sounds like your thermostat is stuck closed, maybe some of the debris loosened from the flush is blocking it.
Could be the thermostat not opening
Have flushed complete cooling system replaced water pump radiator thermostat clutch fan added 2gal straight anti freeze then filled to capacity with water and truck is still over heating. What else could possibly be wrong
have you flushed your radiator or changed the thermostat it could be stuck
water pump
Could be your electric fan on the radiator is shot, or the relay is bad.
it could either be your thermostat is bad, the radiator is bad, or you could have a blown head gasket.
There could be many reasons. Not enough coolant or bad flow, faulty thermostat, low oil. If the coolant freezes then it will overheat. If your car continues to overheat then you should have the coolant flushed and thermostat replaced.
could be a bad thermostat try replacing it answer try flushing out your heater core also
It could be a Head Gasket, Thermostat, water pump, bad radiator or just needs coolant. start with the cheapest which is a thermostat.
it could be the thermostat needs to be changed or the heater core needs to be flushed out.these would be the cheaper things to try first.
It could be a clogged radiator or cracked head or bad head gasket.
It could be you thermostat is bad.take it out and replace They're cheap and easy to install.