Furrion E4 fault code — Water heater
Applies to: F2GWH, Lippert PN 2022107551
What E4 means
The Furrion F2GWH manual lists E4 as water inlet temperature probe failure.
Owner-safe checks
- Turn hot-water demand off and power-cycle once only from the normal controls.
- Record the code, displayed temperature, and whether water was flowing.
- Contact Furrion or a qualified technician if E4 returns.
Service-only work
- Internal sensor, ignition, flame-sense, ECO, blower, pressure-switch, linear-valve, wiring, and controller diagnosis is qualified service work.
Safety boundary
Do not keep operating a tankless gas water heater with repeated display faults, abnormal heat, blocked exhaust, gas odor, or unstable hot-water temperature.
Official sources
Related symptom guides
- Furrion tankless water heater low flow or low temperature
- Pre-service checklist for RV appliance calls