I have had system flushed replaced radiator(it leaked). New upper and lower hoses, new thermo what manual called for. I had some heat. Had water pumped replaced ( leaking) heater core flushed a few times, now i have no heat. Hose to heater core is hot, return hose is cold. any ideas, suggestions?

 

Sounds like you have a blockage at the heater core if one hose is hot and the other is cold. Sounds like the heater core still needs to be flushed some more..

 

Also possibly a blockage in the return hose. Remove the return hose from the core and see if it flows through. Assuming you did a flush I would think this would be confirmed already

 

Lastly, do you have a laser temperature gun? (here's an example - https://www.harborfreight.com/121-in...ter-63985.html)

If so, what are the temperature readings for the inlet and outlet heater core hoses?

 

Classic symptom of a clogged heater core. Unhook your hoses to the core. Press a garden hose into the cooler hose and reverse flow it. It's possible some gooky stuff (<--------fancy technical term) got loose and got in there. If you reverse flush the hoses, with the drain to the floor, not back into the engine, it may come loose.