You most definately unpluged the sensor wire. It's a single red wired that plugs onto a sensor just passed the thermostat.
It depends on what type of car you are working on. all cares have different temperature thermostats. A very common temperature is 195 degrees
There are a few possible reasons your temperature gauge may not be working after replacing the thermostat in your Mercury Topaz. It could be due to a faulty temperature sensor, a wiring issue, or a malfunctioning instrument cluster. I recommend checking these components for any issues and ensuring they are functioning properly.
Low coolant? Bad thermostat? Heater core restricted, plugged or airbound? Temperature control not working? Water pump not circulating coolant?
You can tell if a thermostat is working properly by checking if the temperature displayed matches the actual room temperature, if the heating or cooling system turns on and off as expected, and if the programmed schedule is being followed accurately. If you suspect a problem, you may also consider calibrating or replacing the thermostat.
depends on the thermostat. Typically 195 degrees Fahrenheit
possible plugged radiator, sticking thermostat, rad fan not working, temperature sensor not working, low coolant level. that's just a starting point. possible plugged radiator, sticking thermostat, rad fan not working, temperature sensor not working, low coolant level. that's just a starting point.
Low coolant? Bad thermostat? Heater core plugged, restricted, or airbound? Temperature control cable not working?
In a 2002 Mercury Cougar, the thermostat is located on the engine, specifically at the engine's front, near the water pump. To access it, you typically need to remove the upper radiator hose, as the thermostat is housed in a thermostat housing that connects to the engine block. Always consult the vehicle's service manual for detailed instructions and safety precautions when working on the cooling system.
System airbound and needs to be purged
Mercury thermometers work on the principle that mercury expands when heated and contracts when cooled. The scale on the thermometer is calibrated based on this expansion and contraction, allowing it to measure temperature accurately. When the temperature rises, the mercury expands and rises up the tube, and when the temperature falls, the mercury contracts and moves back down the tube.
I had similar problem with a mercury tracer I owned I had two problems with mine, One the thermostat was faulty(was old and rusted out) and the temperature sending unit wasn't working right ( Fan did not come on at needed temperature 205 degrees) so I had to replace them both. Hope this helps
Either the thermostat is not working properly or the temperature sensor is displaying wrong on your gauge.