What Abnormal Fan Noise Means
The same table that tells owners ordinary fan noise is normal also lists abnormal fan noise separately, and gives it a single cause: the cooling fan is damaged. The remedy printed against it is to get an electrician in rather than to wait it out.
Common Causes of Abnormal Fan Noise
- A worn fan bearing starting to rumble or whine
- Dust or debris drawn into the fan and fouling the blades
- A fan blade damaged or out of balance
🔧 One Safe Check You Can Try
Listen for whether the noise changes when the hob is working hard, and note whether it continues after the zones are switched off - the manual points out the fan is meant to keep running for a while afterwards. Beyond noting what you hear, there is no user step for this one.
⚠ Why You Shouldn't Go Further Than That
- The manual specifically warns against disconnecting the appliance while the fan is still running, so the hob is allowed to finish cooling before the breaker goes off and anything is opened.
- A failing fan usually announces itself before the overheat protection starts cutting zones out, and ignoring it simply means dealing with both problems at once later.
- Reaching the fan means going into the bay under the glass on a high-current appliance, which is why the published answer is an electrician rather than a homeowner.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.