Fan blower won't turn off

Discussion in 'General Maintenance/Repair Questions' started by guus, Aug 7, 2022.

  1. guus

    guus New Member

    May 1, 2018
    Since i cant find a dedicated four winns forum on the net, i thought ill try here.

    I'm looking at a four winns vista 378 form 2009,
    it looks very decent but i have some concerns, when the guy representing the seller told me that the fan blower in the bilge turns on automatically if you turn on the power and from there it just never stops running.
    On the switch board the fan button is lighting up red. but flicking it either way doesnt turn it off either.

    It seems harmless if it is running all the time but the whirring sound is kinda annoying though.

    So my question:
    1) could this insignificant problem actually be a precursor to a much bigger problem with for example the electrical system/wiring or something?
    So in other words, should i be concerned or is this usually a common problem that just needs a simple fix?

    2, another thing i noticed was that the motor hatch has two water drains, in my old boat those hoses where directed to holes in the side of the boat so any excess water is redirected straight out.
    In this case however, the hoses are attached to nothing. in other words, the excess water just ends up in the bilge, which seems strange to me.
    The guy told me it's normal because if the bilge fills up with water the pumps are activated.
    this might seem logical but lets say you are at sea and big waves crash in and you loose power/batteries then what happens? no batteries, no bilge pump.
    Maybe perfectly normal but to me it seems a bit scary.

    thanks very much for taking the time to help out!
  2. Nater Potater

    Nater Potater Well-Known Member GOLD Sponsor

    Oct 19, 2020
    Southwest Idaho
    1992 300DA Sundancer
    Twin Merc Alpha I Gen II I/O's with 5.7 V8's
    1) Not brand specific, but blower fans typically aren't built to be on full time, unless someone's replaced them with continuous-duty units (not likely). As for what it might lead to in the electrical system, no help here.
    2) Never seen hatch drains just dumping into the bilge. Others here may chime in otherwise. 'Sounds like usual used-car-saleman drivel to me.
    Tripsdad likes this.
  3. Carpediem44DB

    Carpediem44DB Well-Known Member

    Aug 18, 2015
    Sanfransico Bay area
    2000 Carver 506
    2006 44 DB Sedan Bridge
    Volvo TAMD 74 P
    My guess is the switch on the panel failed so someone just jumped the switch so they would have an operational blower.
    If you like the boat, I would not let this be a deal killer but just make sure you get a mechanical surveyor that is thorough and can address these issues.
    Tripsdad, Chris-380 and Nater Potater like this.
  4. Chris-380

    Chris-380 Well-Known Member

    Jan 20, 2019
    Pontoon Beach IL
    2000 380 Sundancer
    7.4L Horizon w/V drives
    Not near the participation in the four winns site, but def good group

    Tripsdad likes this.
  5. dwna1a

    dwna1a Well-Known Member PLATINUM Sponsor

    Apr 23, 2012
    James River
    88 Weekender 300 "Seahorse"
    Twins 350
    This might just be me but,
    Sounds as if the switch is wired wrong. I should, repeat should be a easy fit.
    The hatch drains should all be connected to drain overboard. Mine are PVC pipe. Again another easy fix.

    This leads me to this statement. Seems to me there have been some minor problems that were kinda band aided as a repair. Makes me wonder about bigger issues or maintenance that has been delayed or bypassed just to save a dime. To me it would be a red flag. Survey everything!
    Nater Potater likes this.
  6. ttmott

    ttmott PhD in OCD TECHNICAL Contributor GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Does your boat have a fire protection system?
    If so then the helm blower switch probably activates a blower controller which operates the fans.
    On Sea Ray boats that fan module is typically installed inside of the main circuit breaker panel.
    Sometimes the modules will fail on and you have to turn the circuit breaker off to get the fans to turn off. Here is a picture of the one on my boat -
  7. guus

    guus New Member

    May 1, 2018
    thx for the replies!
    they told me they got the switch sorted now. also, the hoses are supposed to be hanging loose in the bilge, i just saw a youtube video of another similar boat and those hoses are also just dangling there.

    one more thing, the guy told me, as if it were a good thing, the boat has been in storage for the past three years.
    Isnt that really bad for diesel engines (volvo D4-300)? i mean, doesnt that dry out the gaskets and rubber seals?

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