Cupra R Fan Issue

[Chrismawa]

My slow speed on my fans doesnt seem to be working as when I put on the AC the fans do not spin. The fast speed of the fans is working though. Is there some kind of test I can do running a wire between to points to test if this truly is the resistors inside the fan that's broke?

Thanks.

 

[Alexis27]

Well, that is THE classic symptom and they'll go one day anyway if they're the original fans.

Easiest way is the wire in the NIME box to fix it

Fan Speed Controller 1 – Nime Shop

shop.nime.co.uk

 

[Chrismawa]

Well, that is THE classic symptom and they'll go one day anyway if they're the original fans.

Easiest way is the wire in the NIME box to fix it

Fan Speed Controller 1 – Nime Shop

shop.nime.co.uk

Thanks, I have no idea what that does? Not much of a description.

Found this great video that demonstrates the test I was after.

 

[Alexis27]

Sorry, more info here:

Welcome to Nime Consulting

IT Consultancy specialising in Enterprise, Web, Business Intelligence and Integration

www.nime.co.uk

Welcome to Nime Consulting

IT Consultancy specialising in Enterprise, Web, Business Intelligence and Integration

www.nime.co.uk

 

[Chrismawa]

Sorry, more info here:

Welcome to Nime Consulting

IT Consultancy specialising in Enterprise, Web, Business Intelligence and Integration

www.nime.co.uk

Welcome to Nime Consulting

IT Consultancy specialising in Enterprise, Web, Business Intelligence and Integration

www.nime.co.uk

Thank you, thats interesting.

I think though if it's the fans, I'll just replace them with new from Euro Car Parts, as have seen others have done with success. The car is a toy so does limited mileage, so I'm sure they would be good enough.

 

[Chrismawa]

I've just tested the fan switch plug. Jumping the low speed pin and the fans are dead. Jumping the high speed pin and they work. Does this basically mean the resistors in the fans are broke?

 

[mty12345]

I've just tested the fan switch plug. Jumping the low speed pin and the fans are dead. Jumping the high speed pin and they work. Does this basically mean the resistors in the fans are broke?

Yeah either broken or the connections have failed, either way EuroCarparts replacement is probably the best option.

High speed is basically 'direct drive' so to speak, no resistors used.

Low speed is acheived by diverting the same connection through a couple of large resistors prior to the fan, which has the effect of slowing it down.

 

[Chrismawa]

Yeah either broken or the connections have failed, either way EuroCarparts replacement is probably the best option.

High speed is basically 'direct drive' so to speak, no resistors used.

Low speed is acheived by diverting the same connection through a couple of large resistors prior to the fan, which has the effect of slowing it down.

Thank you.

Looking on Euro Car Parts they have 2 fans listed, which im presuming is the large and small fan. However the small one states in the description "for without ac". Can anyone confirm these are the correct fans? Pics below of each item.

 

[Connor H]

the common fix for this is to add an external resistor in, i havnt done it, but i have a spare rad/.fan pack here with that fix applied.

 

[g60stu]

Thank you.

Looking on Euro Car Parts they have 2 fans listed, which im presuming is the large and small fan. However the small one states in the description "for without ac". Can anyone confirm these are the correct fans? Pics below of each item.

View attachment 32032


View attachment 32033

I assume you fitted fans in the end? Could you confirm the euros part numbers if you still have the paperwork??

 

[g60stu]

I was stuck in traffic the other day and noticed the coolant temp rising above normal. I turned ON the A/C and that got the temp back to normal. I just checked the fans just now - with the A/C on it looked like both were runing at LOW speed. With the a/c off no fans were running. could I have a different issue to the usual resister problem?

 

[Alexis27]

Your fans sound fine. Might be worth sticking a new coolant temp sensor in.

 

[mty12345]

I was stuck in traffic the other day and noticed the coolant temp rising above normal. I turned ON the A/C and that got the temp back to normal. I just checked the fans just now - with the A/C on it looked like both were runing at LOW speed. With the a/c off no fans were running. could I have a different issue to the usual resister problem?

Sounds like it's something different, as the resistors only work on low speed, so if they fail then low speed doesn't work, and you only get the high speed working when the car gets to 98C

Might be worth replacing the coolant sensor as Alexis said, but the fact that it happened it traffic would make me think the engine was actually getting hot. If it happens again then it may be worth popping the bonnet and checking if the fans are running. There is a thermostatic type switch screwed into the back of the radiator, it's possible that is starting to fail and not telling the fans to switch on early enough.