Gas Hot Water Systems
Gas storage and continuous flow hot water — repairs, servicing, replacement and installation. All gas work is carried out under gas licence L25976.
Two different systems, two different faults
“Gas hot water” covers two quite different setups, and knowing which one you have changes the conversation entirely.
A gas storage system keeps a tank of water hot, much like an electric system, but heats it with a burner underneath instead of an element inside. A continuous flow unit (also called instantaneous) holds no water at all — it fires only when you open a hot tap and heats the water as it passes through.
Storage systems tend to fail the way tanks fail: burner and ignition problems, thermocouples, valves, and eventually the tank itself. Continuous flow units are more electronic, so their faults skew towards ignition, flow sensors, water flow rate and error codes on the controller.
What we do with gas systems
Advance Hotwater repairs, services, replaces and installs both types. Gas work is carried out under gas licence L25976 alongside plumbing licence PD23831.
If you have a continuous flow unit showing an error code, note the code down before you call. It won’t give us the whole answer, but it’s a useful starting point.
Gas hot water repairs, servicing and installation
Ignition and burner faults
The unit not firing, firing intermittently, or dropping out partway through a shower. Common on both storage and continuous flow.
Continuous flow error codes
Units that lock out and display a fault code. We read the code, then check what it actually points to on that model.
Temperature problems
Water not getting hot, running too hot, or swinging between the two — which can be the unit, a tempering valve or the way the system is set up.
Replacement and new installation
Supply and installation of a replacement gas system, or a new one, under gas licence L25976 and plumbing licence PD23831.
What usually goes wrong
These are the symptoms we hear about most often. A good starting point for the call.
- No hot water from a gas system
- Unit not igniting or igniting intermittently
- Hot water goes cold partway through a shower
- Error code showing on a continuous flow unit
- Water only lukewarm no matter the setting
- Leaking from the unit or its connections
- Pilot light won’t stay lit on an older system
- Noisy operation or unusual smells
Please don’t troubleshoot it yourself. Hot water systems combine electricity, gas, stored pressure and water hot enough to scald. If something looks, smells or sounds wrong, turn it off if it’s safe to do so and call (07) 3801 2155.
If you can smell gas, stop and act on it
Don’t use switches or naked flames. If it’s safe to do so, turn the gas off at the meter or bottle, open up the area to fresh air, and get everyone out. Contact your gas supplier’s emergency line or emergency services first — then call us about the system itself once the immediate situation is dealt with.
Gas work is licensed work. Once the immediate situation is handled, call (07) 3801 2155 and we’ll look at the system.
Common questions
Do you work on continuous flow (instantaneous) gas systems?
My gas hot water goes cold halfway through a shower. Why?
Are you licensed for gas work?
Can I switch from gas to electric or a heat pump?
What should I have ready before I call about a gas system?
Related services
Gas hot water not behaving?
Have the brand and any error code handy and give us a call.
Prefer to text or call a mobile? 0400 703 001