How to take out a thermastate?

What car are you referring to?

i just had almost same thing. i was getting heat then cold air. replace thermastate and bleed the air out of lline

Either the water pump not working,,or you have a clogg some where..I have seen the impellor break on the water pump..The outside pulley was turning but the inside wasnt..

Try checking the fluids if not that replace the thermastate

it might be your thermastate stuck close because it lets the collant to go into the engine chambers so if your thermastate is stuck is why it is over heating so you can take the thermastate out and test it yourself by putting it into water inside a pan that is on a stove to test to see if it opens up for you but also there are different thermastates out there that have different temperature ranges that you can put in place of that one so go to autozone they will explain to you which one could help you out the most.

how about the heater core? and the thermaste check your fulids in you radiator and is your termostat working properly?

check level .it could be headgasket

Sounds more like a partially restricted radiator.

Yes i would check if your radiator fin turns on when the engine gets warm.
Most likely thats the cause.

thermistate housing is the place you refer to it fuction is to hold a thermastate to open and close water flow at 150 to 190 degree according to car spectif the thermaste sticks it causes overheating and can blow the thermastate gasget, the tole cost is about 30$ at most for the thermastate and gasget...now many other things can cause a car to over heat and cause a hose leak and somtimes it is simple to just tighten the hiose clamp at the thrmastate and problem sovled see a water leak causes the radiator to lose presure and thus with out a sealed tight water cooling system the boiling point of water is lower and thus the car over heats when in doubt stop by the local gas station and have a tech take a quick look as it could be simple as the hose clamp difficult as a therm,astate but do not let it go to warp a head gasket as this blown headgasket is what is the end results of running a car to hot