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    Schwigg's Avatar
    Schwigg Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 20, 2009, 09:31 AM
    Central air unit
    My AC started the summer season just fine. However, last night it started heating up in the house.

    Today I went out to take a look at the unit and I found the line going to the house had ice on it. Upon further inspection I found that the line on the inside of the unit was also iced up.

    What are my options?
    twinkiedooter's Avatar
    twinkiedooter Posts: 12,172, Reputation: 1054
    Uber Member
    		  
    #2

    Jun 20, 2009, 09:54 AM

    You need to turn the unit off completely and let the frozen areas defrost. Possibly the unit iced up due to extreme humidity conditions. My a/c used to do this when I lived in South Florida a lot. My unit would do this in the late spring and early autum a lot due to the humid conditions usually after it rained and was hot at night.

    Hopefully your unit defrosts okay and then runs properly. Allow the unit a good 6 hours to completely defrost to be sure otherwise it will just ice up again if not completely defrosted.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #3

    Jun 20, 2009, 10:26 AM
    Three things will cause this: 1) The indoor coil is starved for airflow, due to a clogged air filter, blocked supply and/or return registers, dirt accumulation on the indoor coil, or a malfunctioning indoor blower. 2) The system has lost (leaked) a portion of the refrigerant, and the pressures/temperatures are lower than intended. Condensate freezes to the coil surface rather than draining away. 3) The system is under-loaded due to relatively low indoor and outdoor temperatures (I saved this scenario for last as it is the least likely).
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