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Blower fan fuse rating?

Discussion in 'Fuel System & Electrics' started by DanSA, Jul 4, 2015.

  1. DanSA

    DanSA Active Member

    Messages:
    486
    Location:
    Adelaide Hills
    Hi all.

    I have searched Ratwell, here and other sites, but can't seem to find the fuse rating for the blower fan (for the heater) in the engine bay. I currently have an 8A ceramic in there, but it keeps blowing. Fan seems to operate fine when fuses is changed (for a while)

    What have others got in there?
     
  2. rstucke

    rstucke Well-Known Member

    Messages:
    648
    Location:
    Wamberal NSW AUS
    hi
    here's a pic of the current flow of a good one.
    Something interesting, if you reverse the connections (the motor will spin the wrong way) it still blows air but nowhere near as much and the current is much less.
    I wonder how many bays out there are connected correctly considering past complaints about air flow P4270026.jpg
     
  3. mrsdawnrazor

    mrsdawnrazor Member

    Messages:
    47
    Location:
    Brisbane
    Mine keeps blowing too - Pete from custom Vee Dub has tried to fix it about 4 times. Next time - changing the switch out.
    Already replaced the whole fan unit!
     
  4. rstucke

    rstucke Well-Known Member

    Messages:
    648
    Location:
    Wamberal NSW AUS
  5. DanSA

    DanSA Active Member

    Messages:
    486
    Location:
    Adelaide Hills
    Thanks heaps guys. Looks like I have the wrong fuse in there by half!
    Will replace and monitor. Loving the heat on these frosty mornings
     
  6. StevieVW

    StevieVW Well-Known Member

    Messages:
    3,473
    Location:
    Somerset, Tasmania
    Anyone know where i can get the pipes that connect the fan to tinware holes? ones sides round the other oval?
     
  7. cbus

    cbus Well-Known Member

    Messages:
    10,895
    Location:
    sunshine coast
    most auto places will have it.
    the oval one is same round tube shaped to conform.
    check measurements as theres some different sizes
     
  8. Kai

    Kai Well-Known Member

    Messages:
    4,682
    Location:
    Eastlakes, NSW
  9. oldman

    oldman Super Moderator Staff Member

    Messages:
    8,026
    Location:
    Avalon Beach NSW
    I thought this was interesting, given my minimal electrical knowledge/experience……
    Today I pulled the fan out to give it a good blow-down'n'clean, check the brushes etc. & thought I'd reverse the connections to see how much of a difference there'd be….
    Holy 5hit !! …airflow & speed has just about doubled !
    Thought I was imagining it, so I reinstating the wiring to original & the airflow dropped markedly……o_O
    So, it would appear that I've been running with the wires ass-about for the last 6 or so years …..
    Funny, 'cause the heater has always been good but now it's fan-bloodytastic !!
    Thanks for the tip, I'd recommend everyone should check how there fans are connected….it's only a 5 min. job & the result may be as good as mine.
    Cheers,
    Mark
     
  10. DanSA

    DanSA Active Member

    Messages:
    486
    Location:
    Adelaide Hills
    Great to hear Oldman!

    Sticky?
     
  11. rstucke

    rstucke Well-Known Member

    Messages:
    648
    Location:
    Wamberal NSW AUS
    the photo of the current flow (and comment on polarity) above were one of many I took while I was repairing (replacing bearings) on my blower.
    I can post them all if you like.
    I read somewhere that these fans are not repairable but as with the worm & roller steering box, this isn't quite true.

    Cheers
    Rick
     
  12. oldman

    oldman Super Moderator Staff Member

    Messages:
    8,026
    Location:
    Avalon Beach NSW
    Hey Rick, I also replaced the brushes with a pair normally used for a Makita electric planer.
    Just needed to file the carbon block down to fit the brush cradle & trim down the brass end-caps so that they fit too.
    Easy enough to do, just requires a little lateral thinking…...
    Many thanks for your observations.
    Cheers,
    Mark
     
  13. oldman

    oldman Super Moderator Staff Member

    Messages:
    8,026
    Location:
    Avalon Beach NSW
    r stuck e !! :rolleyes:
     

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