Keeping your appliances in perfect condition not only saves you money in the long run but also reduces environmental impact by extending their lifespan. The key is to identify and replace natural wear parts in time before they cause major breakdowns.
In this guide, we show you the 10 essential spare parts every owner should know, the signs that they need to be replaced, and how to do it preventatively.
1. Refrigerator and extractor hood filters
Why they are important: Filters keep the air clean and performance optimal. A clogged filter makes the motor work harder, consumes more energy, and reduces the appliance's lifespan.
Signs of replacement:
- Persistent odors in the refrigerator or kitchen
- Visible reduction in airflow
- Visible grease or dirt buildup
- Manufacturer recommends changing every 6-12 months
Recommended frequency: Every 6 months for heavily used extractor hoods, every 12 months for refrigerators.
👉 See refrigerator filters | See extractor hood spare parts
2. Water heater, oven, and dishwasher heating elements
Why they are important: Heating elements are the heart of the heating system. When they fail, the appliance stops heating water or reaching the necessary temperature.
Signs of replacement:
- Cold or lukewarm water instead of hot
- Oven not reaching the programmed temperature
- Dishwasher not drying properly
- Increased heating time
- Tripping of the electrical differential
Recommended frequency: 5-8 years depending on water hardness and frequency of use.
👉 See water heater heating elements | See oven spare parts
3. Washing machine and dryer belts
Why they are important: The belt transmits motion from the motor to the drum. Without it, the drum will not spin even if the motor is working.
Signs of replacement:
- Squealing noises during spinning
- Drum not spinning but motor is heard
- Visible cracks or wear on the belt
- Loss of tension (loose belt)
- Smell of burning rubber
Recommended frequency: 5-7 years or earlier if there are signs of wear.
👉 See Indesit and Ariston dryer belts | See Electrolux, AEG, Zanussi dryer belts
4. Door seals and gaskets
Why they are important: Seals ensure an airtight closure in washing machines, dishwashers, ovens, and refrigerators. A deteriorated seal causes leaks, loss of energy efficiency, and moisture damage.
Signs of replacement:
- Water leaks in washing machine or dishwasher
- Loss of cold in refrigerator (excessive frost)
- Loss of heat in oven (uneven cooking)
- Visible mold or cracks on the rubber
- Rubber hardened or brittle to the touch
Recommended frequency: 3-5 years or when signs of deterioration appear.
5. Thermostats and temperature sensors
Why they are important: They regulate temperature and prevent overheating. A faulty thermostat can cause anything from malfunction to safety risks.
Signs of replacement:
- Irregular temperature (too cold or hot)
- Appliance not shutting off automatically
- Very frequent on/off cycles
- Food frozen in the refrigerator or thawed in the freezer
- Burnt or undercooked food in the oven
Recommended frequency: 8-10 years or when temperature regulation fails.
👉 See replacement thermostats | See power regulators
6. Dryer condensers
Why they are important: In condenser dryers, the condenser recovers water from the hot air. If it's clogged, the dryer loses efficiency and consumes more energy.
Signs of replacement:
- Clothes taking much longer to dry
- Excessive humidity in the drum at the end
- Condenser cleaning indicator always on
- Lint buildup that isn't removed by cleaning
Recommended frequency: Monthly cleaning; replacement every 5-7 years if damaged.
👉 See Electrolux, AEG, Zanussi dryer condensers
7. Drain pumps
Why they are important: They drain dirty water in washing machines and dishwashers. A faulty pump leaves standing water and can cause bad odors and breakdowns.
Signs of replacement:
- Water not draining completely
- Strange noises during draining (humming, banging)
- Error code related to draining
- Smell of stagnant water
- Water leaks from the base of the appliance
Recommended frequency: 5-8 years or when draining fails.
👉 See washing machine spare parts | See dishwasher spare parts
8. Electronic modules and selectors
Why they are important: They control the appliance's functions. A faulty module can leave the appliance completely inoperative or with limited functions.
Signs of replacement:
- Display not turning on or showing constant errors
- Buttons or selectors not responding
- Programs not running correctly
- Random restarts of the appliance
- Functions stopping working without apparent reason
Recommended frequency: 8-12 years or when controls fail.
👉 See electronic modules | See oven selectors
9. Coffee maker mechanical parts (brew groups, valves, seals)
Why they are important: Coffee makers have multiple precision parts that suffer wear due to pressure, temperature, and limescale. Keeping them in good condition ensures perfect coffee.
Signs of replacement:
- Water or coffee leaks
- Loss of pressure (watery coffee)
- Abnormal noises during extraction
- Coffee with strange taste or incorrect temperature
- Visible limescale buildup
Recommended frequency: Seals every 1-2 years; valves and brew groups every 3-5 years depending on usage.
👉 See coffee maker mechanical parts | See Delonghi coffee maker descalers
10. Extractor hood motors and turbines
Why they are important: They extract smoke, vapors, and odors from the kitchen. A faulty motor reduces air quality and can be noisy.
Signs of replacement:
- Excessive noise or abnormal vibrations
- Noticeable reduction in extraction capacity
- Motor not starting or stopping by itself
- Burning smell or overheating
- High electrical consumption
Recommended frequency: 10-15 years or when performance fails.
👉 See extractor hood turbines | See electrical parts for hoods
Frequently Asked Questions About Appliance Spare Parts
When is it better to repair than to buy a new appliance?
As a general rule, if the repair cost (part + labor) is less than 50% of the price of a new appliance and your appliance is less than 8 years old, it's worth repairing. Also, consider the environmental impact: repairing is always more sustainable.
Can I change these parts myself?
Many spare parts like filters, belts, seals, and heating elements can be changed with basic tools and by following tutorials. However, for complex electrical parts or if you lack experience, it's advisable to consult a professional technician for safety.
How do I know exactly what spare part I need?
You need the exact model of your appliance (usually found on a label on the back or inside). With that code, you can search for the compatible spare part. In our store, you can filter by brand and model to find the exact part.
Are generic spare parts as good as original ones?
It depends on the generic manufacturer. Quality certified spare parts offer the same performance as original ones at a more competitive price. Always look for spare parts with warranty and safety certifications.
How often should I perform preventive maintenance?
We recommend a basic annual check: cleaning filters, inspecting seals and gaskets, descaling appliances that use water, and checking for abnormal noises or behaviors. Preventive maintenance can double the lifespan of your appliances.
What if my appliance still doesn't work after changing the part?
If the problem persists after replacing the spare part, there may be an additional fault or an incorrect diagnosis. In that case, it is advisable to contact a professional technical service for a complete review of the appliance.
Conclusion: Preventive maintenance is key
Knowing these 10 essential spare parts and when to change them will allow you to:
- ✅ Save money by avoiding major breakdowns
- ✅ Extend the lifespan of your appliances by up to 50%
- ✅ Reduce energy consumption by maintaining optimal efficiency
- ✅ Contribute to the environment by reducing electronic waste
- ✅ Avoid unexpected interruptions in your daily life
At Electrotodo.es you will find all these spare parts organized by brand, model, and appliance type. Our catalog includes original and compatible high-quality parts with a warranty.
👉 Explore all home spare parts
Do you need help identifying the spare part you need? Contact our technical team and we will advise you without obligation.
