Can Load Shedding Damage My Geyser? What Every SA Homeowner Should Know

Load shedding does more than leave you in the dark. Repeated power cuts and the voltage surge when electricity returns put real strain on your geyser, one of the most expensive appliances in your home. Here is exactly how load shedding damages geysers, and the practical steps that protect you.

How load shedding actually damages a geyser

There are two main mechanisms.

The surge. When a substation switches power back on, it can send a voltage spike of several thousand volts through the network. That spike is hard on thermostats, heating elements and the geyser's wiring. Repeated thermal cycling, heating up and cooling down with each outage, accelerates wear on these components.

Dry-firing. During water shedding or supply interruptions, the water level in the tank can drop below the heating element. The element is not designed to run while exposed to air. Doing so can cause it to short-circuit, which risks electric shock and even fire.

The insurance complication

Short-term insurers have reported a steep rise in power-surge claims linked to load shedding, with one industry figure citing a 60% increase. In response, some insurers now require homeowners to have a surge protection device (SPD) installed, or they will decline surge-related claims.

Check your policy fine print now, not after a surge. If an SPD is a condition of cover and you do not have one, a damaged geyser becomes an out-of-pocket cost.

How to protect your geyser

• Switch off the geyser at the DB board before scheduled load shedding, and switch it back on once supply is restored and the tank has had time to refill.
• Install a surge arrestor. A small device fitted by a qualified electrician diverts excess voltage away from your appliances.
• Consider a geyser timer with voltage regulation, so the geyser heats during off-peak windows and is protected when power returns.
• Service every three years. A qualified plumber inspects the element, thermostat, anode and wiring, catching surge-related wear before it becomes a failure.

Frequently asked questions

Should I switch off my geyser during load shedding? Yes. Switching it off at the DB board before the outage and back on after supply returns protects it from the restoration surge and avoids dry-firing risk.

Will insurance cover a geyser damaged by a power surge? Sometimes, but a growing number of insurers require a surge protection device as a condition of cover. Verify your policy wording.

Is a surge protector worth it for a geyser? Yes. Compared with the cost of replacing a geyser and its components, a surge arrestor is inexpensive insurance.

Sources

• FAnews, Protecting your home amidst SA's water crisis
• Property24, Power surge protection or no claims
• Eskom, Load Shedding FAQ

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