Ok so i start my car everything seems to be ok, the heat starts pumping im all happy and warm. after a while im driving and the temp is going to like 110, 120 the fan does not seem to be going on and now im freezing because i have cold air blowing from my heater. why does my car hate me?
can the coolant temp sensor cause this problem ? to have hot air then cold? i have had the thermostat changed and the fan does work i find the top hose gets hot. the bottom hose stays cold for a while. when i leave the rad cap off sometimes the fan will kick in other times the coolant just starts coming out of the tank? i hope anyone reading this is not as confused as i am writing it do these cars run at hight temperatures? or what is normal?
I was thinking maybe water pump or something clogged
Since the fan switch is on the left side of the radiator it must be circulating some coolant to turn the fans on. It sounds like not much coolant is circulating to the heater core. Has the cooling system been cleaned/flushed lately? Or like was stated above it has air in the system and needs bled out.
I'm having Identical issues with 2008 Jeep GC. New water pump, 2 different thermostats,New coolant temp sensor,New Heater core,Blower fan, all new hoses and Belts,new radiator cap,and flow through radiator is excellent, yet Fan (Hi) runs too often I feel and I never hear a (LOW) fan cycle. I live at 9,600' ft. Thermostat is located on bottom of engine and coolant wants to boil out before t-stat will open and lower hose is frozen at times. Thermostat has to be installed to seal up lower housing.Would like to relocate t-stat to TOP of engine where it NEEDS to be! I havent seen any control valve on hoses and no clicking sounds from dash area. Have removed air bleed plug as well. Am considering installing both heat and pressure gauges. Head gaskets seem fine too.Even checked spin direction of water pump. I do have faulty Keyless Node Ignition...Could this be affecting blend door operation ? All fuses tested also
×
Um...strange ...engine temp reaches 210 before thermostat opens and lets water circulate ..fans go on before that normally..180 or so..hot air from heater going to cold air? strange...could you elaborate for me /us?
Fig. 1: View of the Engine Coolant Temperature (ECT) sensor
Fig. 2: Engine Coolant Temperature (ECT) sensor locationTESTING
Fig. 3: Intake Air Temperature (IAT) and Engine Coolant Temperature (ECT) sensor wiring diagram
Fig. 4: ECT sensor temperature vs. resistance values
601 views
Usually answered in minutes!
i will do my best i start the car because i keep thinking there is air in the top hose and take the cap off to bleed it or get the air out it takes forever for the temp guage in the car to get up to 90 at this point the top hose is very hot but the bottom one still cold a couple times the bottom hose finally starts to heat up and the fan goes on then others the coolant just starts backing up out of the coolant tank and the temp guage in the car is like 110 or 120
if i just go driving the temp guage in the car usually goes above 90 to like 120 or 130 and i have hot air coming out of the heater but then it just starts comming out cold its friggin wierd
what is the normal temperature on the dash for these cars its in the middle which is 90 correct?
ITS A 1994 GOLF 2.0 GL
oh ya and when the car is just idling its cool air comming out when i rev the engine its gets hot
×