Jeep 2003 liberty, only 60 000kms. Upper radiator hose is hot but lower is cold. Very little heat coming into vehicle?

. Reverse flush the heater core.

. Check the heater control valve, if the problem persists.

I have done a radiator and heater core flus I've done the calibratio I put a new thermostat I check the vacuum hoses in the dash I have check the vacuum hoses in the dash I have suction any idea

Faulty control valve? Blend door actuator problem? Check all under hood and under dash fuses with a test light or multimeter.