If your filter is clean and your coil is freezing up, you are low on refrigerant. You need to have it checked for a leak. I'm afraid I let my air filter get too dirty and my central unit has frozen up. I turn the unit off and let all the ice melt both n the inside coils and outside line that runs to the outside compressor. I thought all the ice was gone ( and I have since replaced the really dirty filter) and started the unit back up and it ran great for a couple of hours, but now it frozen again, even with the new filter. Did I wait long enough or what? The unit was serviced last year, both cleaned and with new freon. I think the dirty filter is what caused it. Now what can I expect? Help, we're getting hot. Its still summer in Memphis. Thanks.
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Turn it off.
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