Pc overheating please help

Hey guys i bought my pc from here about 2 years ago and i LOVE this site but recently my pcnis over heating and turns off after 5minutes tops.

I notice one of the tubes going from fan into cpu is roasting hot which i believe is the problem but im unsure on how to fix and i really cant afford a new pc already!
 
Oh i can no longer find that :( as i dont have that email anymore


I just know its
Ryzen 3900x 12 core
16gb ram
Nvidua geforce rtx 2070
 
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