturer's instructions, or a gas fitter's advice, as the way you discharge the duty, so service to the interval in the manual and keep the invoice. Alongside that, the standard tenancy terms make the lessor responsible for keeping the premises in a reasonable state of repair, and a gas leak or a heater that has stopped working is an urgent repair. Our post on who pays for plumbing repairs in an ACT rental sets out the timeframes.

The 2 year interval comes from the manufacturer rather than from an ACT servicing rule. What ACT law does set is who is allowed to touch the appliance. Gas fitting here is regulated by Access Canberra under the Gas Safety Act 2000 and the Gas Safety Regulation 2001, with the technical codes made by the ACT Technical Regulator under the Utilities (Technical Regulation) Act 2014. Interstate regulators such as Energy Safe Victoria have no role in the ACT, so if a service company quotes Victorian rules at you, ask which ACT instrument they are working to.

What Is Included in a Gas Heater Service?

A proper gas heater service is more than a quick look and a dust-off. Here is what a thorough service includes:

• Going over the heater, the flue and the gas connections by eye for damage, corrosion or wear
• Pulling the burner assembly out and cleaning it, so the flame burns evenly across the whole burner
• Checking the heat exchanger for cracks or deterioration, which is what lets combustion gases into the room you are sitting in
• Measuring CO levels in the flue gases with a gas analyser. This is the safety check that matters most.
• Testing that the gas supply pressure sits inside the correct range for that appliance
• Running the thermostat and the safety controls to confirm the heater responds the way it should
• Inspecting the flue pipe for blockages, disconnections or damage that would stop combustion gases venting safely outside
• Cleaning or replacing the air filters so airflow and efficiency stay where they should be

How Much Does Gas Heater Servicing Cost in Canberra?

According to industry data from ServiceSeeking and Hipages, gas heater servicing costs in Australia typically range from $120 to $250. The price depends on several factors:

• What sort of heater it is. A wall-mounted space heater is a quicker job than a ducted gas system.
• How easy it is to get to. Heaters jammed into a tight cupboard, up on a roof or under the floor take longer before any work even starts.
• Age and condition. An older unit usually needs more cleaning and more testing.
• Parts. If something has to be replaced during the service, that sits on top of the service fee.

Ducted gas heating lands at the higher end. There are more components, longer flue runs, and more of the system to work through properly. Our ducted heating and cooling service covers the lot, the unit itself through to the ductwork and the outlets.

What Are the Signs Your Heater Needs Servicing Sooner?

Do not wait for the 2-year mark if you notice any of these. They mean the heater needs attention now:

• A yellow or orange flame. A healthy gas flame is blue. Yellow or orange means incomplete combustion, and incomplete combustion produces carbon monoxide. Turn the heater off and call a licensed gas fitter immediately.
• A smell that is not right. A faint gas smell as the heater first fires can be normal, but a smell that hangs around, or a sharp acrid odour, is not. Turn off the heater and ventilate the room.
• A pilot light that keeps dropping out. That points to a faulty thermocouple, a blocked pilot tube, or a draught coming back down the flue.
• Soot or discolouration. Black marks around the heater or on the wall behind it are a sign of incomplete combustion.
• Noises you have not heard before. Banging, popping or rattling usually means loose components, a dirty burner, or the heat exchanger expanding where it should not.
• A heater that runs but never warms the room. Look at the burner, the filter, and on ducted systems the ductwork.

Why Is Carbon Monoxide Testing So Important?

Carbon monoxide has no smell, no colour, and it can kill you. A cracked heat exchanger or a blocked flue lets it into the house and you will not know it is there. You cannot detect it without an instrument, which is why measuring the flue gases with an analyser is the part of a service you are really paying for.

Low-level exposure gives you headaches, dizziness, nausea and fatigue. People put that down to the flu, which is exactly why CO poisoning gets called "the silent killer." A heater that has been serviced properly, with a flue that is intact and venting where it should, is what keeps it out of the house.

Get a carbon monoxide alarm if you do not already have one. They cost very little and they cover you between services.

What Is the Difference Between Ducted and Wall Heater Servicing?

Both need regular servicing. The job itself is different.

Wall-mounted space heaters are the simpler of the two. The burner, the heat exchanger and the flue are all reachable from the one spot. A standard service runs 30 to 60 minutes and sits at the lower end of the cost range.

Ducted gas heating takes more work. The central unit gets the same treatment (burner, heat exchanger, fan motor, filters), and then the ductwork has to be checked for leaks, disconnections and damaged insulation. Done properly that is 60 to 90 minutes, and the price reflects it.

Why Should You Service Before Winter in Canberra?

Canberra winters are cold. Overnight temperatures sit below zero for stretches of June, July and August, and most houses here lean on gas heating to get through it. The worst time to find out the heater is dead is the first properly cold night of the season.

Booking the service in autumn, March through May, works in your favour:

• Gas fitters are less flat out before winter than during it, so you get an appointment sooner.
• If the service turns up something that needs parts or a bigger repair, there is time to sort it out while you can still go without the heater for a few days.
• A heater that fails on a freezing night is an emergency callout at emergency rates. The same fault caught in April is a normal appointment at normal rates.