What does the error code E2 mean?
Open circuit or out of range indoor temperture sensor. locks out cool and heat.
SOURCE: The thermostat is flashing and E2 error
It means the trailer is too warm for the thermostat to work - above 90 degrees inside. Take some ice and put in ziplock bag - place over thermostat and cool it down. Unit will start working when thermostat senses it is BELOW 90 degrees. FAULTY DESIGN.
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