Fan scwitch Temp.


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grandpa
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Fan scwitch Temp.

Post by grandpa »



1978 Intertate.
I have e problem with my fanswitch. When I short the switch the fan is running. Problem is the switch. Even if i put it into boiling water the switch will not close. Can someone tell me the temperatur where the switch close?
Grandpa


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dingdong
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Re: Fan scwitch Temp.

Post by dingdong »

The fan on temp is 208/216F (98/102C) so boiling water (100C) may or may not be high enough. You might try heating some motor oil which has a much higher boiling point and measuring that the temp gets past 216F (102C).
Last edited by dingdong on Mon Sep 30, 2013 10:52 am, edited 2 times in total.
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WingAdmin
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Re: Fan scwitch Temp.

Post by WingAdmin »

The switch should close at between 98 and 102 degrees C (208 to 216 F), then open again when cooled to between 93 and 97 degrees C (199 to 207 F). Because your boiling water will never get above 100C/212F, it's quite possible that your switch is within spec, but not getting hot enough. If you are at a high altitude, it will boil at even less than that temperature.

Try pouring some antifreeze (i.e. engine coolant, ethylene glycol) into the pot instead of (or in addition to) water. This will allow you to get the temperature above the point where the switch should close without boiling, so that you can test it accurately. Just don't use the pot for food afterward. :)
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grandpa
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Re: Fan scwitch Temp.

Post by grandpa »

Thanks to bot of you. I did not know the temperatur was so high. I will try with oil or antifreze.
WINGADMIN. I am at Greenland at the moment so it could a posibility to use the water for drinking so I get antifreze in my blood :D

No for sure dont use the water afterwards for any kind of food nor the pot. :evil:

Thanks again
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Placerville
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Re: Fan scwitch Temp.

Post by Placerville »

I have a question. I'm assuming your fan wasn't coming on when you felt it should (according to your temperature gauge) or, it wasn't coming on at all. Correct? So, you've done the next logical thing by shorting your fan switch wires together (thus by-passing your fan switch) to see if your fan kicked on, and it did. So, now that you've proven your fan switch to be defective, why are you testing it? Why not just replace it? Am I missing something?
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grandpa
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Re: Fan scwitch Temp.

Post by grandpa »

Hi Posterville. I do understand that you are a little confused. I know the problem is the switch and I am going to replace it. But I have 3 more used switches and insted of install them to check them, I want to check them before. And if some of them does not work, out.

First I put 12 volt direct on the fan, it worked, the failure could be either the wiring or the switch. Then I shorted the switch, the fan worked, failure: the switch, then I have to find a switch which works.

grandpa


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