However, it is usually in close proximity of the thermostat of the cooling system, or inside it. Where to Find the Coolant Temperature Sensorĭifferent 2018 Jeep Compass manufacturers install the coolant temperature sensor differently. By this continuous monitoring of coolant resistance (and the voltage output), the coolant temperature sensor sends temperature information to the2018 Jeep Compass s engine control unit. This voltage output is sent to the electronic control unit of the vehicle, which constantly measures the resistance across the2018 Jeep Compass s coolant. As the temperature rises, the resistance of the2018 Jeep Compass s coolant drops and this in turn decreases the potential difference output. The temperature of a thermistor influences its resistance in an inverse proportion. Thus, principally, the coolant temperature sensor is a thermistor. As the temperature of the engine changes, the potential difference output of the device also changes, and this can be measured by the engine's control unit. This device works on the principle of dependence of potential difference in temperature. The Coolant Temperature Sensor's Function but when it's fixed, you must use the 50%/read-mixed coolant., abbreviated as CTS, in your 2018 Jeep Compass is an important device that enables the control unit to give alerts if the engine is overheating or if the temperature within the system is rising for some reason. since it won't be there long and coolant is expensive, if it's just going to leak out. If you're moving your car, use neat tap water in the cooling system for the time being. If it is, then that's probably the source of the leak. Coolant (even if it's leaked out and then dried in place) leaves behind a pinky-white residue, so you shouldn't see "wet" or "residue" anywhere. and also find that thermostat and see if it's wet. get under the car and look for a wet patch around the bottom of the radiator. it's ingesting it that does you damage.Īnyhow. especially if it's spilt or dripped somewhere and you touch it. so don't drink it, touch it, lick your fingers etc. If it's warm or almost cold, then you'll hear a "pffft" but even if it sprays out, it won't be hot hot.Ĭoolant is also the most toxic thing in your car, unless you have a One Direction CD in the glovebox. The system is pressurized so can spray out near-boiling (potentially) coolant if you undo the cap or any bleed valves. make sure it's not just air conditioner condensation) then it's probably a leaky radiator or thermostat housing, as has been described.ĭon't do any work/removing caps etc. If it has a sickly sweet smell, like your coolant. and in any case, you mentioned liquid on the ground. so you need to know where, since it's probably related to the problem. so there could be a physical leak (is the bottom of the radiator, or the pipe across the front of the engine, if yours is a 1.2, wet?) Otherwise, is the exhaust "steamy"? The coolant is going somewhere. If you had to fill the header tank, it sounds like it's losing fluid. If you keep getting air in the radiator, then it could have a head gasket problem (was the car super-cheap when you bought it?). Is the coolant a nice clean pink (or blue) or is it plain water, or filled with rusty liquid?Īfter the drive, let everything cool down completely and then when it's cold (next morning) repeat the check of the coolant level and check whether there is any air in the radiator. If that reduces the temperature slightly then you could have a dodgy water pump, or a clogged up radiator. turn the heater to MAX and the fan on full-chat. Then take the beast for a drive and see whether it overheats again. Refill the level to MAX, especially if you lost a lot of fluid or a load of air came out. ![]() and when coolant eventually comes out, tighten it up again. don't try to speed things up by turning it out too far. When coolant comes out, re-tighten it.ĭon't unscrew the screw so far that it comes out altogether, otherwise you'll get coolant pissing out everywhere Ahhhh Ahhhh and it's impossible to get the screw back in while that's flooding out. you should get air or coolant coming out. usually on the back of the radiator panel, at the top and on the left (as you look at it). There should be a bleed screw on the back of the radiator. When the level is at MAX, check that there is no air in the radiator. If it's not, fill it up to MAX with a 50% water/antifreeze mixture (unless your coolant is marked "ready to use", in which case use it as it comes out of the container). It should be at the "MAX" mark on the tube moulded to the radiator. first thing in the morning.) check the fluid level in the radiator. If the car is over-heating then it either doesn't have enough coolant, or the coolant isn't being cooled and circulated enough.
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