Desktop CPU Cooling System: open fan motor winding. An internal winding or cable conductor no longer carries current.

The distinguishing clue

The fan remains still despite a valid control command.

Checks before an assessment

Note whether temperature rises quickly after startup or only under sustained CPU work. Keep the case closed and avoid load tests if the cooler may be loose or the pump has stopped.

Stop point: A loose cooler can allow unsafe temperature rise within seconds.

Workshop confirmation and repair

Device-level check: Compare pump or fan speed, cooler mounting, case airflow and processor power under a controlled test.

Targeted check: Check supply, command and tachometer lines before condemning the fan. If confirmed: Replace the failed fan and inspect its cable routing.

Repair boundary: Repair the confirmed fan, pump, mounting, compound or airflow fault before extended load.

Related cause to rule out

When rattling, scraping or delayed fan startup changes with orientation, also consider Desktop CPU Cooling System: worn fan bearing before choosing a repair.

Checks after the work

After repair or replacement, check idle, processor stress, fan or pump speed and cooldown.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.