“E1” code appears on hot water heater panel

[Spaggs]

We get this “E1” code that appears on our hot water heater readout. The AS is a 2022 28’ FC, so we’ve been blessed with the new and improved tankless water heater.
Any thoughts what this might be the result of?
How to fix the problem, etc?
Thanks.

[JetstreamAS]

Yep, likely the low temps overnight. See page 5-18, easy fix.

https://www.airstream.com/wp-content...al-Rev03-1.pdf

[DCOWHO]

Originally Posted by Spaggs

We get this “E1” code that appears on our hot water heater readout. The AS is a 2022 28’ FC, so we’ve been blessed with the new and improved tankless water heater.
Any thoughts what this might be the result of?
How to fix the problem, etc?
Thanks.

In my case it was because I had forgotten to turn the propane on.