If your AEG tumble dryer runs but fails to produce heat, you are not alone. This is one of the most frequent complaints reported to repair services across Spain, from Barcelona to Madrid. A dryer that tumbles without heat leaves clothes damp and wastes time. Before you call a technician, there are several components you can inspect yourself, provided you follow basic safety precautions. This guide walks you through the most common reasons an AEG dryer stops heating, from simple resets to part replacements. Always unplug the dryer before any inspection.

1. Safety First: Unplug and Prepare

Before you begin any troubleshooting, disconnect the dryer from the mains. AEG dryers typically operate on 230 V in Spain, and even when turned off, internal capacitors can hold a charge. Wear insulated gloves if you plan to access internal parts. Have a multimeter ready to test for continuity. You may also need a Torx screwdriver (often T20 or T25) to open the rear or top panel, depending on your model.

2. Check the Thermal Fuse (Safety Thermostat)

The thermal fuse is a one-time safety device that blows if the dryer overheats. It is usually located on the blower housing or near the heating element. When it blows, the dryer will not heat, but the drum may still turn. To test:

  • Locate the thermal fuse (often a small white or black plastic component with two wires).
  • Set your multimeter to continuity (Ω).
  • Touch the probes to the two terminals. If the meter shows no continuity (infinite resistance), the fuse is blown and must be replaced.

Replacement thermal fuses for AEG dryers typically cost between €8 and €15 at Spanish appliance parts shops like Recambios AEG or online at Amazon.es. Important: A blown thermal fuse indicates a previous overheating event. Address the root cause (e.g., clogged vent) before replacing, or the new fuse will blow again.

3. Inspect the Heating Element

The heating element is a coil that heats up when electricity passes through it. Over time, it can burn out or develop a break. To check:

  1. Access the heating element, usually behind the rear panel or inside the bottom front, depending on your AEG model (e.g., AEG T7DBE48S, AEG T8DEE48S).
  2. Disconnect the wires and use a multimeter to measure resistance across the element terminals. A typical reading is 20–50 Ω. If you get infinite resistance, the element is open and needs replacement.
  3. Also visually inspect for any signs of burning or breakage.

A new heating element for AEG dryers costs roughly €35–€60. You can find them at authorized AEG repair centers in Spain or online stores like ElectroRepuestos.es.

4. Test the Thermostats (Operating and Safety)

AEG dryers have multiple thermostats that regulate temperature. There are two main types:

  • Operating thermostat: Cycles the heating element on and off to maintain temperature.
  • Safety thermostat (manual reset): Trips if the dryer gets too hot; it can be reset by pressing a button.

To test, locate each thermostat (usually near the heating element or blower). With the multimeter on continuity, the operating thermostat should show continuity at room temperature. The safety thermostat may also show continuity if not tripped. If either shows no continuity, replace it. Manual reset thermostats have a small button in the center; press it firmly to reset. If it trips again immediately, there is a ventilation problem.

5. Examine the Cycling Thermostat and Overheat Protection

Some AEG models include a cycling thermostat that controls the heating cycle. If it fails in the open position, the dryer will not heat. Testing is similar: check continuity at room temperature. Also, some models have a separate overheat protection device (e.g., a thermal cut-out) that must be manually reset. Refer to your model's error code list – for example, error codes like E41 or E42 often point to temperature sensor issues.

6. Check the Timer and Electronic Control Board

If all components test fine, the problem may lie in the timer or electronic control board. This is less common but possible. Symptoms include the dryer running but never entering the heat cycle, or intermittent heating. Unfortunately, testing the control board requires advanced electronics knowledge. In such cases, it is often more cost-effective to call a professional. However, you can try a simple reset: unplug the dryer for 10 minutes, then plug it back in. This can clear minor electronic glitches.

7. Inspect the Ventilation and Lint Filter

Poor airflow is a leading cause of heating problems. A clogged lint filter or blocked vent hose can cause the dryer to overheat and trip the thermal fuse. Even if the fuse hasn't blown, restricted airflow can prevent the heating element from working efficiently. Clean the lint filter after every load. Also, disconnect the vent hose and check for lint buildup. A blocked vent can also trigger error codes like E11 or E15 on some AEG models. For more on error codes, see our guide on AEG dryer error codes.

8. Door Switch and Start Mechanism

If the door switch is faulty, the dryer may not start the heating cycle. Symptoms: the drum turns but no heat, or the dryer stops immediately when you release the start button. Test the door switch with a multimeter – it should show continuity when the door is closed. Replacement switches cost around €10–€20 and are easy to install. Also check the start switch for continuity. For related issues, you might find our article on AEG washing machine error codes useful, as some dryer error codes overlap.

9. When to Call a Professional

If you've checked all the above and your AEG dryer still doesn't heat, it's time to call an authorized technician. In Spain, AEG recommends contacting their official service network. Average repair costs for heating issues range from €80 to €150 for a call-out plus parts. Attempting complex repairs without proper training can void your warranty or cause further damage. For more comprehensive advice, see our complete guide to AEG appliance repair in Spain.

10. Preventive Maintenance Tips

To avoid future heating problems:

  • Clean the lint filter after every cycle.
  • Inspect and clean the vent hose at least twice a year.
  • Do not overload the dryer – this strains the heating system.
  • Use the correct drying programs for different fabrics.
  • Consider annual professional maintenance, especially if your dryer is over 5 years old.

These simple steps can extend the life of your AEG dryer and reduce the risk of heating failures. For more on maintaining your AEG appliances, read our article on how to fix AEG washing machine not spinning – while it's about washing machines, many maintenance principles apply to dryers as well.

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