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Thread: Heater Only Working On 4? Try This...

  1. #1
    CF-oholic! fla's Avatar
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    Heater Only Working On 4? Try This...

    My heater panel operates intermittantly between all speeds and then just on 4. It was stuck for a while so i took them apart as i had replaced the thermal fuse recently. Anyways, this is a potential repair option if you find your thermal fuse is ok:
    Need to remove this bit with a small screwdriver
    [attachment=6:1knyb16y]19122009796.jpg[/attachment:1knyb16y]

    Crappy pic but the black tab in the middle is what you need to push in to pull this bit out

    [attachment=7:1knyb16y]19122009789.jpg[/attachment:1knyb16y]

    removed from heater control:
    [attachment=5:1knyb16y]19122009791.jpg[/attachment:1knyb16y]

    Spades other side connect to the upper portions, the slider connects these to the top copper arc to give the different speeds
    [attachment=4:1knyb16y]19122009793.jpg[/attachment:1knyb16y]

    this is the main contact wiper and needs to contact both the upper copper arc and the lower speed contacts. This either gets pitted or deformed resulting in no fans at low speeds. Give it a clean witha file or emery paper and tweak it slightly to ensure a good pressure both top & bottom
    [attachment=3:1knyb16y]23122009811.jpg[/attachment:1knyb16y]

    ready to refit speed control portion

    [attachment=2:1knyb16y]23122009820.jpg[/attachment:1knyb16y]
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

    my car

  2. #2
    CF Nutter 8vMatt's Avatar
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    Re: heater only working on 4? Try this

    Might have to have a look into this to see if the reason my number 2 position doesn't come on can be solved in the same way.
    94L VR6 Mystic Blue- Moved On.
    1990 Royal Blue mk2 Golf gti 16v- sold
    2012 Transporter T5.1

  3. #3
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    Re: heater only working on 4? Try this

    Me too, my speed no.1 isnt working. One of a few problems im having at the moment
    Gaz

    '93 VR6 Bordeaux pearl- Recon VR engine -16/01/08; KW V1s; BMC CDA; Milltek Sports CAT; Supersprint exhaust; 16" Cades Eros; smoked rears & side reps - SOLD 14/07/2013 Gone but not forgotten.

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  4. #4
    CF-oholic! fla's Avatar
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    Re: heater only working on 4? Try this

    What i would also suggest is prior to removing the contact in the dial, check for continuity between the dial contact and each of the upper and lower contacts - ie connect your ohm-meter to the dial contact and the upper copper arc. Move the dial to each speed position, you should have no resistance. If there is it means the upper portion of the dial contact needs cleaning/adjusting. The lower one iis a bit more fiddly - again connect one end to the dial contact and the other to each of the contacts in the removable portion. You will need to use pointed leads on the meter. This will identify whether the lower part of the dial contact is ok.
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

    my car

  5. #5
    Enthusiast VR-Sixy's Avatar
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    Re: Heater Only Working On 4? Try This...

    I have the same problem on my VR6 - heater fan only works on setting 4. Thanks for
    the info here..... i'll give it a try when the weather cheers up a bit.
    Almost an off the shelf Moonlight Blue Pearl Metallic VR6.
    Got Lupo wipers, an upgraded headlight loom and
    Inpro Clear/Red rear clusters.

  6. #6

    Re: Heater Only Working On 4? Try This...

    this is for the later corrado ? does it work on a early one thanks

  7. #7
    CF-oholic! fla's Avatar
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    Re: Heater Only Working On 4? Try This...

    Dont really know what the early one looks like tbh. Sorry.
    Just another suggestion for those who ahve this issue - check the brass rivets to which the thermal resistor is fixed. This sits in the resistors in the circualtion fan housing itself. Might look ok, but there may be a minute amount of clearance giving an open circuit. Its the bit to the left of the picture, where i've fitted the brass connecting block. This gave me no end of grief for ages, as it just didnt occur to me that there was a gap here. Also worth checking the other side too. HTH
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

    my car

  8. #8
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    Re: Heater Only Working On 4? Try This...

    This worked fantistic! It fixed the problem - you're a star
    http://i402.photobucket.com/albums/p...inesis/1-3.jpg
    '94 Corrado 2.0 16v - Golf Mk2 Ottinger GTi 16v with twin-45's - Scirocco GTII Weber & GTi-cammed
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  9. #9
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    Re: Heater Only Working On 4? Try This...

    Is this the only cause for heater fans only working on 4, or are there other possible causes?
    - - - - - - - - > My Aqua Blue VR6 - Progress Thread < - - - - - - - -


  10. #10
    CF-oholic! fla's Avatar
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    Re: Heater Only Working On 4? Try This...

    can also be the thermal fuse failing - just desolder and resolder a new one in.
    Hasan
    VR6 Auto to manual conversion, beige leather, aircon, TT comps, blue dash lights & switches, Koni TA/Nothelle springs, OBD2, 264 cams, Schrick

    my car

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