10 Common Appliance Mistakes That Could Be Increasing Your Energy Bills

Your kitchen appliances work hard every day, but a few common habits can make them use more electricity than necessary. Some fixes cost nothing; others reveal a fault worth investigating. Here are ten practical checks from GS Appliance Ltd, helping households across Colchester, Ipswich, Chelmsford and the surrounding Essex and Suffolk areas.

1. Washing everything at 60°C

Heating water is a major part of a washing machine’s energy use. For everyday lightly soiled laundry, a 30°C programme may be enough when the garment label and detergent allow it. Follow higher-temperature guidance for hygiene-sensitive items and your machine’s maintenance cycle.

2. Running half-empty washing machines

Multiple small washes can use more energy and water than fewer sensibly filled loads. Aim for the load size recommended for your chosen programme. Do not pack the drum tightly: overloaded machines may clean or rinse poorly.

3. Assuming the quickest dishwasher cycle is the cheapest

Eco programmes often take longer because they heat water more gradually and typically use less energy and water. Scrape food into the bin, load dishes so spray arms can rotate, and use the eco setting for normal loads. Consult your model’s handbook because the fastest programme is not always the most efficient.

4. Ignoring dirty dishwasher filters and spray arms

Food debris can restrict drainage or spray performance, leaving dishes dirty and prompting repeat washes. Clean accessible filters and check spray-arm holes as instructed by the manufacturer. If water remains in the base, you hear unusual pump noises or a fault code appears, arrange a diagnosis rather than repeatedly restarting it.

5. Letting a tumble dryer struggle for airflow

A blocked lint filter, condenser or heat exchanger can extend drying times. Clean only the parts your manufacturer specifies, after switching off and letting the dryer cool. Check that the load is suitable for the programme and avoid over-drying. Persistently long cycles, overheating smells or error lights need professional attention.

6. Setting your fridge or freezer colder than necessary

A domestic fridge generally works best around 3–5°C, with the freezer around −18°C. Use a suitable appliance thermometer to check actual temperatures rather than assuming the dial number is a temperature reading. Settings colder than needed can increase running costs; a fridge that stays too warm also puts food at risk.

7. Overlooking damaged door seals or ice build-up

A split or poorly sealing fridge-freezer gasket lets warm, moist air enter and makes the cooling system work harder. Look for gaps, condensation, persistent frost and doors that do not close correctly. Clean seals gently and check nothing obstructs the door. Unusual icing or temperature fluctuations can also indicate another fault, so avoid guessing the cause.

8. Blocking ventilation around appliances

Fridges, freezers, tumble dryers and built-in appliances need the clearances specified by their manufacturers. Restricted airflow can reduce performance and, in some cases, create overheating hazards. Avoid pushing a freestanding appliance hard against a wall or blocking its vents. Disconnect the appliance before any user-permitted cleaning.

9. Heating a large oven for a small portion

For smaller meals, a microwave or suitable air fryer can use less energy than heating a full-size oven. An oven remains useful for cooking several dishes at once. Keep the door shut where possible, and replace failed seals or investigate faulty thermostats rather than allowing heat to escape. Choose methods appropriate to the food and follow safe cooking temperatures.

10. Boiling more water than you need

Filling a kettle to the top for one cup wastes energy heating water that may go unused. Fill only to the required level while staying above the minimum mark, and descale as instructed in hard-water areas. Energy Saving Trust estimates that avoiding an overfilled kettle could save roughly £10 a year in Great Britain, although individual savings vary.

When is an appliance using too much energy because it is faulty?

Watch for a fridge running almost constantly while temperatures remain incorrect, clothes taking noticeably longer to dry, repeated wash or dishwasher cycles, an oven failing to reach temperature, or new error codes and unusual noises. These signs justify investigation but do not identify a specific failed part on their own. Never bypass a safety device or remove covers to investigate live electrical components.

Repair or replace: which is better?

A repair can be the economical choice if the appliance is otherwise in good condition and the fault is straightforward. Replacement may make more sense when repair costs are high, parts are unavailable or the machine is very inefficient. Compare the quoted repair cost with the price, suitability and expected running costs of a replacement; do not replace a working appliance solely because a new energy label looks better.

Need appliance help in Essex or Suffolk?

GS Appliance Ltd provides domestic appliance fault finding, repairs, installations and oven cleaning across Colchester, Ipswich, Chelmsford, Clacton and nearby towns. If your washing machine, dishwasher, tumble dryer, fridge-freezer or oven is not performing as it should, get in touch with our team. We will help you work out whether a repair is worthwhile.

Visit https://www.gsappliance.co.uk/ or call 01206 638900 to discuss your appliance.

Sources and further reading

Energy Saving Trust, “What appliances drive up electricity bills most according to our experts” (6 October 2026): https://energysavingtrust.org.uk/top-five-energy-consuming-home-appliances

Energy Saving Trust, “How our experts save energy in the kitchen” (6 October 2026): https://energysavingtrust.org.uk/top-five-tips-save-energy-kitchen