I keep replacing thermostat

[jfever71]

Ok after I got this truck seven months ago I redid the thermostat system. I put three relays one for each of the two fans and the third relay for a switch to turn the fans on. For the last four months I have not had any problems. Then about two weeks ago i turned the a.c. on and the fan stayed on after the ac the fan would not turn off. So i replaced the thermostat switch and it worked again for two weeks and then today i turned the ac on and it did the same thing. I keep breaking the thermostat switch. Any ideas how to fix this? Am i over loading the switch, should i put another relay between the switch and the relay and the fans?

 

[Terrible03]

Info on the truck would be helpful ....


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[jfever71]

What else do you need i have almost everything in my sig. Its a 350. I have been using zirgo switch thermostats. And i have the switch between the two rear passanger side spark plugs. Im thinking of a differnt location because it might be getting to hot between the exhaust manifolds?
http://www.amazon.com/gp/aw/d/B000UI762W/ref=mp_s_a_1_1?qid=1398121465&sr=1-1&pi=SY200_QL40

 

[Terrible03]

Sorry using tapatalk app to read forum, doesn't show signatures.


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[thz71]

What else do you need i have almost everything in my sig. Its a 350. I have been using zirgo switch thermostats. And i have the switch between the two rear passanger side spark plugs. Im thinking of a differnt location because it might be getting to hot between the exhaust manifolds?
http://www.amazon.com/gp/aw/d/B000UI762W/ref=mp_s_a_1_1?qid=1398121465&sr=1-1&pi=SY200_QL40

Most of us cant see your sig on tapa so any info at all would help

sent from my outdated S3

 

[jfever71]

Heres were it has been.

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This is were im trying to get out this plug to try here.

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[jfever71]

Damn i cant get out that plug.

 

[Terrible03]

I'd say you're on to somethin with moving the location.


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[jfever71]

Yea but the only other plug hole is on top of the intakecand i can't get it out.

 

[jfever71]

And the weird thing is the switch seems to only failed after i had the ac on.