Fan stays on

[curtisgrace606]

So u think the solenoid in the relay is stuck open?

[crazyrog17]

You grounded it to the head and it stopped, so that says the relay is working. The temp sensor is faulty, it doesn't provide the relay with a path to ground so the fan never stops.

[curtisgrace606]

Thanks for the info man, u really helped me out.

[TorqueEffect]

Yeah, I have had a sensor where it would provide a ground, but would never kick the fan on.

Those are scary, I didn't even know it until the needle kept climbing in bumper to bumper traffic moving at a snail's pace.

[festygramps]

That's why I like manual fans. Watch the temp gauge and kick it on when you need it. Helps me stay awake too.

[curtisgrace606]

I'm not so sure my temperature gauge works. Goes about a quarter of the way and stays there. I was waiting till I got the fan fixed to see if that helped.

[festygramps]

Mines the same way. I just turn on the fan when I'm sitting in traffic. I have another car with a digital gauges. I changed it over to a manual fan too. It's nice to have good gauges. I'd like to find some digital gauges for my festiva. At least oil pressure and engine temp. I've had so many old cars I don't like trusting the old needle type gauges.

[bravekozak]

Now I'm confused again. The 89 EVTM shows both the switch and fan normally open for the carb and the EFI. Yet, there is a different diagram in the 89 shop manual. Oh well.

[festygramps]

That's why I went manual. Sensors are great until they don't work. People can call me crazy (and many do), but I'm a big keep it simple kind of guy. An on/off switch works, every time. Just have to pay a little more attention to what's going on. I've had cars from the 50's thru the 2000's and I've found the old simple systems are the best.

[curtisgrace606]

Does anybody know where on the temperature gauge the fan kicks on? I twisted my sensor and the fan quit. I was hoping it got ground. I let the motor warm up to the line before the red and no fan. I twisted it the other way so the fan would stay on continuously and let it cool back down.

[festygramps]

I thought your guage wasn't reliable. I really don't think anybody pays attention to where on the gauge the fan kicks in. It should kick on a little over 200 degrees. But where is that on a needle gauge? If the fan keeps running when you shut down the car, pull the fuse. Just remember to put it back in when you take off again. In the sort term you're better off if the fan runs all the time. Better too cool than too hot to a point. But a car running too cool will ruin the seal between the pistons and the cylinder walls eventually because you will run too rich. Then you have a problem with blow by. It's what I call dumping fuel. Too much gas is coming in and it will contaminate your oil, washing away the ring/cylinder seal. I understand where you're comming from. Sometimes you just have to risk it. If you have to be somewhere you don't have any choice. Run it cool and hope it works out. I've done that sort of thing many times, and it has worked out most the time. But it really sucks when it doesn't.

[curtisgrace606]

That's the first time I've ran it without the fan on and the temperature gauge seemed to be working. I was thinking about running a ground wire with a toggle switch that way I could turn it on when it needed to. I just wasn't sure where that was on the gauge .

[festygramps]

Running a switch for the fan is not hard. I'm more than willing to help you with it. But I can't do that until Saturday. If you have to use the car Friday then run it cool. Too hot is a really bad thing. Heads like to warp when they get too hot. We need to connect by phone and I'll walk you thru how to manually switch the fan. It's no big deal. Luckily these are tough little cars.

[getnpsi]

http://veisystems.com/products/categ...%20(Fahrenheit)

check yourself before you wreck yourself

[crazyrog17]

My gauge reads just below half when the fan kicks on.

The fan shouldn't run after you turn it off and take the key out, the ignition switches power to it. Just let it run until you get a new (even junkyard, or from here) switch. Heck I think I have one on my junk motor for you.

Make sure you have coolant to put in after you lose some when the old switch comes out. Good time for a cascade flush anyways.