my fan run at muximum speed from the moment i turn the lap top on

[mohammadk92]

He Guys
from 3 days ago, when i turn my lap top on, laptop's fan start at maximum speed. and it never goes off . what should i do ?

please Help me
Thanks

[erico]

Enter the BIOS to ensure that the fan always on option is not enabled. If it is, disable it. Don't forget to save the change.

You may need to perform an intake/exhaust duct cleaning t=with a can of compressed PC air. 

If the exhaust ports are blocked, that would also trigger the Delta T algorithm in the BIOS ROM file to attempt to bring the temperatures down to within the limit.

[mohammadk92]

Dear Erico

I did both items you mentioned ,but it didn't work

I checked th BIOS option and the option "fan always on" wasn't on
I checked exhaust ports and they were not blocked.

Please tell me what other options can be . i am really appreciate it, 
please help

Thanks

[erico]

Inside the exhaust and intake ports are not somewhere you can really look into.

The blockage and dust may even be on the fan. 

That can't be visually checked unless the notebook is opened up and then inspected and cleaned.

Using PC compressed air in a can to blow low air pressure into the intake sometimes helps blow out ventilation obstructions.

Are you operating the notebook in a high ambient temperature?

[mohammadk92 · Accepted solution]

Dear Erico

I found the problem

first i would like to thank you for your kind replies your care about my problem and the solutions you gave me

now that i have found out the solution i just want to share it with other users, so it may be helpful for others.

problem : as soon as i turned the laptop on , my left fan started working at high speed and it works constantly at this speed.

solution : i opened the backside of laptop , suddenly i cared about the socket of the fan where it connect to main board, the socket was half open , i pushed the socket down and it made a click sound , after it it worked properly

just because of this simple reason i searched the web for one week to check why my fan is working constantly  with high speed