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2nd February 2020, 21:11 | #1 |
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mg Join Date: Jun 2015
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fan never works
hello...
can someone please ensure where my problem lies??? my fan never works, i hear the motor sometimes making a buzz after shutting the engine off for 10 seconds or so. but never see the fan acctually working... can anyone advice me where the problem lies exaqly??? thanks to all |
3rd February 2020, 10:01 | #2 |
I really should get out more.......
Rover 75 connoisseur se v6 auto Join Date: May 2014
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Will depend if you have a 2 speed or earlier 3 speed fan -
go to the front of the car - look through the grill to the right and see if on front of the fan to see if you have silver resistor (6cm's long) - this will indicate a 2 speed fan and if the silver resistor has failed you need to replace it with an upgraded Gold resistor (10-15 euros) - to confirm - do this Start from cold. Put air con to "ECON" and turn on front screen demist. Nip round the front and have a look through the grille to see if the fan is permanently turning. If not it's probably time for a new upgraded gold resistor. https://www.dmgrs.co.uk/products/rov...64fde3e6&_ss=r If no resistor on your fan then it is likely to be an earlier 3 speed fan and it is probably a failure of the brushes - 20 euro fix https://www.ebay.co.uk/itm/Rover-75-...-/253458854588
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3rd February 2020, 10:29 | #3 | |
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[QUOTE]
Quote:
Hi Sergio. As above first find out which fan you have by looking through the front grill at about 14.00pm, with the engine not running you can insert a long screw driver to turn the fan blade to the required position, this will allow you to use a torch shine it into the area you will see either a silver resistor. Which is a two speed fan. 1 No resistor in place will be a four wire three speed fan. 2 To do the demist test make sure all the A/C is in the of position, turn the ignition key to II without starting the car (Diesel) then press demist button look through the front grill to see if the fan is running continually. If the fan is not running and you have a silver resistor in place replace this with a gold one the fan should work. 3 If not working and no resistor then you need to either replace the fan, or replace the brushes in the fan motor you will not know this until the fan is removed from the car and the motor opened up. 4 5 https://www.ecp.co.uk/rover75-carbon-brushes.php
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Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " Last edited by Arctic; 3rd February 2020 at 10:32.. |
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3rd February 2020, 13:18 | #4 |
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Check that the fan has not seized & cannot turn
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10th February 2020, 21:37 | #5 |
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mg Join Date: Jun 2015
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before answering want to say thanks for all the income... sorry for the time without answering but the job is taking me apart before the car...
the fan has the silver resistor, so its the 2 speed one... i will replace the resistor for the gold one has the lonk above from dmgrs... then will leave here the news... just another question; as any of you experienced a situation where you stop the car and engine and you hear the fan motor working for a few seconds, maybe 10 seconds or so??? thanks. |
10th February 2020, 22:51 | #6 | ||
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Quote:
You said your fan never works, however the diesel rarely needs the fan for engine cooling. The aircon system uses the low speed fan far more often, so have you confirmed it doesn't operate when the aircon is switched on? This can be checked by running the Demist Test. Realistically it's quite likely that the original resistor you see has indeed failed because they are under-powered. Quote:
If the low speed resistor has indeed failed, then you must be hearing the high speed. which is an unusual behaviour for a diesel fan. However, the diesel's control system is different from the others. It uses a printed circuit board that's known to be problematic. Strange behaviour of the diesel fan motor could suggest the circuit board needs fixing. There seems to be several things to consider. Does the motor actually turn or is the buzzing caused by a seized bearing, etc? The low speed system will require an uprated ('Gold') resistor (forum traders, eBay, etc) which will then enable you to run more tests to verify if the circuit board is operating correctly. TC |
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10th February 2020, 23:09 | #7 |
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that buzz, does it sound like radio interference? I get this when I turn my ignition off.
For the life of me I cant recall what it is but I was told a few years ago. Is it vents closing? macafee2 |
21st October 2020, 14:54 | #8 |
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Check to see if there is any damage to the fixing, it’s a 15mm nut to reattach the fan, put it on the spindle and give it 1/4 turn.
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21st October 2020, 21:23 | #9 | |
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Quote:
As Andy says above check that the fan blade as no damage, and if it can be fitted back you will need a thin wall 15 socket. 1 2 check the lugs on the inside of the blade, pointed out by the dots in the photo. 3 Removing the crash bar will help you gain more access. 4 remove 4 bolts and one nut either side. 5 6 7
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