Furrion Furnace E4 Error: What to Record Before Calling Service

Use the Furrion Furnace E4 support video page as a source-only owner-safe prep guide; this page does not add a fault-code table entry.

Owner-safe checklist

Record the Furrion furnace model, E4 error code, thermostat state, blower behavior, vent condition from outside, and when the error appears.
Save photos of the display, thermostat, model label, exterior vent condition, and any service paperwork from normal owner access.
Shut the furnace down and turn LP off for LP odor, soot, yellow flame, blocked vent concern, overheating, or repeated E4 symptoms.
Use Furrion/Lippert support or qualified RV furnace service for internal furnace parts, LP system, airflow safety, installed power, or repair decisions.