i was just driving around, and i heard the electric fan switch on. the temp gauge didnt show that it was overheating, and i wasent leaking anything.
what could it be?
im going to flush my radiator tomorrow prob to clean it all out...and then check all the hoses.

anyone have this happen?

 

The sensor is located on the tube near the water pump. If you disconnect it, the fan runs. It may be a bad thermo switch, or possibly the wire connecting it. Check those.

Greg O.

 

wait... what FC comes stock with an electric fan?

 

My 87 TII has one.

 

stock!?!?!

 

Yup.

 

Uh, that's supposed to happen.

TIIs and other RX-7s with A/C came with a small aux electric fan.

 

well mine has a manual one, i have a switch for it on the dash. but i didnt switch it on and it just popped on, in the summer when its super hot, it goes on, but its like 35-45 degrees out.

 

Then you have a short somewhere...I have no idea...If you have modified the wiring of your fan, it could be anything. Best inspect the wiring and relays involved to check for possible problems.

 

are you talking about the stock one?? or did you add one? the stock one shouldn't come on till 220F or when you turn on the A/C

 

i looked under the hood and i saw that my temp sensor is disconnected. could this be whyh my fan wont turn off??

 

and can everyone see this pic?

 

Yes! Unplugging that sensor will make the fan run.

 

ok, does anyone have a picture or can someone take a picture of that wires properly installed. cause i dont know why the hell its disconnected.

i guess thats the reason!

 

Well damn, learn something new everday, didnt know they came with an electric fan. Odd, none of my AC equiped N/A cars ever had an electric fan, nor do i see anything about it in the manual, but, i guess you guys cant be lying. Neat.

 

Actually I think if you ground it the fan runs.

Rob

 

well if thats the temp sensor, and the temp gauge still works, and the fan is always on now, what the hell is that wire? you know? shouldnt the temp gauge not work now that the wire is hanging loss? this is anoying

 

You say you have a manual switch to run the fan. Your problem could be the switch, the wiring to the switch or the relay. I'd check the wiring to the manual switch first. If that wire is grounded the fan will run.

Does the fan run all the time? Or does it cycle?

Rob

 

it only used to go on when it was really hot out in the middle of the summer, or when i flicked the switch for whatever reason, which was barely ever

i disconnected the fan at the fan. so now its not running. although on the dash the little red light on the temp gauge goes on now, which usually goes on if your overheating and then fan goes on, but im not overheating according to the gauge.

ill check for a rely to the fan switch.

mike

 

My fan comes on in the summer after spirited driving. Or if I have the car parked after driving it a while I will turn the key on and it will run. I guess the sensor gets heat soaked and clicks the fan on.

James

 

From your photo it looks like your sensor wire's just broken. Just find the other end of it (match the colour) and solder it back together.

 

I believe it was an option in the US, but all the FC's I've seen (JDM) have them. It's at the back of the Cooling System chapter in the S4 and S5 FSM's and on page 101 of the Haynes manual.

 

Not on the S4. The fan temp switch is normally closed and opens when the trigger temp is reached, turning on the fan. So pulling the wire off will have the same effect.
The S4 has quite a complicated system because it has a warning light that comes on when the fan runs due to high temp, but doesn't when the A/C runs the fan. It has a little control box under the dash.
The S5 doesn't have a warning light so the system is much simpler, just a relay switched by the temp switch. Grounding the S5's fan temp switch terminal will make the fan run.

 

That temp switch is just for the fan. The temp sender for the gauge is on the side of the engine's rear plate under the oil filter and next to the oil pressure gauge sender.

I think that's enough from me...

 

Let's see... 1,2,3,4 posts in a row... I guess all 4 of your voices in your head had something to say.