Overheating fans?

[MCimag]

Ok after idleing for like ten minutes the temp gaugegoes 3/4's the way up and after like five more minutes the car is almost in the red zone I noticed my fans do not come on until i turn the car off the coolent is 50/50 and filled to the proper levels and the thermostat was just replaced just want to know why my fansonly come on when the car is off I tried turning on the a/c and the fan still does not turn on. Thanks

[h22sparkle]

what color is your coolant when you take the radiator cap off when the car is cooled? just because you changed your thermostat doesnt mean it could be faulty just a thought. Also are you shooting any codes i remember when my thermoswitch thats screwed into the head of the block just below the distributor it would give false readings and cause the fans not to operate. pray its not your headgasket or waterpump

[MCimag]

the coolent is a good color no oil or anything no codes no check engine light just the fans do not come on only when the car is off do i need to replace oe of those two coolent sensors or the fan timer or relay or somthing i dont think it is my headgasket or water pump both radiator hoses are the temp to the touch and the same stiffness

[NAiL05]

When you turn on the AC which fans turn on? Do none of them turn on? Could be a bad fan switch. IF one turns on at least with the AC on then the other thats not working needs the motor replaced. But I would make sure all your connections are connected but I would check the fan switch prob no good.

[MCimag]

no the fans do not come on when i turn on the a/c but when i turn off the car and it is hot enough the fan turn on and stay for about five to ten minutes they never come on when the car is on

[NAiL05]

Check the fan switch then prob sending the wrong signal or its jsut broke.

[MCimag]

Check the fan switch then prob sending the wrong signal or its jsut broke.

Thanks where is the fan switch you dont have a pic is that the thing on the thermostat or the thing under the dash no idea what i am looking for.
thanks for your help

[NAiL05]

I think its located on the front radiator neck in the front of the car. if I remember its one of those I know its not on the t-stat housing. The parts store should be able to tell you. Havent replaced mine in a while.

[CallMeRay]

if you or someone you know has a multimeter, check the switch for continuity, if there isn't any in the switch, then it has an open : / ie:bad switch

[MCimag]

so where exactly is this switch i have to replace? is it the one one the thermostat? thanks

[bruno8747]

when you replaced the thermostat did you bleed the coolant system? If there is air in the system it will overheat.

Also the fan switch is on the coolant neck right by the distrubitor. The top radiator hose goes to the neck.

[MCimag]

ya i did bleed it when i change the thermostat and i did it again when i noticed the fans where not coming on while the car is on. thanks and you dont have a pick of what the switch looks like?

[bruno8747]

You cant miss the switch, It has a green connector i believe going into it, its a simple 2 wire connector. If you follow where the upper radiator hose goes you will see it infront of you. As mentioned before check the switch if its working or if its broken.

[KINGPIN33]

While your checking your cooling system, its not too bad of an idea to pressure test it. Check the radiator cap while your at it too.

[MCimag]

the radiator is about 6 months old the cap looks like crap woud that be the reason the fans do not come on and how can i tell if one of the switchs are bad