Why does ice form on my exchange line on my central AC when I run it on full auto?
Wednesday, February 4th, 2009
iceman2 asked:
When I set the t-stat to full auto,(in other words, fan turns on only when when the compressor starts) ice forms on the insulated exchange line between the compressor and the coil, and the compressor will not shut off - I have to kill the power from the circuit breaker box; when I leave the fan on continuously, no ice forms and the unit cools properly, however if I don’t leave the fan on, ice forms on the line and the unit can’t cool. The constant noise from the fan can be a little annoying.
When I set the t-stat to full auto,(in other words, fan turns on only when when the compressor starts) ice forms on the insulated exchange line between the compressor and the coil, and the compressor will not shut off - I have to kill the power from the circuit breaker box; when I leave the fan on continuously, no ice forms and the unit cools properly, however if I don’t leave the fan on, ice forms on the line and the unit can’t cool. The constant noise from the fan can be a little annoying.
