What To Do When Your Atwood RV Air Conditioner System Has An E4 Error Code

Updated 03/02/2023 | Published 03/01/2023

Question:

I have been told that I will have to replace my air conditioner on my 5th wheel camper it is a atwood air command 15k btu ducted. the thermostat is reading an E4 code. when I first turn it on it will work a few minuted then it will show the E4 code then back to the temp setting a few seconds later it shows the code again and no longer cools. will I need to replace the air conditioner

asked by: Nola S

Expert Reply:

An E4 error code indicates either a lack of refrigerant, a bad compressor, or an uncalibrated thermistor. The compressor isn't a replaceable part but you could see if the thermistor needs to be recalibrated by completing the steps listed in the attached picture.

Since RV air conditioner condenser units have a closed refrigerant system you wouldn't be able to add in more like you would with your residential condenser unit and ultimately would need to replace the unit if it is in fact low. Atwood units are being phased out by Dometic so I recommend getting away from the brand completely and going with the Furrion Chill HE RV Air Conditioner System # FR55PV.

This system will completely replace your Atwood and give your a sleeker design and more efficient cooling. It designed to work with both ducted and ductless trailers so you'll want to follow the ducted instructions in the manual when installing the air distribution box. This unit comes with a start capacitor as well, which will store energy to help start the unit so there isn't a big power surge every time it kicks on.

I know it's a big expense replacing your AC system so if you have any other questions please feel free to shoot them my way.

expert reply by: Kevin C