well this is my story. sorry its so long. i've been running an elect. fan from a v-8 cad on my camaro for about 2 years now. it cools good, and has worked well. problem was, i had a cheap mechanical t-stat that would run forever, and was just real inaccurate i felt. plus i never wired in an off switch, so it ran auto all the time. that was not a problem, but i wanted to shut it off before i made a pass, and couldn't. so, i decided to go with one of derales solid state fan switch/relay packages, liked the nice neat install it would provide. wired it all in, made it look all nice and pretty, but the thing so far works like crap. when setting the t stat i noticed if i just turned the adjustable pot it would come right on, and turn it the other way, it would turn right off. so far so good. but when just allowing it to turn on at the pre set temp by itself, the relay contacts would chatter like a mofo, but eventually pull in. sure it works, but i'm thinkin i'll need a box of relays everywhere i go, cause this going to trash them. so i call derale, and i actually get real decent tech support, and the guy figures, as did i, the relay must be bad, so he sends one out to me, no problem. he did show some concern about the fan i was using, since the unit/relay are only good for 30a. but i have been runing this fan for years now, with a 25a fuse, and never an issue. he said i may still need a larger relay, and to use the derale unit as a trigger. i'm thinking i could have just assembled my own set up with a t stat if thats the case, cause now we're talking so much for the "clean package, easy install". well i couldn't wait, so i went and got another 30a relay from the parts store, tried it, and same thing [img]graemlins/angry.gif[/img] . so i'm not sure what the best solution is now, just find a bigger relay and use the derale to trigger it, or just start over, that seems like the easiest clean solution at this point. i don't think its the relay myself, because it holds fine when switched manually. i'm thinking some problem with the internals on the switching. anyone dealt with the derale fan switches? also, if your reading this chicane, you had a link to a wiring diagram for the lincoln fan set up, but i couldn't find it, if you could put up a link to it, i'd appreciate it. i'm thinking about just doing it that way now. this is pi$$ing me off, i'm a freakin' electrician, i have set up auto start stops with plc's and vfd drives on 1000 horse motors, but this stinkin' little fan is kicking my ***! any input would be greatly appreciated, thanks [img]graemlins/beers.gif[/img]
1968 rs with an old school 354" SB2.2 pump gas motor.
Repetition does not transform a lie into a truth.
Franklin D. Roosevelt