No heat

Okay so iv been on here a couple times about this issue and everyone said blend doors had my doubts but cut her open and its not blend doors this is a 99 xj so no heater control valve this f*cker has been flused twice over time so I got hot ass hoses headed to heater core and a cold ass heater core what's up can anyone help?

Blocked heater core. Plan a weekend to replace.

Try blowing it out with a garden hose. Keep switching direction until water flows clear. I have had to do it on my last 2 XJs.