How Often Should You Service a Gas Heater? (Adelaide 2026)

Published 22 April 2026 · Written by Sidney — Licensed Gas Fitter, Pilot Gas Adelaide · 8 min read

TL;DR: Service your gas heater every two years if it's under 10 years old, and every year if it's older, ducted, or your household has anyone with asthma or heart conditions. Skipping services risks carbon monoxide exposure, cracked heat exchangers and warranty voids. Book in March–May, before winter hits.

The short answer

If your gas heater is under ten years old and works flat out only in winter, get it serviced every two years. If it's older than ten, runs often, is ducted, or anyone in the house has asthma, emphysema or heart trouble, make it every year.

That's the guidance we give every Adelaide homeowner who rings us, and it lines up with what manufacturers like Braemar, Brivis, Bonaire and Rinnai publish in their own owner's manuals.

If you haven't serviced yours in the last two winters and you can't remember what was checked, book one now. The worst conversation I have with customers is the one that starts with "it was fine last year."

Why servicing actually matters

Gas heaters burn a fuel inside your house. That's the bit people forget. A service isn't a cosmetic polish — it's a safety inspection that catches problems before they hurt someone or leave you without heat in July.

In our 12 years servicing Adelaide homes, the three most common issues we find during a routine service are:

• Lint, dust and pet hair clogging the burner and heat exchanger. Adelaide's dry summers dump a lot of dust into ducts. If it's not cleared, the heater runs hot and inefficient.
• Cracked or corroded heat exchangers, especially on units 12+ years old. A crack means combustion gases — including carbon monoxide — can mix with the warm air blowing into your living room.
• Dodgy pilot assemblies and ignition electrodes causing rough starts, sooting and incomplete combustion.

A proper service picks these up. A DIY "it still blows warm so she'll be right" does not.

Service schedule by heater type

Wall furnaces (Vulcan Heritage, Pyrox, Braemar Econ)

Every two years. These are simple beasts — fewer moving parts than ducted — but the heat exchangers on older Vulcans and Pyroxes are notorious for corrosion. If yours is pre-2010, make it annual.

Ducted gas heating (Braemar, Brivis, Bonaire)

Every two years if under ten years old, annual after that. Ducted units work harder, move more air, and have more components that fail — fan motors, gas valves, control boards. The ductwork itself also collects debris that the technician should inspect.

Space heaters and flued room heaters (Rinnai Energysaver, Cannon Canterbury, Regency)

Annual. These sit in the living room, run long hours, and any combustion problem goes straight into your air. Worth the hundred-odd bucks a year.

Outdoor or alfresco gas heaters

Annual — and always check hoses and regulators yourself before each winter. UV and heat destroy rubber components fast in SA's summer.

What happens if you skip it

Safety warning: Carbon monoxide is colourless, odourless and can kill you in your sleep. A cracked heat exchanger on an un-serviced heater is one of the main causes of residential CO exposure in Australia. This is not a scare tactic — it's why gas fitters exist.

Skipping service usually leads to one of four outcomes:

1. Carbon monoxide leaks from cracked heat exchangers or blocked flues. Symptoms start as headaches and nausea and get worse from there. If you've got a gas heater, read our CO safety guide and fit a CO alarm.
2. Higher gas bills. A dirty burner can push gas consumption up 15–25% for the same heat output. One service often pays for itself inside a season.
3. Mid-winter breakdowns. The heater that "was fine last year" stops on the coldest night of June. Emergency call-outs cost 2–3x a scheduled service, if you can even get one.
4. Warranty voids. Most manufacturers require documented servicing. No records, no warranty claim when the control board packs it in.

When to book in Adelaide

Best window: mid-March to early May. That gives you time to run the heater briefly, notice anything off, get it fixed, and not fight every other Adelaide homeowner for the same booking slot in June.

By late May our diary is usually full two weeks out. By mid-June it's three to four. If your heater fails in the first week of July, you'll be waiting — or paying emergency rates.

We run pre-season service specials every April. Same fitter, same checks, better availability, better price.

What to do between services

You don't need to be a gas fitter to help your heater between services. A few five-minute habits make a real difference:

• Vacuum the return air grille monthly during winter. Dust here is the number-one cause of weak airflow.
• Clear a 1-metre zone around the heater. No boxes, no washing baskets, no curtains.
• Check the flue outside — no bird nests, no leaves, no cobwebs on the cowl.
• Listen. New rattles, booms on start-up, or smells mean ring a fitter, not wait for the next scheduled service.
• Test your CO alarm every month (and if you don't have one, get one — they're $40).

Want the full seasonal routine? Our Adelaide winter heating checklist runs through exactly what to do and when.

Warranty and manufacturer requirements

Most gas heater warranties in Australia — Braemar, Brivis, Bonaire, Rinnai — require the unit to be serviced "in accordance with the manufacturer's recommendations" to stay valid. In plain English, that usually means at least every two years, by a licensed gas fitter, with the service recorded.

We leave a stamped service record in a sticker on the side of every unit we service, plus a digital record emailed to you. That's the evidence you need if you ever claim under warranty or sell the house.

For the full regulatory picture, the SA Department for Energy and Mining and Energy Safe Victoria both publish clear gas safety guidance worth a read.

FAQ

Is servicing a gas heater really necessary?

Yes. It's a combustion appliance burning gas inside your home. Unserviced heaters are the most common source of residential CO exposure in Australia. It's also required to keep your warranty valid.

How long does a gas heater service take?

45 minutes to 90 minutes depending on the heater type and accessibility. Ducted systems take longer because there's more to check.

Can I service my own gas heater?

You can vacuum the return air grille and clear the flue area. Anything involving the gas supply, burner, heat exchanger or flue is illegal for unlicensed people under SA gas fitting regulations. See our DIY vs professional guide for the legal boundaries.

How much does a gas heater service cost in Adelaide?

Typically $180–$290 depending on type and location. We break it down in full in our Adelaide gas heater service cost guide.

What if my heater hasn't been serviced in 5+ years?

Book in before you fire it up this winter. A long-overdue service will often catch one or two real issues — fix them now, cheap, rather than find out on a freezing night.