A lot of times this can be from a dirty filter or air louvers being blocked on your # ACDOM150. Remove power, let the coils thaw, check the filter, and make sure the louvers are properly positioned so cold air isn't recirculated into the unit. You also want to make sure the ports on the front of the unit that allow condensation to drain aren't blocked. If this doesn't solve your problem I would try calling ASA Electronics so they can help you troubleshoot while you're at the unit. view full answer...
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