Warm Weather and.............

Dacman · 22nd May 2010, 16:44

The slow speed on the cooling fan gives up the ghost.

Is it still safe to drive? will the medium and high speeds still work?
Looks like ill be missing the AC

Will have to see if the windows work.
Looks like a phone call to Jules is on the cards

dac

T-Cut · 22nd May 2010, 17:07

So you have a 3-speed system? I guess the aircon is in constant use.

TC

Dacman · 22nd May 2010, 17:24

Hi Tcut

yes its the older 3speed type. I dont really use the AC, just now and again to keep it running. Its kind of how i noticed, i didnt hear the fan cut in. I presume the faster speeds are working as the car hasnt over heated (according to the guage)

dac

T-Cut · 22nd May 2010, 18:02

A previous owner maybe. The slow speed typically fails around 60k miles due to loss of a motor brush due to regular aircon use. The standard fix is a new fan unfortunately. Some have managed to replace the brushes but it's far from certain to succeed.

The temperature gauge is pretty meaningless actually. It won't move up until 115C+, so beyond fan territory.

TC

2Diesels · 22nd May 2010, 18:05

I'm afraid you'll have to use the SR270 back-up system to keep cool

Dacman · 22nd May 2010, 18:08

Idont suppose it not done bad at 115k. I just dont wanna drive it and the fan not work full stop and the car boil over.

ty for the replys tc

dac

Dacman · 22nd May 2010, 18:10

Quote:

Originally Posted by 2Diesels

I'm afraid you'll have to use the SR270 back-up system to keep cool

Hi Col, dunno bout a sr270, but i might have to use a d.a.d.s s40

stocktake · 22nd May 2010, 18:11

Hmmm, three speed fans, the brush that wears is the one on the black wire, this is the negative path for the slow and medium speeds. the top speed uses a second negative brush.

With this in mind when the slow speed fails, (unless it is the relay) then the medium speed also fails. You are then left with the top speed only. This will work untill the worn brush from the 1st negative throws it's self in to the motor as a final act of destruction.

After that the fan motor is scrap

2Diesels · 22nd May 2010, 18:13

Quote:

Originally Posted by Dacman

Hi Col, dunno bout a sr270, but i might have to use a d.a.d.s s40

Sun Roof 2front windows & 70MPH

Dacman · 24th May 2010, 18:41

Interestingly.............

Thought id use the onboard diagnostic to see what was happening to the coolant temp. On the way to work it held a steady 89-90.c
Got held up a bit on the final stretch and as i got into the work car park 108.c was the reading AND NO FAN!

It appears all 3 speeds have stopped working, ive checked the fuses and all seem ok. Think ill stop using the car till Jules's fan arrives.

dac

22nd May 2010, 16:44	#1
Dacman Loves to post MG ZT 160+ Join Date: Apr 2007 Location: Nottingham Posts: 435 Thanks: 0 Thanked 2 Times in 2 Posts	Warm Weather and............. The slow speed on the cooling fan gives up the ghost. Is it still safe to drive? will the medium and high speeds still work? Looks like ill be missing the AC Will have to see if the windows work. Looks like a phone call to Jules is on the cards dac

22nd May 2010, 18:02	#4
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	A previous owner maybe. The slow speed typically fails around 60k miles due to loss of a motor brush due to regular aircon use. The standard fix is a new fan unfortunately. Some have managed to replace the brushes but it's far from certain to succeed. The temperature gauge is pretty meaningless actually. It won't move up until 115C+, so beyond fan territory. TC Last edited by T-Cut; 22nd May 2010 at 18:06..

22nd May 2010, 18:11	#8
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,590 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Hmmm, three speed fans, the brush that wears is the one on the black wire, this is the negative path for the slow and medium speeds. the top speed uses a second negative brush. With this in mind when the slow speed fails, (unless it is the relay) then the medium speed also fails. You are then left with the top speed only. This will work untill the worn brush from the 1st negative throws it's self in to the motor as a final act of destruction. After that the fan motor is scrap __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

22nd May 2010, 17:07	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	So you have a 3-speed system? I guess the aircon is in constant use. TC

22nd May 2010, 17:24	#3
Dacman Loves to post MG ZT 160+ Join Date: Apr 2007 Location: Nottingham Posts: 435 Thanks: 0 Thanked 2 Times in 2 Posts	Hi Tcut yes its the older 3speed type. I dont really use the AC, just now and again to keep it running. Its kind of how i noticed, i didnt hear the fan cut in. I presume the faster speeds are working as the car hasnt over heated (according to the guage) dac

22nd May 2010, 18:05	#5
2Diesels Trader ZT 260SE, Connoisseur CDT Join Date: Mar 2009 Location: The Ancient Shire Of Bedlington Posts: 12,597 Thanks: 68 Thanked 506 Times in 305 Posts	I'm afraid you'll have to use the SR270 back-up system to keep cool

22nd May 2010, 18:08	#6
Dacman Loves to post MG ZT 160+ Join Date: Apr 2007 Location: Nottingham Posts: 435 Thanks: 0 Thanked 2 Times in 2 Posts	Idont suppose it not done bad at 115k. I just dont wanna drive it and the fan not work full stop and the car boil over. ty for the replys tc dac

24th May 2010, 18:41	#10
Dacman Loves to post MG ZT 160+ Join Date: Apr 2007 Location: Nottingham Posts: 435 Thanks: 0 Thanked 2 Times in 2 Posts	Interestingly............. Thought id use the onboard diagnostic to see what was happening to the coolant temp. On the way to work it held a steady 89-90.c Got held up a bit on the final stretch and as i got into the work car park 108.c was the reading AND NO FAN! It appears all 3 speeds have stopped working, ive checked the fuses and all seem ok. Think ill stop using the car till Jules's fan arrives. dac