I have a 1995 Chevy Monte Carlo, when I get the car going, after it warms up, the temp gauge will go to hot , but the heater will blow out cold air then all of a sudden the temp will go down again and I get some heat through the heater. This keeps going on with it going up and down. Does this sound like I need to change the thermostat??|||probably a bad stat and low coolant.|||I would change the thermostat first, but that%26#039;s not the problem, its just one part of the problem. Something is wrong with your heater. You might check it by feeling if the return hose is warm when you%26#039;re having all these problems. It also sounds like there is some relay that is not opening the heater doors.|||Yeah it does sound like the thermostat is dodgy. For a start it shouldnt go all the way to hot from what iv been told. That is a sign off the radiator over heating. It should stay in the middle between cold and hot. Take it to a mechanic or get a family member or friend who knows a lil something about cars to chck it out!
Good luck :)|||It does sound like your thermostat is sticking.|||Sounds to me like you have air in the cooling system and need to bleed it first|||it sounds like it i would start with that is the cheapest part|||yeah or u must have a major electrical problem|||sure
