Dometic and Furrion RV AC Error Codes Explained (E1 to E9)
Posted by RV AC Guys on 22nd Oct 2026
What your RV AC thermostat is trying to tell you
When an RV air conditioner stops working, the wall thermostat often shows a short code instead of the temperature. Those codes point to the problem, but the manuals that explain them are hard to find. Here's what the common Dometic and Furrion codes mean, taken from the manufacturers' thermostat manuals, plus what to check first.
Two rules apply to
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