MY COOLING FAN TO RADIATOR IS NOT COMING ON ...WHERE IS THIS SENSOR LOCATED THAT SENSES COOLANT TEMP..i DONT BELIEVE THE RELAYS ARE MALFUNCTIONING
The sensor located at thermostat housing is for the temp gauge..i am still looking for this myself
SOURCE: coolant fan temp sensor location on a 2003 chevy venture
located in thermostat housing or in intake nearby (where top hose connects from radiator to engine)
SOURCE: replace coolant sensor an 2 cooling fan relays an
The cooling fans are designed to come on at about 215 degrees to 219 degrees,and I have seen them come on at 225 degrees,the engine is designed to average 232 degrees at the most,it may not be warm enough to come on the first time,but the thermostat,if stuck will prevent this also,and you need to bleed the air out of the cooling system.
SOURCE: 2001 Chevy Venture Cooling Fans always running on high
either the temp sensor is bad but, it sounds like the fan relay is stuck.
replace the relay its in the fuse box.
SOURCE: Complicated problem here. 2003 Chevrolet
A few different things have happened here, either you have a bad ground circuit, you have a brand new bum sensor, or quite possibly the pcm has an issue. If this was aftermarket sensor (Auto Zone or other), it could be faulty. Take it back and have them give you another. This way you don't spend money right off the bat. So let me understand, (1) when you turn on the A/C, fans come on, (2) you unplug the temp. sensor and the fail safe kicks in?!! Run the car until the operating temperature is obtained (220 deg fahreheit) and then turn the heater on making sure that heat is sufficient and no air bubbles are in the system. at 222 deg f, the fans should kick on. Listen for either low or high speed to engage. I am saying this to cover basic steps and work up to further diagnostics. Let me know what you have covered and I can send diagrams and further help.
Cooling Thermostat.
Toyota Celica Thermal Fan Switch
The Toyota Celica thermal radiator fan switch is usually located in the radiator or the engine block and has 2 or 3 wires coming from the unit. The 3 wire switch has a dual sensor for dual speed radiator fans. The Toyota Celica thermo fan switches come in the factory temperature settings and also come in cooler thermostatic settings so the fan will come on at a lower coolant temp.712 views
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