2010 prius high temp light flashing bleed system but still have a flashing temp light . Please help

Hello everyone I'm Robert new to the forum. I am the owner of a 2010 Prius 240,000 Mile car last night I was driving the vehicle and the high temperature light came on.so i drove it home Check the fluid and fluid level was fine so I bleed the system and turn on the heater and the problem still persists .the light keeps flashing so I bleed the system again and same results the light came on again . any help would be appreciated if anybody knows how to fix this I would really appreciate your help

 

Hello raytheeagle thank you for your response . I watched this video on YouTube where the gentlemen states that you add the antifreeze to the water reservoir and you put the car into maintenance mode and then you watch to see if there's any air bubbles and once the air bubbles are gone he says to turn on the heater and you should be good I did all this but I still have the light coming on. Unfortunately I do not have a code reader I replace the water pump brand new from the dealer maybe 2 months ago

 

I purchased this vehicle from a gentleman who said that one day he was driving down the road and vehicle just turned off on him and he didn't want to deal with it anymore so I bought it off him and when I purchased it I took it to the hybrid mechanic and he said that the water pump was bad because it was not circulating water so that's why the vehicle turn off on him and that's why I change the water pump. I'm not sure if they change the thermostat . I'm Really not sure about the problem I'm gonna take it in on Tuesday so they can check it