First: Don't Panic — Work Through the Basics

Before calling a plumber, consider a few quick checks that might reveal a simple fix. Has there been unusually high hot water demand today, such as more people showering, large amounts of laundry, or guests? If you have a storage system, it may just need time to reheat. Allow an hour and check again. If your system runs on gas, ensure your gas supply is working at another appliance. If it's electric, inspect your switchboard for a tripped circuit breaker or blown fuse on the hot water circuit.

Check the Pilot Light on Gas Systems

Gas storage hot water systems require a pilot light to remain lit for the burner to ignite. If the pilot light has gone out, possibly due to strong winds or a temporary gas supply interruption, the system will not heat. Most systems include relighting instructions on the unit itself. If you're uncomfortable relighting it, or if it doesn't stay lit after relighting, it's best to call a licensed gas fitter like us instead of persisting.

The Pressure Relief Valve: What That Dripping Means

A temperature and pressure relief (TPR) valve is a crucial safety feature on all storage hot water systems. It is designed to release pressure if the system overheats. If you observe water dripping from a pipe near the base of your hot water unit or from a pipe leading outside your home, the TPR valve might not be functioning. This could indicate that the system is overheating or that the valve itself is worn and leaking. In either case, this situation requires a plumber's attention and should not be attempted as a DIY fix.

Signs the System Has Failed and Needs Replacement

Not every hot water problem means a new system. But some signs point clearly to replacement rather than repair:

Leaking from the tank itself?

If water is coming from a valve or fitting, that can usually be repaired. If it's leaking from the tank body — the metal cylinder itself — the tank has corroded from the inside and cannot be fixed. Once a tank fails like this, replacement is the only option.

Rusty or discoloured water?

Persistent rust-coloured hot water, especially when the cold water runs clear, often means the tank is corroding internally. By the time it shows up in the water, the tank is usually close to failing altogether.

Old age and breakdowns?

Most hot water systems last between 10 and 12 years, depending on factors like type, brand, and installation quality. A system that wasn't properly sized or installed may never have performed optimally. Manufacturer warranties typically cover 10 to 12 years, contingent on regular maintenance and part replacements. Neglecting these can void the warranty before the system fails. If your unit is within this age range and has stopped working, repairs are often not cost-effective. You'd be investing in a system that's out of warranty, already underperforming, or nearing the end of its lifespan.

Frequent repairs?

‍If your unit has required multiple repairs in a short time, it's likely that the entire system is deteriorating, not just experiencing isolated issues. This can also be a cause from other factors like chemicals in water that deteriorate hot water systems are mainly driven by acidity (low pH), dissolved minerals (calcium and magnesium) causing hard water, and aggressive disinfectants like chlorine or chloramines. Solution could be installing a whole house water filter.

If you're uncertain about your system's condition, we can assess it and provide a clear recommendation on whether repair or replacement is more appropriate, avoiding unnecessary expenses on temporary fixes.

Emergency Hot Water Replacement on the Sunshine Coast

At Allied Plumbing, we handle hot water emergencies quickly throughout the Sunshine Coast and Noosa. We have a variety of systems on hand, allowing us to often replace faulty units the same day, minimizing any inconvenience. Plus, we provide expert guidance on upgrading to more efficient systems, so you can avoid ongoing inefficiencies and extra costs.

Call Allied Plumbing Now

If your hot water system has stopped working, don't endure the inconvenience. Contact Allied Plumbing at 0428 411 487 — we're available around the clock for plumbing emergencies. Alternatively, visit alliedqld.com.au to submit an inquiry, and we'll respond promptly.