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.
Turn it off.
It depends on the temperature.
More importantly, why is the unit freezing? There are several reasons that can cause this. Most common are dirty filter or evaporator coil that the filter protects. It can also be lack of air flow across the evaporator coil due to a bad fan motor or broken fan belt if so equipped. Last reason might be the unit is low on refrigerant which would mean that you have a leak somewhere.
A 12000 sqft home would probaly use more than 1 unit.
Turn it on the Fan setting and let it run about 20 min. to about 1/2 hr.
About an hour, on average.
Miles are not a unit of time.
How long will it take to replace a belt tensioner unit and serpentine belt in a lexus 1996 sc300?
1 unit = 1 hour
1 unit is normally 1hour but some times little more or less.
It takes somewhere between 90 and 120 days to replace a unit of blood.