What is the purpose of coolant temp sensor & thermostat? & result of vaulty operation? ?

Question

What happens when these items are not working properly?

Answer 1

THE SENSOR TELLS YOU AND THE COMPUTER WHAT TEMP THE COOLANT IS INSIDE THE ENGINE BLOCK THE THERMOSTAT IS A GATE THAT OPENS WHEN THE BLOCK COOLANT REACHES A PERSCRIBED BLOCK TEMP BY MELTING A WAX PELLET,AND ALLOWING CIRCULATION OF COOLANT TO GO THROUGH THE RADIATOR TO REMOVE HEAT. RESULT OF EITHER GOING BAD AND THE DRIVER NOT LISTENING TO ENGINE SOUNDS CAN BE FATAL TO THE ENGINE SINCE MOST ENGINES NOW ARE MADE OF ALLUMINUM AND ARE NOT VERY FORGIVING TO HIGH HEAT

Answer 2

the temp sensor monitors the temp of the engine and informs the onboard computer and the computer adjusts sensors and devices accordingly.... if the thermostat is not working right, the temp sensor will detect it and sends info that the temperature is out of specs.. the result of faulty operation is a new engine.  

Answer 3

If your thermostat is bad the car will more than likely be overheating and the upper radiator hose will be hard, backed up with pressure.  It basically closes off the flow of coolant.

Some vehicles have two temp sensors.  One for the computer to regulate cold starts and overall vehicle operation, and one for your temp gauge on the dash.

Answer 4

The coolant temp sensor tells the computer the temp of the eng for fuel mixur if eng has elec cooling fan it will turn them on. thermostat stays close allowing eng warm up faster once it reaches proper temp it opens and allow coolant flow . if coolant temp fails to work right could cause hard start run rich an overheat. If thermostat fails eng could overheatif it stick close. If thermostat stays open eng wont warm up may not have heat during winter mounths.