Furrion E3 fault code — Thermostat
Applies to: FACW13VSDSA-BL, FACC13VSD
What E3 means
The Furrion Chill Cube thermostat manual lists E3 as loss of communication between the thermostat and air conditioner; thermostat remains operable for gas furnace heating function.
Owner-safe checks
- Turn air-conditioning mode off if the unit is not responding.
- Record whether gas furnace heat remains available.
- Check only normal RV power controls before calling service.
Service-only work
- 120 VAC supply, loose wiring, air-conditioner communication, sensor, thermostat, control-box, and HVAC electrical diagnostics should be performed by qualified service personnel.
Safety boundary
Disconnect power before HVAC service. Do not open rooftop, line-voltage, or control-box electrical compartments unless qualified.