Xantrex Inverter / Charger: “E04”
warning RV inverter fault codes
What it means
Over-temperature shutdown. The inverter's internal temperature reached its protective limit and the unit shut down to prevent damage. The status LED turns solid red. (Code E07 is the earlier over-temperature warning before full shutdown.)
Most likely causes
- Blocked or obstructed ventilation grille most likely
- High ambient temperature around the unit common
- Sustained heavy load near the rated output common
- Cooling fan obstruction or failure less common
Safe checks you can do yourself
- Make sure the ventilation grille and air vents are not blocked
- Move the unit to or improve airflow in a cooler location
- Reduce the AC load if running continuously
- Allow the unit to cool down before restarting
How to reset / clear E04
- Let the inverter cool
- Clear the cause (improve ventilation, reduce load)
- Use the front-panel power button to clear the alarm once cooled
When to call a technician
If E04 recurs with good ventilation and a modest load, the cooling fan may have failed; contact a qualified technician.
Applies to
Freedom XC PRO 2000 · Freedom XC PRO 3000
FAQ
What does Xantrex Inverter / Charger code "E04" mean?
Over-temperature shutdown. The inverter's internal temperature reached its protective limit and the unit shut down to prevent damage. The status LED turns solid red. (Code E07 is the earlier over-temperature warning before full shutdown.)
How do I reset Xantrex Inverter / Charger E04?
Let the inverter cool Clear the cause (improve ventilation, reduce load) Use the front-panel power button to clear the alarm once cooled
What is the most common cause of E04 on a Xantrex Inverter / Charger?
The most likely cause is blocked or obstructed ventilation grille.
Related · Xantrex inverter / charger
The battery voltage has fallen low enough that the inverter … E02
High battery voltage shutdown. The DC input voltage has rise… E03
AC output overload shutdown. The connected AC load exceeded … E10–E19
Internal hardware error. The inverter/charger detected an in…
Sources
- Freedom XC PRO Inverter/Charger Owner's Guide — Table 13 Error codes; Over-temperature shutdown (E04) and over-temperature/fan alarm (E07), PN 975-0799-01-01 Rev D (Xantrex)
Note: E07 precedes E04 as a warning; E08 is a fan-lock error in grid (bypass) mode per the same table.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.