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Cant clear E5 code on dometic RV thermostat!

I have a dometic 3 touch button that will not allow my RV AC unit run in auto mode high and low work as well as furnace but auto mode will not it has an E5 error code that I cant seem to clear and ive tried just about everything in the book

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Hi @alberteins97458

What is the model number of the thermostat?

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