Another CDTi Cooling Fan Problem

GBCB1986 · 21st August 2019, 14:06

My car is an 04 plate car with a three speed fan. Since I purchased the car the cooling fan has never worked even if the AC is switched on. I bought a brush set and fitted them yesterday. Success fan now runs.......all the time at low speed and for about half a min after the key is taken out!!!

I dismantled the motor again to make sure I han't shorted anything, all good. I checked all the relays, again all in good working order.

I'm now stuck for ideas, any suggestions welcome.

Cheers,

Graham.

T-Cut · 21st August 2019, 16:22

Seems the only thing you haven't checked is the printed circuit board - not that you can check them that easily. It's often a process of elimination.

It's a weak part of the diesel system, so a chat about that may be worthwhile. You can get boards fixed by FrenchMike here on the forum.

TC

GBCB1986 · 21st August 2019, 16:25

Thanks for that. I was beginning the think it was the pub.

SD1too · 21st August 2019, 18:53

Quote:

Originally Posted by GBCB1986

... fan now runs.......all the time at low speed and for about half a min after the key is taken out!

Just to confirm Graham, is this with the heating/air con. in 'AUTO' or 'ECON' mode?

Simon

GBCB1986 · 22nd August 2019, 18:45

This is when the ac/heating is off. When the a.c. is you hear the fan sound change, press econ it slows down again.

SD1too · 22nd August 2019, 20:05

Thanks for your reply Graham. I'm afraid I need more clarification:

Quote:

Originally Posted by GBCB1986

This is when the ac/heating is off.

Do you mean that you've pressed the 'OFF' button on the top row, far left hand side?

Quote:

When the a.c. is you hear the fan sound change, press econ it slows down again.

This sentence seems to be missing some words. "When the a.c.... " is what?

Simon

GBCB1986 · 22nd August 2019, 20:27

Sorry, yes when I have pressed the ATC off button and the engine coolant temp is cold the fan is running on low speed.

When you press the auto button, the fan speed increases. Press the econ button and the fans speed reduces.

SD1too · 22nd August 2019, 21:51

Quote:

Originally Posted by GBCB1986

... when I have pressed the ATC off button and the engine coolant temp is cold the fan is running on low speed.

Does the coolant temperature gauge rise to 'normal' when driving, i.e. does it reach the nine o'clock position?

Simon

GBCB1986 · 23rd August 2019, 00:09

Yeah, bang on 9 o'clock. When I put the coolant temp on the trip display it is always around 82 to 85 degrees C.

SD1too · 23rd August 2019, 07:49

Thanks for all the information Graham. Well, with the air. con./heating in 'ECON' mode and a coolant temperature in the eighties the radiator fan should not be running. It does indeed sound as if your printed circuit board has developed a fault.

Second-hand spares are very thin on the ground but, as already mentioned, FrenchMike has in the past successfully repaired them for members. This does involve you sending it to France though!

Oh, just one thing; your ECM isn't sitting in any water is it?

Simon

21st August 2019, 14:06	#1
GBCB1986 Avid contributor Ford Kuga Join Date: Dec 2016 Location: Stafford Posts: 116 Thanks: 41 Thanked 12 Times in 9 Posts	Another CDTi Cooling Fan Problem My car is an 04 plate car with a three speed fan. Since I purchased the car the cooling fan has never worked even if the AC is switched on. I bought a brush set and fitted them yesterday. Success fan now runs.......all the time at low speed and for about half a min after the key is taken out!!! I dismantled the motor again to make sure I han't shorted anything, all good. I checked all the relays, again all in good working order. I'm now stuck for ideas, any suggestions welcome. Cheers, Graham.

23rd August 2019, 07:49	#10
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	Thanks for all the information Graham. Well, with the air. con./heating in 'ECON' mode and a coolant temperature in the eighties the radiator fan should not be running. It does indeed sound as if your printed circuit board has developed a fault. Second-hand spares are very thin on the ground but, as already mentioned, FrenchMike has in the past successfully repaired them for members. This does involve you sending it to France though! Oh, just one thing; your ECM isn't sitting in any water is it? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

21st August 2019, 16:22	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,752 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Seems the only thing you haven't checked is the printed circuit board - not that you can check them that easily. It's often a process of elimination. It's a weak part of the diesel system, so a chat about that may be worthwhile. You can get boards fixed by FrenchMike here on the forum. TC

21st August 2019, 16:25	#3
GBCB1986 Avid contributor Ford Kuga Join Date: Dec 2016 Location: Stafford Posts: 116 Thanks: 41 Thanked 12 Times in 9 Posts	Thanks for that. I was beginning the think it was the pub.

22nd August 2019, 18:45	#5
GBCB1986 Avid contributor Ford Kuga Join Date: Dec 2016 Location: Stafford Posts: 116 Thanks: 41 Thanked 12 Times in 9 Posts	This is when the ac/heating is off. When the a.c. is you hear the fan sound change, press econ it slows down again.

22nd August 2019, 20:27	#7
GBCB1986 Avid contributor Ford Kuga Join Date: Dec 2016 Location: Stafford Posts: 116 Thanks: 41 Thanked 12 Times in 9 Posts	Sorry, yes when I have pressed the ATC off button and the engine coolant temp is cold the fan is running on low speed. When you press the auto button, the fan speed increases. Press the econ button and the fans speed reduces.

23rd August 2019, 00:09	#9
GBCB1986 Avid contributor Ford Kuga Join Date: Dec 2016 Location: Stafford Posts: 116 Thanks: 41 Thanked 12 Times in 9 Posts	Yeah, bang on 9 o'clock. When I put the coolant temp on the trip display it is always around 82 to 85 degrees C.