Where can I buy replacement fans?

You can order from here: https://www.cdsparts.com/p-10204-acer-predator-helios-300-g3-571-g3-572-ph317-51-laptop-cpu-fan.aspx
       Please click yes if I have answered your question.

Maybe someone have an answer to this question, as I don`t have it and it could be anything.

Ranchy said:

batmalin said:

You can order from here: https://www.cdsparts.com/p-10204-acer-predator-helios-300-g3-571-g3-572-ph317-51-laptop-cpu-fan.aspx
       Please click yes if I have answered your question.

Thanks for the response. But I do have a question before I order them. This may seem odd, but if both fans arn't working now does replacing them garuntee they will work? How can I be sure it's not a motherboard or power issue to begin with. 

Try a little troubleshooting first. Easy stuff first, Open your laptop and verify the fan connections are secure. If you have a multimeter, you can verify voltage across the connecter. If there is no voltage present, then it goes deeper into the system. If you don't feel like you know what you are doing, and the laptop is still under warrantee contact Acer https://customerselfcare.acer.com/CS2/ otherwise, look up a local computer repair shop near you. They should be able to figure it out.