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Radiator fan - constantly full blast

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Old 09-05-2006, 04:34 PM
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Radiator fan - constantly full blast

Hi guys,

I got a situation that's driving me nuts and mileage down. I recently swapped engine and have everything put together, now when start the car the radiator fan kicks on at full blast and won't stop for anything. It's goes on full blast with or without A/C.

I did change out the t-stat and bled the system, although not that well. I'll have to bleed it again with the heater on and what not. I also read that the fan swith/nut or whatever, between the IM and the Valve cover can be the prob.

Anyways, I would very much appriciate all and any input, advise comments you guys can offer. I was hoping for a trouble free maxima for a long time, but I guess it wouldn't be fun having a trouble free car . Thanks in advance.
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Old 09-05-2006, 04:38 PM
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I know on a vg, if the temp sensor is unplugged it'll run.
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Old 09-05-2006, 05:53 PM
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Originally Posted by therealgoon9
I know on a vg, if the temp sensor is unplugged it'll run.
same on ve and if i'm not mistakin, all cars. play with the red harness (unplug, replug, wiggle) see if she turns off.
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Old 09-05-2006, 07:51 PM
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check for codes. IIRC, the temp sensor is a code 13.

either you disconnected the sensor or the sensor is bad

they are about $20 and take about 5 minutes tops to replace.
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Old 09-05-2006, 09:34 PM
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whats wrong with full blast haha
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Old 09-06-2006, 09:45 AM
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Well guys problem solved, played with the temp sense, plugged and plugged it back in. If I push in too hard it will stay on constantly, so I eased it in and to make sure it works I turned on the A/C and the fans comes on. Although it did come at a small price, I managed to brake one of the plastic sides that holds it in place.

Makes driving so much easier especially with a 5spd. sooo much smoother.

I want to thank you guys for taking time out and helpin me gettinit dun.
As always, I've said it before and I'll say it again, Ya'lls teh best
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Old 09-07-2006, 05:41 AM
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Anyone help a newbie out with a location of the temp sensor? My 90 SE is doing the same thing...fan runs full blast all the time. Thanks!
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Old 09-07-2006, 05:55 AM
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Originally Posted by Majik
Anyone help a newbie out with a location of the temp sensor? My 90 SE is doing the same thing...fan runs full blast all the time. Thanks!


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Old 09-07-2006, 12:17 PM
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Awesome...thank you very much...I'll check that out tonight!
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Old 09-07-2006, 12:57 PM
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Originally Posted by MyGreenMax94
where were you when they compiled the service manual?
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Old 09-07-2006, 01:10 PM
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Originally Posted by Hectic
where were you when they compiled the service manual?
Driving a markIII turbo supra...
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Old 09-08-2006, 02:49 AM
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well after checking it out last night, my wire was completely unplugged from the sensor, and the plastic clip is completely busted. After plugging it in, in a few minutes, the fan went off, then stayed off for a minute then back on, but never cycled off again. I'm thinking I will need to replace that sensor.
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Old 09-09-2006, 12:10 PM
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It could be that there is crud between the connections. You should try to clean it out with some electrical cleaner and get a toothpick or paperclip to scrape some of that residue off. I had a similar problem on my Max, an it's just the connection not being firm/solid/good/etc.

But hey, if it ain't broken, why try to break it again?

Good luck.


Originally Posted by Maxmus_X
Well guys problem solved, played with the temp sense, plugged and plugged it back in. If I push in too hard it will stay on constantly, so I eased it in and to make sure it works I turned on the A/C and the fans comes on. Although it did come at a small price, I managed to brake one of the plastic sides that holds it in place.

Makes driving so much easier especially with a 5spd. sooo much smoother.

I want to thank you guys for taking time out and helpin me gettinit dun.
As always, I've said it before and I'll say it again, Ya'lls teh best
super32 is offline  
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