Gas control valve failure
The signature AquaMAX fault. The pilot stays lit but the burner will not fire, so the tank slowly goes cold. It is a licensed gas repair, not a homeowner fix.
Well-known gas storage and electric systems built for Australian conditions. Full repair, replacement and installation available.

AquaMAX is an Australian storage brand known for stainless steel gas and electric tanks.
Stainless models commonly carry extended cylinder warranties, subject to licensed installation and correct valve maintenance.
Gas control valves, thermostats, elements and PTR valves for common AquaMAX tanks.
AquaMAX stainless tanks commonly reach 10–15 years; the vitreous enamel range sits closer to 8–12.
Weighing up whether to fix or replace a AquaMAX unit? Read our repair or replace guide and the Hobart replacement cost guide. If you have no hot water right now, start with the no hot water troubleshooting guide or call for emergency hot water help.
Answer a couple of quick questions so we can get your hot water sorted.
Prefer to speak now? Call (03) 6292 6093
The signature AquaMAX fault. The pilot stays lit but the burner will not fire, so the tank slowly goes cold. It is a licensed gas repair, not a homeowner fix.
Outdoor G Series tanks on windward Eastern Shore and coastal Kingston blocks can lose the pilot in strong wind — a draught shield or repositioning often solves what looks like an appliance fault.
Distinctive kettling from the tank base after years of service. Flushing helps on younger units.
Scalding water at the bathroom tap. A safety fault, replaced same visit.
Because AquaMAX stainless cylinders outlast their gas controls, replacing a control valve on an otherwise sound tank is normally good value — the exception is a unit already past twelve years.
Our repair or replace guide sets out the full decision, and the Hobart replacement cost guide explains what changes the price. Symptoms are covered in common hot water problems and the hot water FAQ.
Tell us the model and the symptom — or the error code if the unit shows one — and we'll diagnose the fault properly, then explain whether repair or replacement makes more sense for your AquaMAX system before any work begins.
Servicing Hobart, Glenorchy, Moonah, New Town, Sandy Bay, Kingston, the Eastern Shore and Southern Tasmania.
Send through a quick enquiry and we'll get back to you fast to help sort your hot water.