Indoor unit stops cooling, indoor fan may run but compressor stops; display shows E2.

Safety first: Turn off power at the breaker and wait a few minutes before opening the indoor unit.

Steps:

• Access sensor: Remove the front panel and filters. Carefully remove the plastic cover over the electronic compartment to expose the indoor PCB and sensor connectors.
• Locate T1 sensor: The evaporator sensor is usually a small NTC probe clipped to the evaporator coil fins near the center or inlet side, with two thin wires leading to the PCB.
• Check connection: Ensure the sensor plug is firmly seated on the PCB and that the wires are not cut or pinched.
• Test sensor: Disconnect the sensor and measure resistance with a multimeter. At room temperature (~25°C), most Blaupunkt NTC sensors read around 5–15 kΩ (check service manual for exact spec). Infinite or near-zero resistance indicates a bad sensor.
• Replace sensor: If faulty, replace with a Blaupunkt-compatible evaporator NTC sensor for your model. Clip it securely back onto the coil in the original position and route wires away from the fan.
• Reset power: Restore power and test operation. The E2 code should clear automatically if the fault is resolved.