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I have 2 zone cooling in my house. both outside units turn on. Hot air comes out of the ventt, both upstairs and down. What needs to be done to get cold air?

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Hello. Go outside and take a look at the fan/condenser. You should be able to see 2 brass pipes (one thin, one thick) connected to the fan/condenser. If you find ice on one of the pipes, then your AC need more freon. If the fan on the condenser isn't turning, then you might need new fuses. Depending on your location, you might need to call a HVAC if you need freon; many states don't allow the sales of freon without a proper license. You can find fuses at Home Depot. Make sure all breakers were set to off before you remove/install fuses or you could get electrocuted.

If the unit outside is running and you couldn't find ice on those brass pipes, then you have to check the air handler (usually by the furnace inside your garage). Open the cover, and check for water. If you found water, then the drain pipe is blocked. You can take a hose and blow air into the drain pipe to clear the block. If that didn't work, you will need to use an air compressor to blow air into the drain pipe.

Posted on Jul 31, 2010

  • Joe Hogan Jul 31, 2010

    I hope this helps you. J.

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I am not understanding exactly what is happening with your unit. You say it only runs for 4 hours a day and then say that after 4 hours the outside unit shut off. But you don't describe the condition of the outside unit! Is there ice on your outside unit after it runs for four hours or is it so hot that the housing would fry an egg? Since it works for four hours and then stops working, I would guess that ice forms on the condenser grill which tells the thermostat that your air is much colder than it actually is. Then it takes time for the ice to melt off again. Am I close? If so this condition is usually caused by your unit being low on freon making everything work harder. But it could also mean that you have a leak in the system somewhere. But it shouldn't be much of a leak or it wouldn't run for the 4 hours.
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