Wiring fans direct with a Fan switch (no relay switching)

[boXXer]

has anyone had a problem wiring fans THROUGH a fan temp switch at all?

 

ive recently wired up my cossie fans, with a direct power source to battery, through a fuse, then into the fans, and on the earth side it goes out of the fan plug, straight into the fan switch, then from the switch onto a good earth point.

 

Now, they worked fine for one day, and now the switch doesnt work, have i killed it? im doing the same with my mk2 without any problems.....

 

the fans work if you bridge the fan switch wires so the circuit is working fine.

[Mr Sam]

sounds like a faulty switch if they are spooling up when you bypass the switch

 

if your not using a relay maybe the high voltage draw has fried it?

[boXXer]

but its on the earth side and i didnt think you could overload a earth?

[Vista]

It still has the full current flow through it and probably isn't rated to take it.

 

Mine also runs directly through the switch, I did have to fit a new switch about 4 years ago but it's been fine ever since.................only a single fan though.

[Ken B]

I have a Pacet Profan on my Anglia van, you need to use a relay. The current draw just kills them. They're not made from quality materials anymore. I had both Intermotor and CCI. Both got fried. Fitted relay no problems since.

[boXXer]

its got twin fans so i think the current draw has nailed it.

[JP.]

25 amps relays atleast, 40 amps relays prefered. When fans start up they'll take peak current thats why I recommend 40 amps relays. Don't have to fuse it 40 amps but the relays will live longer as its 40 amps rated.

 

Id say ( experiance ) twin fans, twin relays. Its also fail save too this way, if one system fails there's still one system that brings you home.

 

My 50 cents.

[boXXer]

thanks!

[Savvi]

I've replied to your thread on Ts mate ........... also got the tracker prices which i text'd you ?