E1 means the indoor temperature sensor is reporting a fault. That sensor is what the unit uses to read the room, so a fault here is not something to fix by changing the setpoint. The published step is the same safe reset used for sensor codes: write down E1, switch the unit off at the breaker for a few minutes, then restore power. If the code comes back, call support and have the model number ready. Sensor replacement is marked pro-only. Do not open the indoor unit or probe the sensor leads yourself. A licensed HVAC technician is the person who tests and replaces that part.
What to do
- 1Note the code, switch the unit off at the breaker for a few minutes, then switch it back on. If the code returns, call support with the code and your model number.
Sensor, board, fan motor and refrigerant repairs need a licensed HVAC technician. Have your model number and purchase date ready when you call.
Call support: 1-800-349-4360 Ext. 204