cdti cooling fan - Page 2

SD1too · 22nd June 2021, 16:32

The circuit board is not available.
When the circuit board fails it doesn't exhibit the symptoms your car has. Your symptoms are a classic case of a failed silver resistor. It's a cheap and straightforward repair.

Simon

Arctic · 22nd June 2021, 16:43

Quote:

Originally Posted by david2000

hi to all
i have a fan assembly and there is only high speed now it has a silver resistor now i want to know if i change the resistor and it still does not work i then change the relays which are available and it s

Quote:

till does not work is the circuit board available if the circuit board is not available then it would be better to look for another working fan
david

Hi David.
No the board is not available, but what is available is a man called French Mike

whom will repair the board for you if you post it out to him, i have at least four at the moment i need to send over to him, so don't worry get that gold resistor change over first.

1

stocktake · 22nd June 2021, 16:44

Use a multimeter to test the resistance of the silver resistor. If it is open circuit then it has failed or...
If you bridge the resistor out and carry out the demist test the fan should start on high speed, if it does then you have proved the resistor was at fault

david2000 · 24th June 2021, 19:38

hi to all
last night i took the relays off to test and all three relays passed so i checked the circuit board and there was 12volts going in and out of the main relay put there was only power going to one of the smaller relays so i contacted french mike and he told me to post the circuit board to him and he would have a look he sent me his address so i posted the circuit board off to him today i will keep you posted
david

RayH · 24th June 2021, 23:14

Quote:

Originally Posted by david2000

hi to all
last night i took the relays off to test and all three relays passed so i checked the circuit board and there was 12volts going in and out of the main relay put there was only power going to one of the smaller relays so i contacted french mike and he told me to post the circuit board to him and he would have a look he sent me his address so i posted the circuit board off to him today i will keep you posted
david

Would that be the relay that went to the resistor by any chance?

david2000 · 25th June 2021, 21:13

hi to all
not sure
david

RayH · 25th June 2021, 21:43

Quote:

Originally Posted by david2000

hi to all
not sure
david

Then check it out first.
It is your most likely cause of the problem.

22nd June 2021, 16:32	#11
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	The circuit board is not available. When the circuit board fails it doesn't exhibit the symptoms your car has. Your symptoms are a classic case of a failed silver resistor. It's a cheap and straightforward repair. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

22nd June 2021, 16:44	#13
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,586 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Use a multimeter to test the resistance of the silver resistor. If it is open circuit then it has failed or... If you bridge the resistor out and carry out the demist test the fan should start on high speed, if it does then you have proved the resistor was at fault __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident Last edited by stocktake; 26th June 2021 at 11:30..

24th June 2021, 19:38	#14
david2000 Loves to post Rover 75 Tourer Join Date: Dec 2007 Location: Ammanford Posts: 485 Thanks: 248 Thanked 29 Times in 24 Posts	hi to all last night i took the relays off to test and all three relays passed so i checked the circuit board and there was 12volts going in and out of the main relay put there was only power going to one of the smaller relays so i contacted french mike and he told me to post the circuit board to him and he would have a look he sent me his address so i posted the circuit board off to him today i will keep you posted david

25th June 2021, 21:13	#16
david2000 Loves to post Rover 75 Tourer Join Date: Dec 2007 Location: Ammanford Posts: 485 Thanks: 248 Thanked 29 Times in 24 Posts	hi to all not sure david