cooling fan wont start...

[JoPaS]

I'm soory if this subject has already been discussed, but i've made a quick search and got no answer...

My cooling fan wont start wen the car heats up...
Can it be a fuse???
Can anybody sugest other problems or tel me where is the fuse for the cooling fan..

Thank you in advance.

[Ashaman]

It could be a fuse, you will need to check as I don't have a manual in front of me at the moment (I believe they are located above the instrument cluster).

It could also be the sensor. It is located on the thermostat housing. It is a single spade-type connector. Try removing the lead and grounding it directly to the block to see if the fans run. If they do, you found your problem.

It also it is not unheard of for the fans to go bad, if you get to the point where you suspect that you can always apply 12V direct to confirm.

[JoPaS]

thank you.

I'll try it this weekend..

Hope i find out what's the problem.

The sun is cumming and I don't want to miss it...

[tango190]

I read earlier today that if the thermostat sticks closed, hot water does not get to the sensor to switch the fan on.

With Ashaman's answer and this bit of info you should be able to suss out what's what.

Let us know though, don't leave the thread incomplete, that would be a shame.

Cheers

Bob

[JoPaS]

I haven't had much free time these days so i've send the car to the dealer.
The car is back on the roads (ohhh the sun!! ).

It seems that it was just a smiple valve.. (i didn't understood witch) I tink he got it from Mazda cars..

Thank you all for your help.

sincerely,

João Paulo Ferreira

[ElanSteve]

Ah, an area I've explored recently!

As suggested the first step is to remove the connector from the switch on the thermostat housing and ground it directly.

If the fans come on you either have a stuck thermostat or a bad switch.
BTW, I've had to replace thermostats twice now and each time the "bad" thermostat still passed the "boiling water in a pan on the stove trick".

Also if your car has A/C the fans should come on when the A/C is turned on.

If the fans still do not come on. then you can inspect fuses. There are 3 fuses in the circuit, one for the supply to the fans relay (30A), and one for each fan individually (15A). Chances are if neither fan comes on it will be the main fuse or the cooling fan relay. The good news is the relay and the 15A fuses are above the instrument cluster, the bad news is the 30A fuse is in the maxi-fuse box on the tunnel top behind the dash.

Good luck.

Going off on a slight tangent, I recently discovered I only had one fan working. I was able to detect volatge all the way to the connector next to the fan so I figured the fan motor was shot. I found an exact replacement fan (Federal spec) but the connector was different and it did not have the series inductors I found on the original unit. While splicing in these inductors to the new fan I found the real cause of the problem - the connection from the thick copper wire of the inductor to the wire to the fan motor had corroded. Anyway the new fan was also slightly thinner so I continued with the replacement.

If anyone wants the part number for the replacement fan let me know and I'll look it up.

[dermotbell]

From previous experience on older Lotus cars, I found that the most common cause was the relay. Not the relay itself but that the connections had become slightly oxidized. A bit of fiddly sanding and everything was fine again.

Remember things could be worse, your better half could insist on watching BB8.

[router]

checking my fans today, it would seem that only one of the fans is working, would it be fair to assume that there is a dodgy connection somewhere?

[Ashaman]

It could be, if you have narrowed it down to the fan check the area Steve suggested; I had that exact failure as well.

It was a pretty simple fix; remove, resolder, re-shrinkwrap, re-install - done.