2011 Jeep Liberty Heat blows cold

Oldstorqnpower yes good flow from radiator b4 capping. The Jeep was at Valvoline, they topped with recommended coolant.

Tennisshoes do you think it is air pockets 100% the issue or could it be something else? The guy who flushed the core said it's working and he thinks it's the temp control actuator because he heard it click and the heat came on. But we disagree because we haven't touched the temp control since then and the truck is blowing cold again!

The thermostat showed the truck warms up from cold to between cold and hot so I assumed it was functioning properly. Is it the same t-stat that displays on the dashboard?

Now wife says the dash had a clicking noise near the climate control and the heat turned back on.

Don’t know if this is too late, but based on that clicking noise and your symptoms it is most likely your blend door actuator/motor, look it up on YouTube and you’ll find videos showing where it is and you can easily see if it is working by turning the hot/cold dial back and forth and checking to see if the gears are moving on the motor, if they aren’t when you don’t have heat then that’s the culprit.

I have replaced 2 heater cores and 2 motors in the past 3 years. Barely warm air after heating it up for a half hour.

Heater core half plugged, very difficult to flush, the old style core could be reversed flushed,, you had 1 inlet and 1 outlet of a continuous tube, new cores in the Liberty are set up like a radiator, tank on top and bottom, when they plug farthest from the inlet, the fluid takes the path of least resistance, therefore only half is getting the hot coolant. found this on my daughters 2008 Liberty. Had to replace core !!!

It was the blend door actuator

Had this problem checked for actuator ended up flushing heater core in both directions multiple times a lot of crud came out. Then filled with CLR let sit 20 min and flushed both ways again 2 times. Heat is amazing