Many homes and farms around Humansdorp use borehole or tank water. It is a reliable supply, but it can be hard on washing machines over time. Here is what hard water and sediment do, how to spot the signs and how to protect your machine.

Quick answer

Hard borehole water leaves mineral scale on washing machine heating elements and sensors, causing slow heating and eventually element failure. Sediment in borehole and tank water blocks inlet filters, causing slow filling and water supply errors. Descale every two to three months, clean the inlet filter regularly, and consider a sediment filter or water softener.

Why borehole water is different

Municipal water is treated and filtered before it reaches your taps. Borehole water comes straight from underground, where it picks up dissolved minerals from the rock. Tank water collected from roofs is soft, but often carries fine dust, leaves and sediment. Many Humansdorp homes and farms use one or the other, or switch between them.

Two things matter for your washing machine: hardness and sediment.

Hard water and scale

Hard water contains dissolved calcium and magnesium. You can usually tell if your water is hard: kettles build up white scale, shower heads clog, taps get white crusts, and soap does not lather easily.

When hard water is heated in a washing machine, some of those minerals come out of solution and stick to hot surfaces as scale.

Where scale builds up

  • On the heating element. Scale insulates the element, so it has to run hotter and longer to heat the water. Eventually it overheats and burns out.
  • On the temperature sensor. The sensor reads the wrong temperature, so washes may be too hot or too cold.
  • In the drum and tub. Scale traps detergent residue and dirt, causing smells.
  • In valves and hoses, gradually restricting flow.

Signs of scale problems

  • Washes take longer than they used to
  • Hot programmes come out lukewarm
  • White flakes on clothes or in the drum
  • Clothes feel stiff or rough
  • The machine trips the power during heating, which can be a sign of a failing element

Sediment and blocked filters

Borehole water can carry fine sand and silt, especially after heavy rain or when the pump draws from low water levels. Tank water carries dust and organic matter. Every washing machine has a small mesh filter where the inlet hose connects. It catches this sediment, and over time it blocks.

Signs of a blocked inlet filter

  • The machine takes a long time to fill
  • It stops with a water supply or fill error
  • You hear the inlet valve buzzing but little water comes in

How to clean the inlet filter

1. Switch off the machine and close the tap. 2. Unscrew the inlet hose from the back of the machine. Have a towel ready. 3. Look inside the connection on the machine. You will see a small mesh filter. 4. Gently pull it out with pliers if needed, rinse it and brush off the sediment with an old toothbrush. 5. Refit the filter and hose, open the tap and check for leaks.

On some machines there is also a filter at the tap end of the hose.

Protecting your machine

Descale regularly

Run a descaling or machine cleaning wash every two to three months. Use a product designed for washing machines and follow the instructions.

Use the right detergent

Hard water reduces the effectiveness of detergent. Use a detergent formulated for hard water, or add a water softening product. Using more ordinary detergent is not the answer, as it leaves residue.

Add a sediment filter

If your borehole water carries a lot of sand or silt, a sediment filter on the supply line protects not only the washing machine but also the dishwasher, geyser and taps.

Consider a water softener

For very hard water, a whole-house water softener reduces scale throughout the home. It is a bigger investment but extends the life of every water-using appliance.

Wash at lower temperatures

Scale forms faster at higher temperatures. Modern detergents work well at 30 to 40 degrees for most loads. Save hot washes for heavily soiled items and towels.

When to call a technician

  • The machine trips the power, especially during heating
  • Hot washes stay cold
  • The machine will not fill even after you clean the inlet filter
  • You see water leaking from the hose connection or valve

We repair heating elements, temperature sensors, inlet valves and related faults on all major brands, including top loaders common on farms.

Frequently asked questions

How do I know if my borehole water is hard?

White scale in kettles, on taps and shower heads, and soap that does not lather well are all signs. A simple water test kit gives a more accurate answer.

Can scale cause my washing machine to trip the power?

Yes. A scaled-up heating element can overheat and fail, and a failing element can cause the earth leakage to trip.

Does rainwater from a tank cause scale?

Rainwater is naturally soft, so it causes little scale, but it often carries sediment that blocks inlet filters.

Apex HVAC is an independent company and is not affiliated with or authorised by any appliance manufacturer. This guide is general advice. For anything involving electricity or refrigerant gas, use a qualified technician.

Need a hand? See our washing machine repair service in Humansdorp.