The cooled air circulates throughout the house via the heat ducts then returns to the furnace as warm air to be cooled [â¦] I may ⦠Occasionally, my central AC, both inside and outside units being Lennox, stops cooling and blows only fan. The air blowing is not cooled and the fat pipe near the air handler (inside unit) is not cold, like it is when it works fine. If the AC wonât work properly, one of the first things you should check is your air filter. alot of times it it is an older ac unit. The air condenser unit is the box-shaped air conditioner unit outside your home. Sometimes it comes on just fine...other times nothing happens when I turn it on. Dirty Condenser. I am having a similar problem where the fan doesn't come on sometimes during cool cycle in Auto mode. The outside unit's fan does run. I am enrolled in a program that shuts off air conditioning for fifteen minutes at a time on the hottest days of the summer, but the AC has been off for hours recently. This happens only sometimes and mostly it works fine. If there is a large refrigerant leak, you will ⦠Clogs reduce effectiveness and may eventually cause an airflow problem. Whats interesting is --when this happens, if I change the fan position from Auto to ON, the fan still doesn't ⦠The AC unit does not cool rooms evenly: Inspect your unitâs distribution channels. So under normal operation _ once in couple of days the fan doesn't come on... causing the temp to shoot higher. The other two lights may be on the same circuit, but I'm not sure because they are controlled by separate wall switches. Why does my air conditioner only work sometimes (intermittently) in my 2000 Toyota Tacoma PreRunner? Make sure that the fan on your unit is kicking air into rooms or into your duct system. when it isn't working go outside and look to see if ice is built up on it also check to see if it is draining alot of water. I have multiple lights that sometimes work, sometimes don't, as well as my heating unit. I have a programmable thermostat, but the problem occurs infrequently and without warning (sometimes in the afternoon, sometimes in ⦠However after I turn the AC off for a while, one to two hours, the blower can com back working for several hours, then it stops again with hums. Another possibility is a damaged compressor, which prevents the unit from releasing heat outside. This unit contains the air compressor, cooling fins, air ⦠It seems to work when it wants to but it does seem to stop cooling if I've been out driving a couple hours. However, having the fan running but the compressor not working is nothing too dire, so donât panic. over the winter the freon leaks out and the unit will not work ⦠... My air conditioner sometimes works but after 20 mim itstops working sometimes it works real cold sometimes dont work at all ... GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer ⦠Check the line set (copper tube going from indoor to outdoor unit) and look for any areas that are damaged. My house outside AC works fine, but the blower inside sometimes stops working with huge hums. The technician has replaced the capacitor, but the problem stays the ⦠say 5 yrs or more it can have a slow freon leak. The AC unit turns on but doesnât cool: If your unit turns on but doesnât cool, check your thermostat to be sure that it is set at the correct ⦠Split-system central air conditioners, used with forced air furnaces, take hot air from the house and blow it through an evaporator coil located in the top of the furnace to cool the air. Just because your AC is on doesnât mean every component in it works as it should. Also visually inspect the connections at the inside and outside. A working AC will provide you with nice and cold air as opposed to bearing the brunt of warm, dry air. 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