Gas heater repairs in Melbourne: what to do before booking

Safety comes before troubleshooting

If you smell gas, do not try to restart the heater. Energy Safe Victoria says to turn off gas at the meter or cylinder only if safe, avoid flames and electrical switches, ventilate the area and keep people away. Call the emergency number on your gas bill from a safe place. Call 000 for a fire or immediate danger.

Carbon monoxide cannot be seen or smelled. Headache, dizziness, nausea or confusion around a gas heater can be warning signs. Stop using the heater, get everyone into fresh air and seek urgent medical help. Do not use the appliance again until a qualified gasfitter has assessed it. See routine gas heater servicing for prevention and checks.

Which problem are you seeing?

You do not need to diagnose the fault yourself. Tell the gasfitter exactly what happens and when. They can determine whether a safe service, a repair or replacement is appropriate.

• Heater will not start: note whether the controller displays an error code and whether the unit ever begins heating
• Heater runs but rooms stay cold: say whether it affects every room or just one; for central heating see ducted gas heating
• Heater stops intermittently: write down how long it runs and whether there is an error message
• Unusual noises, soot, scorching, discolouration or a change in flame: stop use and ask for a safety assessment
• No hot water rather than no space heating: use the separate hot water repairs guide

Who can inspect and repair it?

Domestic gas appliance servicing calls for a registered or licensed gasfitter with the right Type A Gas Appliances Servicing endorsement. Ask who will actually attend, check the class or endorsement on their practitioner record, and ask about training for carbon monoxide spillage testing.

Energy Safe Victoria recommends servicing gas heaters at least every two years. A proper assessment of a faulty appliance can include checking its installation, flue, ventilation, combustion and carbon monoxide spillage. Do not remove covers or attempt internal gas repairs yourself. See how to check a tradie's licence.

What does a gas heater repair cost?

There is no single reliable price for a gas heater repair: diagnosis, access, replacement parts, appliance model and whether a return visit is needed can all change the total. A cheap advertised call-out fee is not necessarily the final cost.

Ask whether the first visit includes testing and diagnosis; whether the call-out or diagnostic fee is deducted from the repair; the cost and availability of parts; any after-hours surcharge; and whether another visit is needed. Ask for separate written prices for repair and replacement before authorising expensive work. Compare the scope, not only the total: how to compare quotes.

Repair, routine service or replacement?

A routine service is preventative maintenance. A repair is for an actual defect or breakdown. A service visit may uncover a fault, but that does not automatically mean the quoted service price covers replacement parts or labour.

If the appliance is older, repeatedly fails or has an expensive part on backorder, ask about the remaining expected useful life and the cost of an efficient electric alternative. For a rental, there are specific future replacement standards: see Victorian rental energy rules.

Renting in Victoria?

A breakdown of heating provided with a rental can be an urgent repair. Tell the rental provider or agent immediately and confirm the request in writing; rental repair rules explain what to do if they do not respond.

Since 13 October 2026, the requirement for rental-provider gas and electrical safety checks every two years applies to all Victorian rentals, including existing agreements. A rental gas safety check is a formal record, not simply an assurance that a heater appears to run. The rental provider should arrange the appropriate qualified practitioner.

Example of a useful repair brief

"Ducted gas heater in a single-storey home in Clayton. Controller shows an error code after 10 minutes and there is no warm air from the vents. Brand and model are in the photo; service date is unknown. Please quote diagnosis, ask before replacing parts, and provide a service or repair record. No gas smell reported."

Include your actual suburb and observations; do not copy the example as though the details apply to your home.

Before you request a quote

• Stop using a heater that may be unsafe; gas smell or suspected CO is an emergency, not a normal quote request
• Photograph the model label and error code only if safely accessible
• Describe when the problem started, whether there is heat, and any recent service
• Check the attending gasfitter's appropriate registration or licence and Type A endorsement
• Ask which fees cover diagnosis, parts, follow-up visits and a written report

Have the details ready? Prepare a plumbing and gasfitting job request, or use the job-brief builder. This guide does not confirm a tradesperson's availability; check credentials before booking.

Related: routine gas heater servicing, ducted gas heating and checking a licence.