Modern gas heaters do a lot of self-diagnosis and tell you exactly what's wrong with a code on the controller. The hard part is decoding it. Below are the common Braemar, Brivis, Bonaire, Vulcan, Rinnai and Pyrox codes we see in Adelaide every winter — what they actually mean, what to try, and what we charge to fix them.
Every gas heater built in the last 15 years has a control board that monitors the burner, the fan, the gas valve, the flame sensor, and the temperature limits. When something goes outside spec, the board logs the fault, shuts the unit down, and shows a code on the controller. The code maps to a specific subsystem — flame failure, overheat, fan fault, valve fault, controller comms.
The codes are brand-specific. A "1" on a Braemar means something different to a "1" on a Rinnai. Below is the cheat sheet for the brands we see most often in Adelaide. If your code isn't here, ring us and tell us the brand, model and code — we'll either know it or look it up while you're on the phone.
Mostly no. An error code with the heater in lockout is the safety system doing exactly what it should — refusing to run when something is off. The unit is sitting there cold. CO risk is essentially zero in lockout state.
Stop and call us if: the controller is showing an overheat code that comes back within minutes of every reset (the heat exchanger may be damaged), or you can smell gas around the unit (call 1800 427 532 first, then us).
Take a photo of the controller. We need brand, model, and the exact code (number or letters).
Switch the unit's isolator OFF for 60 seconds, then back ON. One attempt only.
If the code is overheat-related (E2 etc), replace the return-air filter. Often fixes it on its own.
You can do one reset attempt and a filter replacement. That's it. Anything past those needs a licensed gas fitter under SA's Plumbing, Gas and Electrical Services Act 1995 — including pulling the front cover off to look inside.
What you should not do: keep cycling the isolator switch in the hope the error clears. Repeated forced resets damage the ignition system and can mask a serious fault. One reset, then wait — if the code returns, call us.
2026 Adelaide pricing, GST included, no call-out fee. Diagnostic is included in the repair price.
We always quote the total before starting. If we find the cause is heat exchanger damage from long-term neglect, we'll tell you straight whether repair makes sense.
Same day across Adelaide metro if you ring before 10am. Have the brand and code ready when you ring — we'll usually know exactly what part to bring on the truck. Most repair jobs are done in a single 60–90 minute visit.
Short cycling without a code — same root causes as E1/E2.
Fan running, no warm air. Read this if your error code is filter-related.
For ignition / E1 codes — start here.
Same-day Adelaide metro. Brand and code ready when you ring — we'll bring the right parts. Upfront quote.