Furrion lo fault code — Thermostat
Applies to: FACW13VSDSA-BL, FACC13VSD
What lo means
The Furrion Chill Cube thermostat manual lists lo as insufficient low level of +12 V power supply; system will shut down.
Owner-safe checks
- Check RV 12 V power state from installed monitors.
- Record whether other 12 V devices are also weak.
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.
Official sources
Related symptom guides
- RV appliance low-voltage warning
- RV thermostat communication error
- Pre-service checklist for RV appliance calls