Dear Customer,
Thank you for reaching out to Bitspower.
Did the pump run at full speed?
If you already cleaned the CPU block and the pump, and no changes,
It is better to exchange the pump with a stronger one.
Such as the Hercules pump (BPTA-PHCL).
Here is the link.
https://usa.bitspower.com/shop/index.php?route=product/product&product_id=8190&search=hercules
If you have any questions, feel free to contact us.