Maintenance · Load Shedding · Protection
How Load Shedding Affects Your Air Conditioner — and How to Protect It
The moment the power comes back on is the most dangerous for your AC. Here is how to protect your system from surges, and what to do when the lights go out.
Why load shedding damages air conditioners
The biggest risk is not the outage itself — it is the surge when electricity returns. As the grid switches back on, voltage can spike well above the safe 230V level. Those spikes stress the compressor, the printed circuit board and the capacitors, which are the components most likely to fail after repeated load-shedding cycles.
A sudden cut while the compressor is running can also leave it under high pressure, and restarting too soon after an outage can cause the compressor to struggle. Over a year of regular load shedding, this adds up to premature wear and avoidable repair bills.
Three cheap ways to protect your system
1. Fit a surge protector (surge arrestor) at the isolator feeding the air conditioner. This is a small cost compared with a replacement circuit board.
2. Wait 5–10 minutes after the power returns before switching the AC back on. This lets refrigerant pressures settle and protects the compressor.
3. If your AC has a timer or delay-restart feature, set it — many modern units already include a built-in restart delay, which is one reason inverter models cope better with load shedding.
Should you run your AC during load shedding?
If you have an inverter air conditioner, it can often keep running through brief dips because its electronics tolerate voltage fluctuation better. Standard units cannot — they simply stop and restart when power returns.
For serious backup, an inverter AC paired with a decent inverter/UPS battery system can run for hours during an outage. It is an investment, but for bedrooms, home offices or medical reasons it is often the best solution.
What to do after a bad outage
If your air conditioner trips, makes unusual noises or fails to cool after load shedding, do not keep switching it on — a struggling compressor can burn out completely. Call a licensed technician to check the system, especially if you notice burning smells or a tripped breaker. A quick service after a surge event is far cheaper than a compressor replacement.
Need help with your air conditioning?
Talk to a registered technician in Gqeberha, Kariega, Despatch or Jeffreys Bay. No-obligation written quotes.