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A/C & defrost

Discussion in 'The Garage' started by fatboy, May 14, 2004.

  1. fatboy

    fatboy 1/2 ton status

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    why does the ac pump activate when you turn on the defrost? The problem with that is I have a flexilite electric fan with the ac reley. So when the pump turns on so do the fans and slows the warm up? Anyone have a solution for me?
     
  2. 4x4Freak

    4x4Freak 1/2 ton status

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    The AC comes on because it helps pull the moisture out of the air, wich causes the windows to fog up. I think the easiest way would be to put a switch on the fan so you can manually turn it off when it's not needed during the winter.
     
  3. johnc

    johnc Registered Member

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    Can't you wire it to the temp gauge some how so it will be automatic????? /forums/images/graemlins/dunno.gif /forums/images/graemlins/dunno.gif /forums/images/graemlins/dunno.gif
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    run a toggle switch so you can manually turn off the fans /forums/images/graemlins/thumb.gif
     
  5. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    I thought it was so the A/C got cycled during the winter time. /forums/images/graemlins/dunno.gif I can't see how it would help make the air dryer on my later model rig because the evap and heater core are seperated. IIRC. /forums/images/graemlins/thinking.gif /forums/images/graemlins/dunno.gif
     
  6. HarryH3

    HarryH3 1 ton status Author

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    The air blows across the a/c coil, which is cool, causing moisture in the air to condense on it. Then the air blows across the heater coil, heating it up. Running the a/c makes the defroster work a LOT better than without it.

    Electric fans need to be wired to come on with the a/c so that the pressure in the system doesn't get out of whack. Running the a/c with no airflow across the condensor is not a good thing to do.
     
  7. fatboy

    fatboy 1/2 ton status

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    OH! thanks maybe I wont do that then? So I am back where I started lmao /forums/images/graemlins/histerical.gif /forums/images/graemlins/thinking.gif
     
  8. mcinfantry

    mcinfantry 1/2 ton status

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    i agree on not overriding the fans on the radiator/condenser. heat and pressure gets WAY out of whack doing it. think about it, mechanical fans work fine and they are on....
     

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