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A 15 inch laptop made between 2013 and 2015 by Dell computers.

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Fans not switching on after cleaning them?

I removed my fans to clean the inside of my laptop, after putting them back in they won't run. I can put them in but not all the way, but then they run at full speed permanently. I've tried changing the settings to passive and not active but still nothing has changed. The moment I switch my laptop on the fans run at max speed…I don't want them running at max. Please could someone assist me?

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What do you mean by "I can put them in but not all the way" ? What is "them"? The fan connectors? The fans themselves?

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The connection. If I hold the connectors and it just just touched the port then the fans run at max. But when I insert the plug securely then the fans do not work

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Hi @logank02 ,

Here’s the owner manual for the laptop.

Go to p.24 onwards to view how to remove and replace the fans.

They need to be seated properly otherwise the airflow from the CPU & GPU may not be good enough to extract the heat fast enough. The CPU has an internal thermal sensor (don’t know about the GPU but it most probably has one too) and that is most probably why the fans are on high trying to cool them down as best they can.

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Hi thank you. I've actually posted this for a friend. I showed the manual to him and he says that he has inserted the fans correctly. I think the best thing to do, is to get someone to look at it and see what he has done incorrectly.

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Logan Kirchner will be eternally grateful.
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