What Fan Runs Constantly means on your Asko microwave (asko microwave fan runs constantly)
A built-in Asko microwave, like the oven, runs a cooling fan to protect its electronics, and some fan noise after a cycle is completely normal. An asko microwave fan runs constantly becomes a genuine symptom when it never stops, including long after the unit was last used and with the cabinet clearly cool, which points to the thermal switch or relay responsible for ending the fan cycle rather than to the fan motor itself.
Symptoms
The signs collected here distinguish this problem on your Asko microwave from other conditions that can look the same. Your microwave might show them individually or in a cluster, appearing gradually or suddenly after an outage, a spill onto the controls, or recent service work.
- the fan runs continuously, including hours after the unit was last used
- the unit and surrounding cabinet feel cool to the touch while the fan is still audible
- the fan may run even when the unit has not been used at all that day
- fan noise or pitch may change over the extended run time
- no error message or display change typically accompanies this symptom
Common causes
The same symptoms on an Asko microwave point to several possible problems, so the causes here start with the most common. Ruling each out in turn shows whether your microwave has a quick fix or a problem that needs proper diagnosis and the right parts.
- Thermal switch stuck closed — the switch that should end the cooling cycle once temperature drops does not open
- Control board logic problem — the board’s timer or thermal logic controlling the fan does not reset correctly
- Relay stuck closed — the relay powering the fan does not release even when the control calls for it to stop
- Ventilation blockage causing a genuinely elevated internal temperature — if airflow around the built-in unit is restricted, the fan may be running correctly in response to real heat buildup
Troubleshooting steps you can try
Take these checks in sequence on your Asko microwave before booking, as the simplest ones resolve a surprising number of problems. Stop at any step on the microwave that brings you close to mains power, gas, a hot oven, water, or a sealed component, and call a qualified technician.
- Check that the ventilation space around the built-in unit is not blocked by cabinetry, storage, or debris.
- Time how long the fan runs after use to confirm it genuinely never stops, rather than just running longer than expected.
- Isolate the unit at the breaker for a few minutes and reconnect, since a control logic problem can sometimes clear with a reset.
- Note whether the fan runs even on days the unit was not used at all.
- If the fan will not stop after confirming ventilation is clear and a reset has been tried, book a technician.
Parts a technician may replace
For this condition on your Asko microwave, a technician is most likely to inspect, test, or replace the cooling fan motor, thermal switch, and fan relay. The right one is matched from your microwave’s model, serial, and Art. No., and confirming the failed part before ordering protects both the repair and the microwave’s long working life.
When to call a technician
A technician tests the thermal switch and fan relay and checks the control board’s cooldown logic before replacing the faulty component. Rated Low severity, this condition does not put your Asko microwave at immediate risk; still, if Fan Runs Constantly persists on the microwave after you have worked through the steps, let a technician pin down the cause before replacing anything. Repairs to your Asko microwave are carried out independently, with no tie to Asko, Gorenje, or Hisense; we use experienced technicians and genuine OEM or trusted-supplier parts, and stand behind the labor on your microwave for 30 days. When arranging service, keep your Asko microwave’s model, serial, and Art. No. nearby so we can match the exact part for the microwave in advance and settle Fan Runs Constantly efficiently.
Related help and Asko resources
For a persistent Fan Runs Constantly on your Asko microwave, book Asko microwave repair, read our other microwave error-code guides, follow the step-by-step repair guides, schedule service whenever works for you, or check your city on our locations page. For the official specifications behind your Asko microwave, visit the manufacturer at global.asko.com.
