cdti cooling fan

david2000 · 19th June 2021, 20:53

hi to all
the cooling fan on my rover 75 only comes on high speed and it has the silver resistor fitted how can i test the resistor to see if it is faulty and would replacing it with a gold resistor solve the fault
david

SD1too · 19th June 2021, 21:21

Quote:

Originally Posted by david2000

... how can i test the resistor to see if it is faulty ...

With ignition on or engine running, press the windscreen demist button on your air con./heater control panel. Now walk to the radiator grille to see if your fan is running.

Simon

david2000 · 19th June 2021, 22:09

hi to all
i tested the fan using a t4 there was no low speed only high is the resistor at fault and would replacing the resistor to a gold resistor sort it out and low speed would return
david

Arctic · 20th June 2021, 00:58

Quote:

Originally Posted by david2000

hi to all
i tested the fan using a t4 there was no low speed only high is the resistor at fault and would replacing the resistor to a gold resistor sort it out and low speed would return
david

David yes change the silver resistor, for a gold one if the resistor is already gold then it as failed and needs replacing, there is an how to on here for changing it out.

PS make sure that the tails on the resistor have a good length of heat shrink on them, and use the original bracket to fix it to.

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Typhoon190 · 20th June 2021, 20:31

Jules is you're man for this. He supplies the resistor and the How-to.

https://www.the75andztclub.co.uk/for...Jules+resistor

david2000 · 21st June 2021, 21:15

hi to all
what if i replace the silver resistor for a gold resistor and it still does not work does that mean that the circuit board is at fault
david

19th June 2021, 20:53	#1
david2000 Loves to post Rover 75 Tourer Join Date: Dec 2007 Location: Ammanford Posts: 488 Thanks: 248 Thanked 29 Times in 24 Posts	cdti cooling fan hi to all the cooling fan on my rover 75 only comes on high speed and it has the silver resistor fitted how can i test the resistor to see if it is faulty and would replacing it with a gold resistor solve the fault david

19th June 2021, 22:09	#3
david2000 Loves to post Rover 75 Tourer Join Date: Dec 2007 Location: Ammanford Posts: 488 Thanks: 248 Thanked 29 Times in 24 Posts	hi to all i tested the fan using a t4 there was no low speed only high is the resistor at fault and would replacing the resistor to a gold resistor sort it out and low speed would return david

20th June 2021, 20:31	#5
Typhoon190 This is my second home MG ZT-T 190 Monogram Typhoon Join Date: Jan 2009 Location: Oxfordshire Posts: 4,707 Thanks: 328 Thanked 557 Times in 443 Posts	Jules is you're man for this. He supplies the resistor and the How-to. https://www.the75andztclub.co.uk/for...Jules+resistor

21st June 2021, 21:15	#6
david2000 Loves to post Rover 75 Tourer Join Date: Dec 2007 Location: Ammanford Posts: 488 Thanks: 248 Thanked 29 Times in 24 Posts	hi to all what if i replace the silver resistor for a gold resistor and it still does not work does that mean that the circuit board is at fault david