Similar error on Acson air-conditioned last year. Orange blinking light came on occasionally then one day it stopped working. I assumed its the thermostat so bought one online to have it replace but to no avail. Ended up the issue is due to circuit board. Since it's 6-7 years old, decided to replace entire system.

This post has been edited by Xccess: Jun 30 2024, 10:56 PM