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Quick Answer

A gas ducted heating service in Melbourne typically costs $150–$350, depending on the system age, number of zones, and whether the technician discovers faults. Most HVAC companies recommend servicing annually before winter — typically in April or May — to avoid call-out fees during peak season and to keep your warranty valid.

Complete Cost Breakdown

Standard Service Costs (2026)

Service Type Cost Range What’s Included
Basic annual service $150‑$220 Filter clean, flue check, heat exchanger inspection, gas pressure test
Standard service + zone motor check $220‑$280 All basic items plus zone damper motor testing (multi-zone systems)
Full system service + report $280$350 Comprehensive report, carbon monoxide test, thermostat calibration
Emergency/peak-season call-out surcharge $60$120 extra Additional fee if booked during June–August peak
Filter replacement (aftermarket) $25$80 Replacement media filter if standard cleaning is insufficient
Pro tip: Book your service in April or early May — before the June rush. Many Melbourne HVAC companies offer 1015% discounts for pre-winter bookings, and you avoid the risk of your heater failing on the first cold night.

Common Repair Costs Found During Servicing

Repair Cost Range Notes
Zone motor/damper replacement $180–$350 per zone Common failure on systems over 8 years old
Thermostat replacement( 3ƒ27—7FV×2–âÆö6F–öç2F†BvW&RæWfW”FW6–væVBf÷”V7’6W’f–6R66W72ãÂ÷ࠣƃ3ãRâv†WF†W”fVÇG2&Rf÷VæCÂöƒ3à£Çä6W’f–6RF†B&WfVÇ2æòfVÇG26÷7G2F†R&6R&FRâ–bF†RFV6†æ–6–âF—66÷fW’2fVty zone motor, cracked flue or failing heat exchanger, repair costs are quoted separately and can significantly increase the total bill.

DIY vs Professional Service

Unlike split systems where a homeowner can safely clean filters, ducted gas heaters involve a gas appliance and must be serviced by a licensed gas fitter (also called a Type B gasfitter in Victoria). Under Victorian regulations, you cannot legally carry out your own gas appliance maintenance.

What you can do yourself:

  • Clean or replace the return air filter every 3–6 months (snap-off grille, no tools required)
  • Clear debris around external flue outlets
  • Check that all supply vents are open and unblocked
  • Test your thermostat by stepping through all zone settings before the service visit
Safety warning: Never attempt to inspect, clean or repair the heat exchanger, burner, gas valve or flue yourself. A cracked heat exchanger can leak carbon monoxide — an odourless, colourless gas that is fatal in enclosed spaces. All gas appliance work in Victoria requires a licensed gasfitter under the Gas Safety Act 1997.

Signs Your Ducted Heater Needs Servicing (Not Just a Service Visit)

Problem Likely Cause Action
Heater won’t ignite or keeps cutting out Dirty burner, faulty igniter or gas valve issue Book a service — don’t attempt to reset repeatedly
Some rooms stay cold despite thermostat being on Blocked duct, failed zone damper or closed vent Check vents first; if open, book service
Unusual smell when heating runs Dust burn-off (normal first use) or flue issue (serious) Ventilate room; if smell persists after 30 mins, call immediately
Gas bill significantly higher than last year Dirty heat exchanger, failing zone motors running constantly Book efficiency service + request pressure test
Yellow or orange flame visible (gas appliances only) Incomplete combustion — carbon monoxide risk Switch off immediately, call licensed gasfitter, ventilate

Top 10 Tips and Gotchas

  1. Book before May. HVAC companies get booked solid from June. Booking in April almost always gets you a cheaper rate and a wider choice of appointment times.
  2. Ask for a carbon monoxide test. Not all standard service packages include a CO test. Request it explicitly — it adds $30–$60 but can save your life.
  3. Replace your filter yourself every 6 months. A $15–$30 DIY filter change between annual services extends heater life and reduces the technician’s time (which saves money).
  4. Check your warranty. Most Brivis, Rinnai and Daikin warranties require annual professional servicing to remain valid. Skipping a service could void your warranty claim on an expensive repair.
  5. Get multiple quotes for repairs over $400. Labour rates vary significantly across Melbourne. A heat exchanger replacement quoted at $1,200 by one company may be $750 from another.
  6. Don’t ignore zone problems. A failed zone damper motor that leaves a zone permanently open wastes gas — a $250 repair now can save hundreds in gas bills over winter.
  7. Ask about system age. If your system is over 15 years old, ask the technician directly: “Is this worth repairing or should I budget for replacement?” Get an honest answer before spending on multiple repairs.
  8. Check Energy Safe Victoria registration. All gasfitters servicing your system must be registered with Energy Safe Victoria. You can check registration at esv.vic.gov.au.
  9. Keep service records. Maintain a folder with all service invoices. This helps with warranty claims, insurance, and when you sell the property.
  10. Consider a service contract. Some Melbourne HVAC companies offer annual maintenance contracts covering both heating and cooling for $300–$500/year — often cheaper than two separate visits.
Safety warning: If your heater produces a persistent smell of gas, leave the house immediately, do not operate any switches or open flames, and call your gas distributor emergency line (AusNet Services: 13 67 07 or Multinet Gas: 13 21 67) from outside the building.

Local Melbourne Resources

Frequently Asked Questions

How often should I service my ducted gas heater in Melbourne?

Once per year is the standard recommendation — ideally in April or early May before peak winter demand. High-use households, homes with pets, or systems over 10 years old may benefit from a service every 12 months without fail, while newer low-use systems might stretch to 18 months between services without voiding the warranty (check your specific warranty terms).

Can I service my own ducted heater to save money?

You can clean or replace the return air filter yourself — this is the only maintenance task a homeowner can legally perform on a gas ducted system in Victoria. All other service tasks, including any work on the burner, heat exchanger, gas valve, flue or ignition system, must be carried out by a licensed gasfitter under the Gas Safety Act 1997.

What is checked during a standard ducted heater service?

A standard service typically includes: cleaning or replacing the return air filter, inspecting and cleaning the heat exchanger, checking the flue for blockages or cracks, testing gas pressure at the valve, checking ignition and burner operation, testing thermostat calibration, and inspecting zone damper motors (on zoned systems). A carbon monoxide test may or may not be included — ask specifically.

Why is my ducted heater not heating some rooms evenly?

Uneven heating is usually caused by one of four things: a closed or blocked supply vent in the cold room, a failed zone damper motor that is holding the duct closed, a disconnected or collapsed flexible duct in the ceiling cavity, or a return air path that is blocked (e.g., furniture pushed against the return air grille). Check all vents and grilles first; if that doesn’t fix it, a tech nician will need to inspect the duct run.

Is it worth servicing a ducted heater that is 15+ years old?

It depends on the fault history. A 15-year-old system in good condition with no recent repairs is worth servicing for another 2–3 seasons. But if the technician finds a cracked heat exchanger or failing control board on a 15-year-old unit, the repair cost (often $600–$1,200) may be better invested in a new system. Ask your technician to give you a frank 5-year cost projection before committing to expensive repairs.

What brands of ducted gas heater are most common in Melbourne?

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