ac froze up when fan on low speed.
Exactly twice my a/c has frozen up.Once last year and just this weekend. Both times it was very hot and humid and the unit ran all day trying to keep up and at some point the fan speed was set to low...
Forum Discussion
Very common problem. Allow me to provide an example of how I used to remove excessive amounts of humidity. This is not practical in everyday use but it does provide a clue as to what happens.
I mounted a 5,000 BTU air unit directly in the path of a 16,000 BTU evaporator/fan outflow. The 5,000 was ingesting the chilled air of the 16,000 BTU unit.
Starting off the humidity was in excess of 70%. Seventy-five or six if I remember correctly. Temperature was in the low mid nineties. Sticky sweaty hot.
Enabled only the larger unit. Watched hygrometer, and thermometer. For the first 15 minutes the hygrometer which was out of the reach of outflow dropped humidity but the temperature dropped perhaps 2 to 3 degrees. Humidity fell to the sixty percent mark, then the temperature started to drop.
After about an hour the humidity stabilized around 58% the temperature continued to go down. When it reached 75 the humidity was still 58%. The big unit could not extract additional moisture from the air.
I started the LG 5,000. Set it to 1st fan speed. It took about 20 minutes or so but the hygometer confirmed that the humidity was being lowered by the 2nd unit without the temperature falling more than one or two degrees more.
I checked outside. The stream of water from the big unit had lessened but now the condensation at the little AC was a steady drip drip drip.
I got the R/H down to around 47 then ceased and desisted.
Time to start sealing up electronic components in food saver bags! Double bagged.
Awoke the next morning, temperature same humidity had climbed back into the mid sixties.
Single stage cooling not so hot for removing humidity. Unless the unit is huge huge and has a recirculator.
I mounted a 5,000 BTU air unit directly in the path of a 16,000 BTU evaporator/fan outflow. The 5,000 was ingesting the chilled air of the 16,000 BTU unit.
Starting off the humidity was in excess of 70%. Seventy-five or six if I remember correctly. Temperature was in the low mid nineties. Sticky sweaty hot.
Enabled only the larger unit. Watched hygrometer, and thermometer. For the first 15 minutes the hygrometer which was out of the reach of outflow dropped humidity but the temperature dropped perhaps 2 to 3 degrees. Humidity fell to the sixty percent mark, then the temperature started to drop.
After about an hour the humidity stabilized around 58% the temperature continued to go down. When it reached 75 the humidity was still 58%. The big unit could not extract additional moisture from the air.
I started the LG 5,000. Set it to 1st fan speed. It took about 20 minutes or so but the hygometer confirmed that the humidity was being lowered by the 2nd unit without the temperature falling more than one or two degrees more.
I checked outside. The stream of water from the big unit had lessened but now the condensation at the little AC was a steady drip drip drip.
I got the R/H down to around 47 then ceased and desisted.
Time to start sealing up electronic components in food saver bags! Double bagged.
Awoke the next morning, temperature same humidity had climbed back into the mid sixties.
Single stage cooling not so hot for removing humidity. Unless the unit is huge huge and has a recirculator.
