-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Notebooks
- Business Notebooks
- Fan constantly runs when power is plugged in - HP ProBook 45...

Create an account on the HP Community to personalize your profile and ask a question
06-27-2022 06:09 PM
Have recently noticed that my laptop fan runs full speed when I plugin the charger and it works perfectly when charger is unplugged.
Tests done from my end.
1. Power Drain
2. Battery Calibration
3. Software Update
4. System Update
5. Tested with another charger
Please suggest what can be the issue.
Solved! Go to Solution.
Accepted Solutions
06-28-2022 04:40 PM - edited 06-28-2022 04:41 PM
Hello @Vishwa_Raju
Recommendation and solution:
In your case: Service is required !
- The computer should be disassembled and checked.
- Thermal paste for CPU GPU and bridges should be renewed
- The function of the fan(s) must be checked
- General cleaning ...
If you can't do that, you should have it serviced by a professional notebook (chip level) repair store.
best regards
---
Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and
make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️
Do this on the post I wrote that helped solve it.
Thank you very much
⌨️
06-27-2022 06:43 PM
Hello @Vishwa_Raju
(1) Install BIOS
HP BIOS and System Firmware (T70/T85/T87/T88/T89/T99) | 01.09.01 Rev.A | 111.0 MB | May 13, 2022 | Download |
Why ?
https://support.hp.com/us-en/document/ish_4123786-2338478-16
Quote: "
Updating the BIOS is recommended as standard maintenance of the computer. It can also help resolve the following issues:
- An available BIOS update resolves a specific issue or improves computer performance.
- The current BIOS does not support a hardware component or a Windows upgrade.
- HP Support recommends installing a specific BIOS update.
"
(2) Install Diagnostics UEFI Update
HP PC Hardware Diagnostics UEFI | 8.4.1.0 Rev.A | 61.4 MB | Nov 30, 2021 | Download |
(3) Check you notebook for hardware errors:
Using the HP PC Hardware Diagnostics (UEFI) to diagnose hardware errors ...
https://support.hp.com/id-en/document/c04499777
Watch how it works:
https://www.youtube.com/watch?v=14GKIpGPNRM&ab_channel=HPSupport
(4) Enter BIOS and look for a System Configuration Option: Fan Always On <Enabled> and set to <Disabled>
See also:
HP Notebook PCs - Fan is noisy and spins constantly (Windows)
https://support.hp.com/us-en/document/ish_3045299-2819686-16
(5) Reboot and test again ...
Please report your results
best regards
---
Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and
make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️
Do this on the post I wrote that helped solve it.
Thank you very much
⌨️
06-28-2022 04:40 PM - edited 06-28-2022 04:41 PM
Hello @Vishwa_Raju
Recommendation and solution:
In your case: Service is required !
- The computer should be disassembled and checked.
- Thermal paste for CPU GPU and bridges should be renewed
- The function of the fan(s) must be checked
- General cleaning ...
If you can't do that, you should have it serviced by a professional notebook (chip level) repair store.
best regards
---
Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and
make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️
Do this on the post I wrote that helped solve it.
Thank you very much
⌨️