fan control

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etldak

Member - Posts: 3

Joined: September 20, 2009

Location: Virginia, United States

Posted: September 20, 2009 at 8:25 AM / IP Logged

I need to know how to make this work. I have a oil cooler with a fan that has a thermal cuppler at comes on at a higher temp then i like it to. I would like to hook a switch so i can turn it on when i like to and sill have it hooked up to the cupler.

i am an idiot

Platinum - Posts: 13,672

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 20, 2009 at 9:01 AM / IP Logged

Do you know where the relay that powers the fan is located? Do you know if the thermocouple switches power or ground to the relay?

etldak

Member - Posts: 3

Joined: September 20, 2009

Location: Virginia, United States

Posted: September 20, 2009 at 9:39 AM / IP Logged

the thermocuple is power there is no relay its run right to the battery

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: September 20, 2009 at 9:43 AM / IP Logged

It it's an actual thermocoupler then there would have to be an interface, as thermocouples work down in the mV range.

Do you have a schematic of the system? Is this an OEM system or an aftermarket system?

Kevin Pierson

i am an idiot

Platinum - Posts: 13,672

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 20, 2009 at 9:47 AM / IP Logged

I am thinking that he has a thermal switch. How big is the fan and do you have any idea how much current it draws? If it is a small fan and you have room to mount a switch that will handle the current of the fan, simply apply fused power to one side of the switch. Connect the other leg of the switch to either the fan's power wire or to the output side of the thermal switch. both of these points are electrically the same, I just gave you 2 options incase one is much easier to get to than the other.

etldak

Member - Posts: 3

Joined: September 20, 2009

Location: Virginia, United States

Posted: September 20, 2009 at 9:57 AM / IP Logged

Its aftermarket fan draws 6 amps the the part on the box says thermocoupler but a thermal switch would make more sence.iI was tinking of runing off a switch to the output side but just dont wont to see smoke.

i am an idiot

Platinum - Posts: 13,672

Joined: September 21, 2006

Location: Louisiana, United States

Posted: September 20, 2009 at 10:17 AM / IP Logged

There will be no smoke.

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fan control

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