Lots of pumps do not have the built-in functionality to do that natively (they need to bypass the heating element as I understand it). There are add-ons such a

Lots of pumps do not have the built-in functionality to do that natively (they need to bypass the heating element as I understand it). There are add-ons such as https://thermia.com/products/accessories/cooling-module/ https://thermia.com/products/accessories/cooling-module/