Hey fellas, I'm having a little problem here with my girls 97 prelude. For whatever reason, the E fans won't kick on when this thing is getting hot. I mean it was all the way in the red and I had to kick the heater on full blast to get it down. This was while it was 90+ degrees out here The one thing that I have noticed was that the E fans will only kick on during the use of the A/C. So my question is WHY?? What would cause my A/C to be able to kick on my fans and not have the overheating temperature kick it on??? Is there a temp sensor that I'm not aware of?? Any help would be appreciated!! Thanks

Nick

 

Could be multiple problems,

Coolant Temp Sensor, Fan Switch....I suggest you don't drive the car until this problem is fixed, you don't want to warp the head.

EDIT: Thermostat should be good, since you stated that when you turned the heat on it cooled off.

 

How can i tell which one it is? (temp or switch)

 

Is there a check engine light?

 

Nope, no light!!

 

Then its most likely the fan switch

 

there is 2 fans. one is a radiator fan (turns on only when the engine reaches a preset temp usually 215 or so) the second fan is for the ac condensor (turns on only when the ac is on). the radiator fan is controlled by the computor. there is a relay and a fuse in the circuit. its fuse #47 and it is a 20amp. check the fuse. if the fuse is good, try and power the fan with a 12v supply @ the fan itself. does it only over heat at idle or does it over heat when you drive?

 

Both!! If I'm driving then idle, it rises pretty quickly! When I drive again it starts to cool down slightly, but still is way above the half mark!

Checked em and none are blown

Is it wierd that my A/C turns them both on!!? I know its getting power and is still running though because of that.

 

Not necessarily, it could be stuck closed, which will still allow for the heat to work but cause the car to overheat. I recently (2 weeks ago) replaced my thermostat because I was having a major overheating issue. It was like 40 bucks and you can put it in yourself.

 

Not trying to be a dick but do you have coolant in it?