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
kellertx5er wrote:
Isn't a properly functioning expansion valve supposed to prevent freezing, regardless of fan speed?
NO, is the simple answer. Expansion valves are what help produce the cold, NOT regulate it. There is no "expansion" Valve on a RV roof top AC unit. The use a Capillary tube system. Even on RV Dash AC systems with a Expansion valve, there is a mechanical cold tstat that shuts the compressor off if the evaporator starts to freeze up. Doug
