Low coolant in system and heater core needs to be flushed or changedAnswerThere could also be is (air pocket) air in the system. If motor is cool and resivoir is full. Fill radiator from upper radiator hose run till warm then re-check resivoir. AnswerClassic head gasket leak, (a bad one probably ) Answerone thing every one missed is the thermostat if the colant is full and the car is running good other than the cold air and over heating i would change the thermostat before i would the head gaskets, one way to check the thermstat is to start the car and let it run till the gauge gets to mid range, shut the engine off and feel your radiator if its cold your thermostat is bad, another method is to pull the thermostat it should be closed when its cold, put it in a pan of water and heat it to between 185 to 195 degrees using a thermometer to check the temp, once that temp is reached the thermostat should open if it does its good and if it does not than its bad. if its a head gasket it will show one of these signs, one of the biggest signs on a couger is white smoke out the tail pipe, wich is burning antifreeze, another sign is water in the oil wich will make the oil on the dipstick look brown and milky or white and milky, another is oil in the water wich if you look in the radiator there will be brown or black spots of oil. if any of these apear you have a blown head gasket,the other way you can check is to buy a compression tester and test each cylinder for the correct compression. Michael
with your eyes
On a 2000 Mercury Cougar : The warning light that looks like a can with an X through it , located between the engine coolant temperature gauge and the tachometer ( at the bottom of the gauge cluster ) is your ( LOW engine cooling system warning light )
Is vehicle actually overheating? Could be a bad temperature sending unit or gauge Check temperature with a thermometer If thermostat does not open vehicle will overheat
Your car is starting to overheat or your thermostat is going out. Get it checked.
mostly likely something wrong with the sensor or gauge.
well your car needs a new body kit because that contributes to the temperature of the car
Does vehicle overheat rapidly? Do you have heat? Does temperature gauge show that vehicle is running cold
If you temperature gauge is going up and down then you may have a problem with your sensor. You should take your car to a professional to ensure that you don't overheat your car.
You have to pull the gauge assy out and the lights are mounted from the rear. Run1
Connect a gauge to the low side ac port. Connect Freon to the gauge. With the ac running, open the valve and allow Freon to fill the system.
Check your thermostat. Looks like it is stuck open and needs replacing. That could be why your engine is running cold. Atleast its not stuck in the closed position.
No - the gauge reports 'real-time' the engine temperature. If it is wrong, there is a problem with the sending unit on the engine. This is a pretty easy fix...