Signs Your Geyser Is Failing

A geyser rarely fails without warning. Changes in hot-water temperature, pressure, recovery time, noise, leaks or electrical behaviour can all indicate that a component is deteriorating. Acting early can prevent a small fault from becoming water damage, an electrical hazard or a complete loss of hot water.

Before you worry

One unusual sound or a single cold shower does not automatically mean the geyser must be replaced. First note whether the problem is constant, whether other taps are affected and whether there is visible water near the geyser or overflow pipes.

How to recognise the problem

• Hot water runs out much faster than before.
• Water is too hot, too cold or changes temperature unexpectedly.
• The geyser makes popping, rumbling or hissing noises.
• Water appears at the drip tray, ceiling or overflow pipe.
• The electrical supply trips when the geyser heats.
• Rust-coloured water or corrosion is visible.

Common causes

• A worn element or faulty thermostat.
• Scale build-up inside the cylinder.
• A leaking pressure-control valve or vacuum breaker.
• Corrosion of the tank or fittings.
• Incorrect pressure or installation defects.
• Age-related deterioration of seals and insulation.

What you can safely check yourself

• Check whether the problem affects all hot-water outlets.
• Look for visible water without touching electrical components.
• Note whether the distribution board has tripped.
• Turn off the geyser electrical isolator if water is leaking near wiring and it is safe to do so.
• Photograph visible leaks and record the geyser age if known.

What you should never do

• Do not remove electrical covers or test live wiring.
• Do not block overflow or discharge pipes.
• Do not climb into a ceiling where water and electricity may be present.
• Do not keep resetting a tripping circuit breaker.

When to call a plumber

Call a plumber urgently if water is leaking into the ceiling, the geyser is tripping electricity, the cylinder appears corroded, or hot water is scalding. Persistent temperature or pressure problems also require professional diagnosis.

How professionals solve it

A plumber checks the cylinder, valves, pipework, drip tray and visible signs of corrosion. Electrical components are tested by a suitably qualified person. The system is then assessed for repair, component replacement or full geyser replacement, followed by pressure and leak testing.

How to prevent it happening again

• Arrange periodic inspection of valves and visible pipework.
• Repair small leaks promptly.
• Keep discharge and overflow points unobstructed.
• Use compliant pressure-control components.
• Replace ageing units before repeated failures cause major damage.

Frequently asked questions