I need to check and see if my thermostat is stuck.. but don't know where it is. yesterday it's very cold. car isn't showing hot andthe heat don't work though. after work 9 hours later the heat works but then car overheats. i top off antifreeze and it's not running hot but no heat still. this is a ford probe gt 1994. 6cyl.
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Re: location of thermostat
Did you run the engine with rad cap off & heater (not defrost) on while topping up the coolant. If not, do it & let it run that way until your rad fan comes on & off about 3 times, then top rad up to a inch or 2 from top, and put cap back on, & check level in return bottle.
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you may have a bad head gasket causing this to happen. don`t know where you live but if it`s in a cold area you may not notice if its has white smoke(as burning coolant in cold weather may look normal)this can cause the problems you listed.it may not burn enough to show on plugs but over time you will loose coolant.it could also be a bad thermostat that has stuck closed causing overheating and boiling out. the thermostat is the cheapest thing to try then if it doesn`t fix it then have the head gasket checked out or do both at the same time
The thermostat is located on the rightside of the truck as viewed from the drivers seat. Follow the upper rad hose it connects to the thermostat housing. A good way to check if the thermostat is stuck is when the motor running and fully warmed up squeeze the hoses if it is hard then the thermostat is stuck. Another way is with the motor hot feel if the upper rad hose is hot; if it's not then your thermostat is stuck. Hope this helps.
replace the thermostat,, and make sure that the fan engages , just because the fluids don't boil over doesn't mean the temp isn't to high, if your saying that the temp gauge is stuck on the hot setting, and doesn't move even when the car is cold,, thats a different problem,, if thats the case whats the make , model , and year
A clogged radiator could be your problem. Flushing won't necessarily clean out a clogged radiator. When it's idling and getting hot, the clutch fan should be running full on, actually "roaring" as some say, and the electric auxiliary fan or fans should be on if you have them. Also test your radiator cap, replace if needed. Hope this helps.
Let the truck run for about 15 minutes. If the engine temperature does not come up turn the heater on and check to see if the air coming out is hot or cool. If it is hot the engine's thermostat is operating fine and most likely the problem is with the temperature sending unit for the gauge. If the air is cool the thermostat is stuck open. Try replacing the thermostat if the air is cool.