If the fan is running but the air isn’t warm, the most likely causes are an ignition failure, a blocked or dirty burner, or a fault with the gas valve. It can also happen when the system overheats — a safety cutout shuts off the burner to protect the unit, but the fan keeps running. This is often caused by a blocked return air filter restricting airflow.

A burning dust smell at the very start of the heating season is normal and usually clears within a few minutes — it’s just dust burning off components that haven’t been used for months. However, if the smell persists, is chemical in nature, or smells like gas or rotten eggs, stop using the heater immediately, ventilate the space and call a licensed technician. A persistent smell can indicate a cracked heat exchanger or gas leak.

Flashing lights or error codes mean the heater’s safety system has detected a fault and shut the unit down. Different brands use different flash patterns — for example, Brivis uses a series of short and long flashes, while Braemar uses numbered codes on a display. While these codes point technicians in the right direction, accurate diagnosis still requires on-site testing. Simply resetting the fault without finding the cause often results in the problem returning.

Australian Standard AS 4575 recommends gas ducted heaters be serviced every two years. Annual servicing is advisable for older systems or those that have been subject to heavy use. Regular servicing catches developing faults early, ensures the system is safe, maintains efficiency and is required to keep some manufacturer warranties valid. We recommend booking before the winter season — typically April or May — while availability is still good.

This depends on the age of the system, the nature of the fault and the cost of parts. Generally, systems under 12–15 years old are worth repairing if the fault is straightforward. Older systems with recurring faults, failed heat exchangers, or where parts are no longer available may be better replaced. We take a repair-first approach and will always give you honest advice — we won’t push you toward replacement if repair is the better option for your situation.

Our diagnostic assessment includes up to 30 minutes on-site to accurately identify the fault. A full service for a functioning heater is charged at a fixed, capped price. Repair costs vary depending on the fault, with labour charged per 30 minutes and parts quoted separately. We always provide a clear, itemised quote before any repair work begins. View our full pricing page for complete details.

Yes. A cracked or deteriorated heat exchanger is the most common cause of carbon monoxide entering a home from a ducted gas heater. The heat exchanger separates combustion gases from the air circulated through your home — when it cracks, combustion byproducts including CO can enter the airstream. This is why carbon monoxide testing is included in every service we carry out, and why regular servicing matters regardless of how well the heater appears to be running.

Yes — these are among the most common gas ducted heater brands in Melbourne and our technicians have extensive experience with all three. We also service Vulcan, Bonaire, Stadt, Convair, Kaden, Omega and most other reputable brands. View our dedicated pages for Brivis, Braemar and Lennox for more information.