The Yoga 9i 2-in-1 Gen 9 is a 14 inch convertible with a Core Ultra 7 155H chip and a 2.8K OLED screen, and the most repeated complaint about the Yoga 9 line on Lenovo's community is a fan that is nearly always running. Owners report that web browsing and video make the fans blow loudly, and several say it is worse in tent and tablet mode, because folding the screen back covers or restricts the vents on the underside and the hinge. Performance mode can push temperatures very high, with one owner noting the case reaching the high 130s Fahrenheit, while owners say Eco or Balanced modes keep a light workload cool.
Press Fn+Q to cycle Intelligent Cooling modes, and use Lenovo Vantage or Windows power mode for the same effect. A convertible with a thin body has little room for heat, so a hard flat surface, with the vents clear and the laptop in clamshell mode, matters more here than on a thick laptop. Keep the laptop's air path in mind when the screen is folded into a stand shape: the base's underside intake works best when the base lies flat, so a tent position over a soft surface starves the fan.
Differential
Likely causes of “Lenovo Yoga 9i 2-in-1 Gen 9 runs hot or the fan is loud”, and how to tell them apart
- 1
Performance cooling mode
What separates it Loud fan and a hot case on light work
How to confirm Press Fn+Q and choose Intelligent or Eco cooling
- 2
Tent or tablet mode
What separates it The fans run harder with the screen folded back
How to confirm Use clamshell mode for heavy work, or stand it on a hard surface
- 3
A background process
What separates it The fan runs at idle
How to confirm Task Manager: end the process that is using the CPU
- 4
Blocked vents or a soft surface
What separates it The laptop is hot on a bed or lap
How to confirm Use a hard flat surface and clear the vents
- 5
A BIOS or driver issue
What separates it The fan curve seems wrong after an update
How to confirm Install the latest BIOS and Lenovo Vantage updates
Before you touch a setting
Record this first — changing settings destroys the evidence
- The Fn+Q cooling mode
- Whether it is in clamshell, tent or tablet mode
- The top process in Task Manager
- The surface and vent condition
Try in this order
0 of 6 completedCheck the cooling mode
ReversiblePress Fn+Q and note the mode; choose Intelligent or Eco for light work such as browsing and video.
Check what is using the processor
ReversibleOpen Task Manager and sort by CPU; end or update any app that stays busy at idle.
Use clamshell mode for heavy work
ReversibleFold the screen back to the normal position, since tent and tablet modes restrict airflow on a thin body.
Put it on a hard flat surface
ReversibleA desk or a stand, not a bed, so the intake and exhaust are clear.
Install the BIOS and Vantage updates
ReversibleLenovo's updates adjust fan behavior and fix thermal bugs.
Clean the vents
ReversibleWith the laptop off, use short bursts of air into the vents.
Model-specific
What is true of this model and not of its siblings
- A convertible's constraint
- A body this thin has little room for heat, so mode and surface matter.
- Owner reports
- Lenovo community owners describe near-constant fans on the Yoga 9 line.
- Eco mode
- It keeps light workloads cool at the cost of peak speed.
Stop boundary
When this stops being a self-service repair
- !If the laptop overheats and throttles in Eco mode on a hard surface, contact Lenovo
- !If a fan grinds, it needs repair
- !A burning smell means shut down
Evidence ledger
Sources behind this answer
Owners of the Yoga 9 line describing constant fan noise, including in tent and tablet mode.
Listing of the Gen 9 configuration: 14-inch 2.8K OLED, 120 Hz, Core Ultra 7 155H.
Exact questions
Common questions
Why is my Yoga 9i fan always on?+
A thin body, a busy process or a performance cooling mode.
Is tablet mode hotter?+
Owners report louder fans in tent and tablet mode.
What does Fn+Q do?+
It cycles Intelligent Cooling modes.
Is 130 degrees Fahrenheit normal?+
The case can reach it under load in Performance mode, but a cooler mode lowers it.