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.
Accuracy notes
E07 precedes E04 as a warning; E08 is a fan-lock error in grid (bypass) mode per the same table.
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 is about to… E02
High battery voltage shutdown. The DC input voltage has risen above… E03
AC output overload shutdown. The connected AC load exceeded the… E10–E19
Internal hardware error. The inverter/charger detected an internal fault…
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)
● Checked against 1 manufacturer document · Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual. How we verify