Quick Answer
A gas heater service in Melbourne costs $150–$350 depending on the system type and what’s found during the inspection. Ducted gas heating services run $180–$350, while wall furnace and space heater services cost $150–$250. Annual servicing is recommended — not just for efficiency, but because faulty gas heaters are the leading cause of carbon monoxide poisoning in Victorian homes, particularly in the outer south-eastern suburbs where many homes rely heavily on ducted gas for winter heating.
Gas Heater Service Cost Breakdown
By System Type
| System Type | Service Cost | What’s Included |
|---|---|---|
| Ducted gas heating (add-on unit) | $180–$350 | Filter clean, burner check, flue inspection, CO test, heat exchanger inspection |
| Wall furnace (Pyrox, Brivis, Rinnai) | $150–$250 | Burner clean, pilot check, flue draft test, CO check, safety valve test |
| Unflued gas heater (portable) | $100–$180 | Burner clean, oxygen depletion sensor test, ignition check |
| Gas log fire (decorative) | $150–$280 | Pilot clean, burner ports, glass inspection, flue check |
| Ducted heating + cooling combo | $220–$400 | Full heating service plus basic cooling check |
Additional Costs During Service
| Additional Work | Cost | When Required |
|---|---|---|
| Filter replacement (ducted heating) | $20–$60 | When filter clogged; often included in service |
| Thermocouple replacement | $80–$150 | Pilot won’t stay lit; common in older wall furnaces |
| Duct cleaning (per duct) | $50–$120 | Recommended every 3–5 years; reduces allergens |
| Flue relining or repair | $300–$1,200 | Cracked or blocked flue; serious safety issue |
| Heat exchanger replacement | $400–$1,500 | Cracked exchanger; CO leak — unit may need replacement |
What Affects Gas Heater Service Costs?
1. System Age and Condition
A well-maintained system under 10 years old takes 45–90 minutes to service. An older system (10–20 years) in poor condition may require 2–3 hours and additional parts, pushing costs toward the top of the range. In older Dandenong, Springvale, and Noble Park homes, wall furnaces from the 1990s are still common and typically need more work at each service.
2. When It Was Last Serviced
A heater never serviced in 5–10 years will accumulate dust in the burner, corroded components, and potentially degraded seals. First-time services on neglected systems often cost $250–$400 as the technician spends more time cleaning and checking each component. Annual servicing keeps costs at the standard rate.
3. Duct Condition
Ducted heating systems with dirty, partially blocked, or pest-damaged ducts require additional work beyond the standard service. In homes in Pakenham, Officer, and Cranbourne — where mice and rats find roof spaces attractive — duct damage is a common finding. Expect $50–$120 per duct for cleaning if required.
Signs Your Gas Heater Needs Servicing
| Problem | Symptom | Action |
|---|---|---|
| Yellow or orange burner flame | Visible through heater inspection glass | Turn off immediately; call a licensed gasfitter — potential CO risk |
| Pilot won’t stay lit | Heater cuts out; pilot relights but won’t hold | Thermocouple likely failed; service required |
| Unusual smell when running | Burning dust (normal first use of season); persistent acrid smell (not normal) | Dust smell: let run 10 min. Acrid/eggy smell: turn off, ventilate, call gasfitter |
| Reduced heat output | Rooms not reaching set temperature; long run times | Filter blocked or burner dirty; service required |
| Heater over 15 years old and unserviced | No obvious fault but no recent inspection | Immediate service recommended for safety and efficiency |
Top 10 Tips and Gotchas
- Service annually, not “when it breaks.” A cracked heat exchanger shows no obvious fault until CO levels build — annual inspection is the only reliable way to catch this before it becomes a health emergency.
- Install a CO alarm regardless. Even if your heater was serviced last month, CO alarms are a $40–$80 backstop that can save lives. Mount them at mid-height on the wall, not the ceiling.
- Use a licensed gasfitter. All gas appliance work in Victoria — including servicing — must be done by a licensed gasfitter. Check licences at vba.vic.gov.au. Using an unlicensed person is illegal and voids your home insurance.
- Don’t use unflued heaters in bedrooms. Unflued gas heaters (the portable LPG or natural gas type) should never be used in bedrooms or small, closed rooms — they consume oxygen and can cause CO buildup. They are banned in bedrooms in most Australian states.
- Check the age of your ducted system. Most ducted gas heating systems have a lifespan of 15–20 years. If yours is approaching this age, ask the technician whether repair or replacement makes more economic sense.
- Clean or replace filters before winter. A blocked filter forces the system to work harder, reduces efficiency, and can cause the heat exchanger to overheat. Most ducted system filters can be removed and vacuumed by the homeowner monthly.
- Compare service contracts vs one-off callouts. Some HVAC companies offer annual service plans ($180–$260/year) that include a service plus priority response if it breaks down mid-winter. For older systems, this can be worthwhile.
- Check if your gas meter is in good condition. While the gasfitter is there, ask them to check your gas meter and flexible connectors. Flexible connectors on appliances should be replaced every 5 years as they harden and can crack.
- Ducted system not heating evenly? Check zone dampers. Motorised zone dampers in ducted systems can stick open or closed, causing some rooms to be over-heated while others stay cold. This is a quick fix during a service call.
- Book a replacement now if the system is 20+ years old. New ducted gas systems are significantly more efficient (5–6 star vs 2–3 star older units). A replacement may cost $3,500–$8,000 but will pay back in lower gas bills within 5–8 years.
Local Melbourne Resources
- Victorian Building Authority — Gasfitter Licence Check — Always verify your gas technician is licensed before they work on your system
- Energy Safe Victoria — Gas Appliance Servicing — Regulatory guidance on servicing requirements and CO safety
- Bunnings — Carbon Monoxide Alarms — CO detector range from $40–$80; essential for all gas-heated homes
- Gasman — Melbourne Gas Heating Specialists — Local Melbourne company covering SE suburbs including Dandenong, Frankston, and Berwick
Frequently Asked Questions
How often should a gas heater be serviced in Melbourne?
Gas heaters should be serviced every 1–2 years at minimum, with annual servicing recommended for ducted systems and any heater in a home with elderly residents, young children, or anyone with respiratory conditions. Energy Safe Victoria recommends annual servicing for all gas heating appliances due to the CO risk from degrading heat exchangers.
Is it illegal to service your own gas heater in Victoria?
Yes — all gas appliance servicing in Victoria must be carried out by a person licensed as a Type A gasfitter. Homeowners can clean external filters and vents, but any work on burners, flues, gas valves, or internal components requires a licensed tradesperson. Working on gas appliances without a licence is illegal and voids home insurance.
What is the lifespan of a ducted gas heater in Melbourne?
Most ducted gas heaters (Brivis, Bonaire, Braemar, Rinnai) are designed to last 15–20 years with regular servicing. In Melbourne’s outer south-eastern suburbs where systems run hard through long winters, well-maintained systems regularly reach 18–20 years. Without servicing, lifespan drops to 10–12 years and safety risks increase significantly.
Why does my gas heater smell like burning dust when I first turn it on?
A brief burning dust smell when you first turn the heater on at the start of winter is normal — dust accumulates on the heat exchanger over summer and burns off in the first few minutes of operation. Open windows briefly to ventilate. If the smell persists beyond 15–20 minutes, or smells acrid, chemical, or like eggs (sulphur), turn the system off and call a licensed gasfitter.
Can I service my own ducted heating filter?
Yes — cleaning or replacing the return air filter in a ducted heating system is a homeowner task and should be done monthly during the heating season. The filter is usually located in the return air grille (a large louvred grille typically in the hallway ceiling). Remove it, vacuum or wash the filter, and reinstall. This doesn’t replace the annual professional service but keeps the system running efficiently between visits.
Final Thoughts
Gas heater servicing is a non-negotiable annual task in Melbourne homes — not just for efficiency, but for the safety of everyone in the house. Carbon monoxide from a failing heat exchanger is invisible and odourless, and the symptoms are easily confused with winter illness. Book your service in April before the winter rush, install a CO alarm regardless, and replace any system over 20 years old with a modern high-efficiency unit. The cost of a service is trivial compared to the consequences of skipping it.