Indoor unit shows E2 and stops cooling or heating; unit may run briefly then shut down.

Safety: Turn off power at the breaker before opening the indoor unit.

• Step 1 – Access the sensor: Remove the front cover and air filters of the Senville indoor unit. Carefully remove the plastic shroud to expose the evaporator coil.
• Step 2 – Locate T1 sensor: The evaporator sensor is a small probe clipped to the evaporator coil tubing, usually near the center. Follow its wires back to the indoor PCB.
• Step 3 – Check connection: Ensure the sensor plug is firmly seated on the PCB and that there are no broken or pinched wires.
• Step 4 – Inspect sensor placement: Make sure the sensor is tightly clipped to the coil and not hanging loose. A loose sensor can misread temperature and trigger E2.
• Step 5 – Replace sensor if needed: If the sensor is physically damaged or E2 persists, replace the evaporator temperature sensor with a compatible Senville sensor. Route the new sensor wiring along the original path and secure it away from the fan.
• Step 6 – Board check: If a new sensor does not clear E2, the indoor PCB may be defective and should be tested/replaced by a technician.