Repair or replace an electric hot water system?

Cold water doesn't always mean a dead tank. Check the switchboard for a tripped hot water breaker or safety switch, and the isolating switch near the tank. If the tank runs on an off-peak circuit, a timer or meter change may have stopped it heating. Those are quick to rule out.

If the power is on and the water stays cold or lukewarm, the element or thermostat has usually failed. A failing element often leaks current to earth as it heats, which is why the safety switch trips when the hot water comes on. Reset it once. If it trips again, leave it off and have the tank and circuit tested.

A tank that's relatively young, dry underneath and showing no rust is usually worth repairing. Replacing an element or thermostat is a contained job, the parts are common, and the tank goes back to doing what it did before. Our electricians test the element, thermostat, circuit and safety switch, and a licensed electrician must provide a Certificate of Electrical Safety for the work.

It's also a good moment to check the circuit's protection. Energy Safe Victoria guidance says the Wiring Rules require safety switch protection on every final sub-circuit in a home, the hot water circuit included. An older board where the hot water has none is worth sorting while the tank is being repaired.

A leak from the cylinder itself can't be repaired, and rust streaks, a wet base or a corroded jacket usually mean the inside is heading the same way. On an older tank, even a simple element repair is a closer call: you might pay for a repair now and a replacement soon after.

Leaks from fittings, and a relief valve that drips all day, are different. Those are plumbing repairs for a licensed plumber and don't by themselves condemn the tank.

A like-for-like element tank is the simplest swap. It can usually reuse the existing circuit once it's tested, can stay on an off-peak tariff, and suits homes with nowhere for a heat pump to breathe, such as a tank in an internal cupboard.

A heat pump costs more up front but uses much less electricity to heat the same water. It needs open airflow outside, a drain for condensation and often a change to how the circuit is switched, because it works best in the warmer middle of the day rather than overnight. With solar panels, a daytime timer lets it run on your own power.

If the property is a rental, check the 2027 rules before choosing. From 1 March 2027, when a rental's hot water system permanently fails and can't be repaired, the rental provider must replace it with an energy-efficient electric hot water system.

Most hot water replacements happen in a rush after the old tank fails, which leaves little time to compare options or choose a better spot. If your tank is showing its age, looking at it now lets you decide calmly: we check the circuit and switchboard, and a licensed plumber looks at the water side and the site.

Photograph the tank's label before you call. The brand, model, capacity and manufacture date are usually printed on it. That, with a note of what has happened, lets whoever comes out bring the right parts for a repair or price a replacement properly.