On Temp For Thermo Fan

[mrsr32]

what temp does everyone have their thermo fan switch on/off at?

my sensor is in the top radiator hose so I'm assuming it would read higher than if it was in the lower

[blind_elk]

You can set it quite high. If it were mine, I would be setting it around 90 or even 95. After all, it only needs to work while the car is stationary, or moving very slowly. Any other time, the motion of the car forces sufficient air through the radiator to keep the engine at correct (thermostatted) operating temperature.

[xntrq]

  On 14/04/2013 at 3:39 AM, blind_elk said:

You can set it quite high. If it were mine, I would be setting it around 90 or even 95. After all, it only needs to work while the car is stationary, or moving very slowly. Any other time, the motion of the car forces sufficient air through the radiator to keep the engine at correct (thermostatted) operating temperature.

How can this be set? I want to keep mine on constantly so my A/C works when in ACC power

[mrsr32]

mine is done via ecu. you can rewire the blower fan to come on with the a/c instead of only coming on when it gets really hot

[jjman]

Iv set mine at a temp that i know it will be able to turn off again.

Essentially, unless it is pretty cold weather, you will struggle to get ur thermoswitch for the fan(s) to switch off if it is set for under about 88degrees (as the sensor is in the hose n also runs on a long probe it seems to be a bit delated in its reactions iv noticed).

Otherwise, the blower fan should come on when you turn your AC on (at least it does in R33's).

Honestly, the only way iv managed to get the thermofan setup to do what it is desired to do (work only when it needs to and otherwise be off when it doesnt, freeing up response and horsepower that the clutch fan otherwise always draws) is to have a manual switch in the cab. That way you can turn it on when you are going to be moving slowly in traffic or if it is otherwise a hot day and/or using your AC. Otherwise the thermofans will always be catching up on itself- that is, not turning on until you have sat in traffic for a few minutes and the temp goes up to the switch point and then it actually has to try and pull excess heat out of the system...

While iv got this manual swtich and am happy to use it like this it would otherwise be a pain in the ass for most people. So really the only way to do thermofans properly would be to set up a window switch that would turn the fans on; 1) at less than 50km/h. 2) when the AC is on/ more than 30 degrees ambient outside.