Fan switch 1989 r4

  1. Richnd1974

    Richnd1974 Enthusiast

    Messages:
    284
    Location:
    Bournemouth
    My fan switch is toast, what switch do I need as it's got some strange coil on the back.

    Regards Richard
     
    • 20170419_130313.jpg
  2. Paul Narramore

    Paul Narramore pre-moderated

    Messages:
    844
    Location:
    Aylesford, Kent
    Same as mine, Richard. Der Franzose lists No.85042 but this looks more like one of the rockers switches on the side of the dashboard. Look in the 'Search' box, top right on this page, as there are posts on this switch.
     
  3. Richnd1974

    Richnd1974 Enthusiast

    Messages:
    284
    Location:
    Bournemouth
    Does this switch simply turn the fan on and off (no two stage fan speeds?) I cant work out why the one in the car has a resistance coil on it.. unless the new ones 85042 have it but it's hidden in the casing.
     
  4. Paul Narramore

    Paul Narramore pre-moderated

    Messages:
    844
    Location:
    Aylesford, Kent
    No, it is a two-stage switch for a 2-speed fan. The Der Franzose switch looks nothing like the one we are discussing, doesn't it? The coil is a resistor and presumable takes any heat away from the switch terminals. But what do I know when electrics come into the conversation. Hopefully Andrew4Renaults will read this and off his words of advice. He quickly fixed my trailer lights.
     
    Richnd1974 likes this.
  5. jjad

    jjad Enthusiast

    Messages:
    1,018
    Location:
    Northants
    The coil is indeed a resistor. It is used to divert power away from the fan motor (M) when you want the fan to run more slowly. That is, when on the lower of the two fan speeds (1), current is passed through the resistor, causing a voltage drop across it so that the voltage across the motor is less (causing it to turn more slowly). When the higher fan speed is required (2), the resistor is bypassed.

    Fan.png
     
    Last edited: Apr 19, 2017
    Richnd1974 likes this.
  6. Richnd1974

    Richnd1974 Enthusiast

    Messages:
    284
    Location:
    Bournemouth
    so assume that the switch 85042 on Franzose won't work then ? or will it ?
     
  7. jjad

    jjad Enthusiast

    Messages:
    1,018
    Location:
    Northants
    What's odd is that in your photo there are only two wires. For a two-speed fan there should be three wires. Did your fan ever work as a two-speed fan, or was it only on/off?
     
  8. Paul Narramore

    Paul Narramore pre-moderated

    Messages:
    844
    Location:
    Aylesford, Kent
    Richard
    I've found the switch you require in the Der Franzose catalogue - I just can't get on with their online catalogue - and it is No.85058 (11.57euros). Should you ever buy anything from Der Franzose, ask them for a free copy of their 350 page catalogue for the Renault 4 (Part no.89991 in English). Fascinating reading and far easier to cope with than the online version. jjad, I pulled my heater fan switch out and it has just two wires.
     
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  9. Richnd1974

    Richnd1974 Enthusiast

    Messages:
    284
    Location:
    Bournemouth
    Thanks Paul / JJAD I indeed have a copy of the Der Franzose catalogue, I have already spent 400euro with them since Sunday ! so I shall have to add a couple more things like the heater switch to the next order :-) thanks everyone :-)
     
  10. jjad

    jjad Enthusiast

    Messages:
    1,018
    Location:
    Northants
    Two wires does make sense actually. Thanks for confirming.
     
  11. petak

    petak Enthusiast

    Messages:
    1,126
    Location:
    Vodice, Croatia
    What is happening with switch?

    I had problem with rocker part of switch. Could not press it to start fan working.
    Opened it and adjust contacts inside switch, and switch is continued to do his duty (turning fan on/off).
    Still working.

    If resistor is broken then there is not much of help.

    There should be only two wires.
     
    jjad likes this.
  12. Richnd1974

    Richnd1974 Enthusiast

    Messages:
    284
    Location:
    Bournemouth
    The rocker part has broken
     
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