Engine Cooling Fans

[fossie]

So what controls the fans coming on then according to the temp - is it the fanswitch on the rad?

 

[gazR]

Yeah, that's right, the NIME box only works when the aircon is on.

TBH I have the aircon on most of the time so isn't an issue for me.

wish id known this before buying one. so its either the resistor mod or new fans then

 

[SubZero]

Yeah, that's right, the NIME box only works when the aircon is on.

TBH I have the aircon on most of the time so isn't an issue for me.

From my understanding, that is incorrect. The NIME box and the resistor mod have the same principle, and that is to replace the burnt out resistor in the fan unit. The thermoswitch controls the fans according to engine coolant temperature, and this also activates the slow speed fan at temps of around 92-97°C. Therefore even if aircon is off, slow speed may be required, and the fans will only work on slow speed if the burnt out resistor is replaced by the mod, or the NIME box.

 

[fossie]

Where is the thermoswitch?

 

[LEE69]

on the radiator

 

[fossie]

on the radiator

Is that just the fan switch Lee?

 

[LEE69]

That is the switch, gets to a certain temp, it put the fan(s) on

 

[fossie]

You know the part number by any chance for a Cupra 180. Apparently there's 4 to choose from. Or one of your magical eBay links lol

 

[LEE69]

Might be this http://www.ebay.co.uk/itm/VW-RANGE-...rParts_SM&hash=item27bba2a533#ht_13331wt_1166

 

[LEE69]

yeah same part number 1H0959481B

 

[fossie]

Effing legend. Cheers dude

 

[SubZero]

GSF also have one in their eBay shop:

http://www.ebay.co.uk/itm/Radiator-...rParts_SM&fits=Model:Leon&hash=item45ff12ecd3

 

[gazR]

from matt who makes the NIME boxes:

"The accurate description is that the NIME unit replaces the faulty resistor pack. The actual conditions for on/off/slow mode are the same, as these are controlled by the cars fan controller unit."

therefore if they arent spinning slow when the engine gets warm, then the fan controller unit isnt getting the signal, so must be a duff thermoswitch?

 

[Gnollins]

from matt who makes the NIME boxes:

"The accurate description is that the NIME unit replaces the faulty resistor pack. The actual conditions for on/off/slow mode are the same, as these are controlled by the cars fan controller unit."

therefore if they arent spinning slow when the engine gets warm, then the fan controller unit isnt getting the signal, so must be a duff thermoswitch?

Don't know - but what I do know is that in the 4 years I've had the Nime box fitted, the fans never spin when the aircon is off!

I would be interested to know if there's something else I need to fix...

 

[SubZero]

Thermoswitch or also known as the radiator fan switch. Costs about £12 for the part.

http://www.ebay.co.uk/itm/Radiator-...rParts_SM&fits=Model:Leon&hash=item45ff12ecd3

 

[Gnollins]

Is it easy to swap out?

 

[LEE69]

You will loose coolant unless you drain it from the tap at the bottom of the rad

 

[Gnollins]

You will loose coolant unless you drain it from the tap at the bottom of the rad

Cheers, that's no problem. Is it obvious where the switch is (at work without my motor today ) ?

 

[LEE69]

Yeah very

 

[Gnollins]

Yeah very

I had a good look around the engine bay earlier and couldn't find anything that looked like the part on Ebay. Can someone point me in the right direction?

Can I change this without getting under the car?