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Discussion Starter #1
Hi folks my electric fan comes on as soon as I turn the key (previous owner) which is annoying to say the least, I've seen thermostat ones that screw into the inlet manifold and get wired to the fan, is this easy enough to do??

Can anyone who has this set up recommend a kit?

Regards Stuart

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Discussion Starter #2
Hi folks my electric fan comes on as soon as I turn the key (previous owner) which is annoying to say the least, I've seen thermostat ones that screw into the inlet manifold and get wired to the fan, is this easy enough to do??

Can anyone who has this set up recommend a kit?

Regards Stuart

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I was thinking of one something like this one, I take it my current power cable to my electric fan would go on the terminal on the thermostat!??


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Discussion Starter #4
yes you can use that.i use simular ones on everything here,

dont forget to put in an over ride switch
OK cool thanks, not sure what you mean by a override switch is that a relay??

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A couple of questions;

1. fan runs when ign on - constantly? or just when hot?
2. how is the fan switched at present - or is it on permanently?

160 degrees is too cold, you need a minimum of 180 to 190 to burn off the soot on your valves and have an efficient burn in the engine.
An override switch it to manually force the fan on in case the switch fails or if you want extra cooling (like in a traffic jam) this is a switch with a relay to power the fan.
 

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Cheers never seen one like that tbh, what temp setting do you set on the dial??

I've noticed when running my truck it sits around 160f

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I've got a 180 deg thermostat and the fan is set around the same temp so it runs around 180-185 degrees. I did have a 190 deg in it but it tended to get too hot on hot days with not much leeway.
 

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I just have mine wired with that sensor thing with ignition on.

I have deleted the optional switch to turn fan on early as you see a traffic jam looming but that's a load of cobblers. If it overheats in traffic it's an issue to resolve really. Imo My early on switch backfed and if left switched on the engine wouldn't stop when ignition switched off. Google says it can happen and is backfeeding!? My mot guy rang me saying he couldn't shut the bloody car down lol (he switched it on )
 
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Discussion Starter #10
A couple of questions;

1. fan runs when ign on - constantly? or just when hot?
2. how is the fan switched at present - or is it on permanently?

160 degrees is too cold, you need a minimum of 180 to 190 to burn off the soot on your valves and have an efficient burn in the engine.
An override switch it to manually force the fan on in case the switch fails or if you want extra cooling (like in a traffic jam) this is a switch with a relay to power the fan.
The fan is on as soon as I turn the key only way to turn it off is to turn off the truck!!!

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Ok, that's wired wrong then.

I would recommend the link for the adjustable stat. You want that adjustable stat wired to ignition (via a relay) so the stat controls when the fan kick in & shuts off.

You also have an override switch,the override is for if the adjustable unit fails or if you are in heavy traffic jams where fan is cutting in and out, you can leave the fan on constant to stop the heat/cool/heat/cool cycle until the jam eases up.
 

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Discussion Starter #13
This is my early circuit if you can read it ok. I updated it later on by removing the 40A breaker & adding in a relay controlled by ignition in its place so fan shut off with ign off (diagram showed it running with ign off until engine cool).

Perfect cheers makes sense to me

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Since updated my reply with the correct circuit diagram.
First relay controls battery power feed to fan thermo switch via ign.
second relay (on rad) is there to provide an earthed switched override (this prevents Timbo's backfeed problem).

Basically the rad mounted relay is a manual copy of the thermo switch in series with it.
 
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