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Outside AC unit working, but inside there is no air flow and fan inside will not work unless it is turned manually. Also, a little ice on outside unit.

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  • morenoletici Nov 14, 2009

    thank you for your response...i will attempt. ac unit working fine until two days ago and now when we turn it on, unit outside comes on, but no air flow inside and unit won't kick in inside either. we notice ice forming on outside unit.

  • morenoletici Nov 14, 2009

    thank you for your response...i will attempt. ac unit working fine until two days ago and now when we turn it on, unit outside comes on, but no air flow inside and unit won't kick in inside either. we notice ice forming on outside unit.

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Depending on what type of Thermostat you have, it is usually as simple as setting a jumper for Electric heat instead of gas.
If you have a digital Thermostat then turn off the power to the Air handler and remove the thermostat. Look closely at the small jumpers and make sure your jumpers are set to elect. and not gas so the fan can run in heat mode.
If you have a standard heat cool mercury switch then same as before with the power and unscrew the thermostat, and where the yellow wire is connected if there is a factory with on the yellow, then move the factory wire to the (A) and put the yellow wire back on the (Y).

Good Luck!

Posted on Nov 14, 2009

  • Michael McQuay
    Michael McQuay Nov 16, 2009

    Yes if the Outside is running but not the inside then it will cause the outside to freeze up. In most cases there is safety's built into the systems (High and Low) Presser sensors that can shut down the unit, If the refrigeration falls below or above normal operating pressures,

    If you have fixed the Thermostat problem and still no fan then you will want to check and make sure you can spin the fan freely with your hand, (Turn off power first to unit). If it does then remove the capacitor from the unit and have a local appliance store test it for you and replace as needed.



    Keep me updated.



    Good Luck!

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