Display shows E2 and compressor will not start

Safety: Disconnect power before opening the cabinet. Edges around the coil and chassis can be sharp; wear cut-resistant gloves.

Diagnostic and fix steps:

• 1. Access the evaporator: Remove the front or side panels to expose the evaporator coil (cold coil). The evaporator sensor is usually clipped or strapped to the coil tubing.
• 2. Check sensor placement: Ensure the sensor bulb or probe is firmly attached to the coil surface. If it has fallen off, re-clip or re-tape it using aluminum tape or the original clip.
• 3. Inspect wiring: Follow the two-conductor cable from the sensor back to the main PCB. Look for chafing where it passes through metal, and ensure the connector is fully seated on the board.
• 4. Measure resistance: With the unit unplugged, disconnect the sensor and measure its resistance at room temperature. Compare to Ebac service data for your model; if it reads open or shorted, replace the sensor.
• 5. Replace sensor: Install the correct Ebac evaporator NTC sensor, secure it tightly to the coil, and route the cable along the original path, using cable ties to keep it away from the fan.
• 6. Evaluate the PCB: If a new sensor does not clear E2, the control board's sensor circuit may be defective. Visual signs include burnt spots or corrosion; replacement of the main PCB is typically required.

Note: Do not bend or puncture refrigerant tubing while working around the evaporator.