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  • FIRST POST
    • katebl
    • By katebl 13th Jan 10, 8:48 AM
    • 541Posts
    • 249Thanks
    katebl
    Fiesta ST - fan stuck on, worn battery flat!
    • #1
    • 13th Jan 10, 8:48 AM
    Fiesta ST - fan stuck on, worn battery flat! 13th Jan 10 at 8:48 AM
    Hi everyone, as above basically, OH drove the car 5 miles into work and the fan has been on for 45 mins now and flattened the battery - am going to have to call RAC or AA and join up (not cheap I know!) but has anyone any suggestions as to why this could have happened? The car is a 55 plate, we bought it in August and straight away had to have a new water pump - not sure if that's relevant?

    If anyone needs any more info please let me know, any thoughts welcome!:confused:
Page 1
    • Exemplar
    • By Exemplar 13th Jan 10, 8:51 AM
    • 1,019 Posts
    • 356 Thanks
    Exemplar
    • #2
    • 13th Jan 10, 8:51 AM
    • #2
    • 13th Jan 10, 8:51 AM
    which fan?
    • katebl
    • By katebl 13th Jan 10, 8:58 AM
    • 541 Posts
    • 249 Thanks
    katebl
    • #3
    • 13th Jan 10, 8:58 AM
    • #3
    • 13th Jan 10, 8:58 AM
    The engine fan? I can hear it through the front grille? HTH, I'm not very good with cars!
    • maninthestreet
    • By maninthestreet 13th Jan 10, 9:05 AM
    • 14,889 Posts
    • 13,133 Thanks
    maninthestreet
    • #4
    • 13th Jan 10, 9:05 AM
    • #4
    • 13th Jan 10, 9:05 AM
    Thermostat for the fan stuck????
    Check the car's handbook to see if there is a separate fuse for the fan. If so, removing it would prevent the fan working, though there may be a risk of the car overheating then (but unlikely in this cold weather?).
    "You were only supposed to blow the bl**dy doors off!!"
    • shandypants5
    • By shandypants5 13th Jan 10, 9:08 AM
    • 2,027 Posts
    • 2,777 Thanks
    shandypants5
    • #5
    • 13th Jan 10, 9:08 AM
    • #5
    • 13th Jan 10, 9:08 AM
    Is there an actual engine temp guage on the dash, and does it read normal or hot?

    It may be that the water is not circulating and the engine is running hot, causing the fan to be called for. (you mentioned that you had water pump problems in the past, or the bottom of the rad could be frozen.)
    “Careful. We don't want to learn from this.”

    • missile
    • By missile 13th Jan 10, 9:22 AM
    • 8,319 Posts
    • 3,947 Thanks
    missile
    • #6
    • 13th Jan 10, 9:22 AM
    • #6
    • 13th Jan 10, 9:22 AM
    I had a similar problem on my Cosworth. The stealers replaced the battery before they diagnosed it was the temperature sensor unit which cost very little and was very easy to replace.
    "A nation's greatness is measured by how it treats its weakest members." ~ Mahatma Gandhi
    Ride hard or stay home
    • katebl
    • By katebl 13th Jan 10, 10:38 AM
    • 541 Posts
    • 249 Thanks
    katebl
    • #7
    • 13th Jan 10, 10:38 AM
    • #7
    • 13th Jan 10, 10:38 AM
    Thanks all, just had RAC come and jump the battery, it works fine now and the fan has stopped (annoyingly) but he thought it may be a stuck relay (whatever that is!). Just seems to be one thing after another!
    • missile
    • By missile 13th Jan 10, 11:56 AM
    • 8,319 Posts
    • 3,947 Thanks
    missile
    • #8
    • 13th Jan 10, 11:56 AM
    • #8
    • 13th Jan 10, 11:56 AM
    Thanks all, just had RAC come and jump the battery, it works fine now and the fan has stopped (annoyingly) but he thought it may be a stuck relay (whatever that is!). Just seems to be one thing after another!
    Originally posted by katebl
    My problem was an intermitent fault. Battery flat every other week. When I took it to the gararage they couldn't find anything wrong.

    The sensor cost very little I would suggest change it, may save you getting stuck. Very easy to do even DIY, look in maintenance manual or ask a friendly mechanic to point out the components.
    "A nation's greatness is measured by how it treats its weakest members." ~ Mahatma Gandhi
    Ride hard or stay home
    • Exemplar
    • By Exemplar 13th Jan 10, 12:41 PM
    • 1,019 Posts
    • 356 Thanks
    Exemplar
    • #9
    • 13th Jan 10, 12:41 PM
    • #9
    • 13th Jan 10, 12:41 PM
    I second Missile, if it is that its very cheap and an easy DIY job
  • Inactive
    If the engine / radiator fan had cut in, it possibly indicates an overheating problem, this may be the result of having too weak anti freeze mixture, amongst other things.

    The fan being on, in itself shouldn't cause the battery to run flat.
  • catflea
    Inactive,

    I've read it as the vehicle being stationary and turned off (hence the need for a jump) Rad Fans draw a reasonable amount of current in general and 45mins at full chat would certainly be enough to drain a fester battery.

    Remember that when the cars off, the alternators not spinning and the batterys not charging so any discharges can run the car down very quickly!
    Proud of who, and what, I am.
  • Inactive
    catflea, you could well be right on that, the OP isn't very well worded.

    However my first comments in the first paragraph still stand, I believe.
    • missile
    • By missile 13th Jan 10, 3:15 PM
    • 8,319 Posts
    • 3,947 Thanks
    missile
    If the engine / radiator fan had cut in, it possibly indicates an overheating problem, this may be the result of having too weak anti freeze mixture, amongst other things.

    The fan being on, in itself shouldn't cause the battery to run flat.
    Originally posted by Inactive
    The fan should stay on after the engine is switched off until the engine cools. However in my case, sometimes the fan would stay on and drain the battery overnight.

    FYI, Having "too weak antifreeze mixture" is not very clever but it would not cause an engine to overheat.
    Last edited by missile; 13-01-2010 at 3:18 PM.
    "A nation's greatness is measured by how it treats its weakest members." ~ Mahatma Gandhi
    Ride hard or stay home
  • Inactive

    FYI, Having "too weak antifreeze mixture" is not very clever but it would not cause an engine to overheat.
    Originally posted by missile
    Really?.. I thought if say a bottom hose had frozen solid, the coolant would not circulate throughout the system, causing over heating, but you obviously know more than I do.

    Surely a cooling fan should not be cutting bin at all in these conditions, or have I got that wrong as well?
    • missile
    • By missile 13th Jan 10, 4:56 PM
    • 8,319 Posts
    • 3,947 Thanks
    missile
    Really?.. I thought if say a bottom hose had frozen solid, the coolant would not circulate throughout the system, causing over heating, but you obviously know more than I do.

    Surely a cooling fan should not be cutting bin at all in these conditions, or have I got that wrong as well?
    Originally posted by Inactive
    That is not what you said in your earlier post If you are stuck in traffic or leave your car idling long enough, e.g. like those stranded in the snow, then IMHO the fan will cut in.

    There is no need for your sarcastic comments.
    "A nation's greatness is measured by how it treats its weakest members." ~ Mahatma Gandhi
    Ride hard or stay home
  • Inactive
    There is no need for your sarcastic comments.
    Originally posted by missile
    They were not " sarcastic " as you put it, I honestly thought that you knew something different, you clearly do not.
  • Big brown eyes
    I need help! I got a new car battery and now the radio isn't working. Can anyone help? The serial number is M143325.
    Thank you x
  • ScottishSapper
    I need help! I got a new car battery and now the radio isn't working. Can anyone help? The serial number is M143325.
    Thank you x
    Originally posted by Big brown eyes
    Replied to on the ford board
    • katebl
    • By katebl 13th Jan 10, 10:58 PM
    • 541 Posts
    • 249 Thanks
    katebl
    Thanks all, just to clarify, the fan came on as soon as the ignition was turned on this morning (even before the engine was started!), all your suggestions have been very welcome and I'll certainly be reading the manual to try and learn a bit more about cars!
    • atrixblue.-MFR-.
    • By atrixblue.-MFR-. 13th Jan 10, 11:41 PM
    • 6,411 Posts
    • 4,433 Thanks
    atrixblue.-MFR-.
    The fan should stay on after the engine is switched off until the engine cools. However in my case, sometimes the fan would stay on and drain the battery overnight.

    FYI, Having "too weak antifreeze mixture" is not very clever but it would not cause an engine to overheat.
    Originally posted by missile
    your wrong:

    my bro's focus bottom rad pipe froze, resulting in the engine overheating and subsequintly caused damage to engine wich when the weathers ok i will repair for him.

    no water curculation no cooling, no or wrong mix of water/anti freze i.e too week will cause the water to freeze buy the time the heat of the engine melts the lumps of ice in the pipe the engine's gone tatty byby.
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