Furrion Chill rooftop AC fault codes
Lippert's rooftop unit, run by a wall thermostat over a two-wire data link (A and B) to a control box in the ceiling assembly. Few codes; most calls are sensor placement, communication wiring or low 12V.
Furrion Chill code E1
Indoor temperature sensor failed. If the sensor is in the return air, the control box is replaced. If it is in the thermostat, replace the thermostat.
Furrion Chill code E3
Lost communication between the thermostat and the control box. Check the A and B wires for damage, swapped A/B, or a loose plug at either end. A pinched wire behind the thermostat plate is common.
Furrion Chill: Shuts down, no code
12V below 10V at the control box. Check the coach battery and the 12V feed to the ceiling assembly under load.
Furrion Chill: Freeze sensor fault
Evaporator sensor circuit open. Reseat the plug first; replace the sensor if the connection is good.
Furrion Chill: Condenser sensor fault
Sensor the unit does not have. The heat pump DIP switch got turned on. Turn it off.
Furrion Chill: Outdoor sensor fault
Outdoor sensor failed, whole system down. Replace the sensor.
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Guided diagnosis
Full field guide: Furrion Chill rooftop AC
Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.