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rear window heater!

  • 26-11-2010 4:58am
    #1
    elchanco
    Registered Users, Registered Users 2 Posts: 329 ✭✭


    Hi,

    The button which turns on the rear heater/defroster in my ford focus '00 keeps turning on/off itself???
    How would i go about fixing this?

    tryed google'n,not much help!


Comments

  • #2
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    How's your battery/do you use the car for short distances only? AFAIK the defroster is automatically switched off the battery voltage is too low.


  • #3
    elchanco
    Registered Users, Registered Users 2 Posts: 329 ✭✭elchanco


    battery.. the battery light was coming on maybe three times last week but has stopped now?


  • #4
    VinnyTGM
    Registered Users, Registered Users 2 Posts: 827 ✭✭✭VinnyTGM


    Are you using it whilst sitting in heavy city traffic, it will drain the battery if you are.


  • #5
    sogood
    Registered Users, Registered Users 2 Posts: 1,258 ✭✭✭sogood


    Most, if not all heated rear windows will switch off once they get up to temp, to save draining your battery. Is this whats happening? Also, if you switch off the ignition it will also switch off, for the same reason. Otherwise I would suspect a relay or similar, thats tripping off too soon.


  • #6
    Eph1958
    Registered Users, Registered Users 2 Posts: 234 ✭✭Eph1958


    How good is your battery? This cold weather will kill any battery approaching the end of it's life. I would check it first. Good luck.


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  • #7
    VinnyTGM
    Registered Users, Registered Users 2 Posts: 827 ✭✭✭VinnyTGM


    Technically the cold doesn't kill your battery, the heat of summer does, but once winter comes the effects of a worn down battery are more pronounced.


  • #8
    MarkoC
    Registered Users, Registered Users 2 Posts: 428 ✭✭MarkoC


    @ elchanco

    Get a new switch from scrapyard and avoid the rest of the comments here :D
    Your car alternator is powerful enough to feed all your car electric system and your battery wont drain because of the rear window heating.

    @ VinnyTGM

    Cold is what kills batteries, even brand bew ones which didnt see any summer.


  • #9
    elchanco
    Registered Users, Registered Users 2 Posts: 329 ✭✭elchanco


    the switch flickers from on/off and sometimes wont go off. very f''' annoying! Typical than tonight, it stayed off when the window was frozen over! :rolleyes:


  • #10
    v300
    Registered Users, Registered Users 2 Posts: 356 ✭✭v300


    It's a timed switch on many modern cars, including modern Fords.

    It will always turn it's self off after a short while as it really strains the alternator and pushes down fuel economy as a result. On a really frosty day, you might have to push it 3 time to clear a well frozen and iced up window.


  • #11
    elchanco
    Registered Users, Registered Users 2 Posts: 329 ✭✭elchanco


    on a normal day, it flicks from on/off for long periods. Ive given up on pressing the button now. Im happy if it just stays off..


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