E2 error and unit runs fan but no cooling control, temperature reading is inaccurate

Safety first: Unplug the Pro Breeze unit before removing any covers. Sharp metal edges around the coil can cause cuts—wear gloves.

• Step 1 – Access evaporator coil:
  • Remove the front cover and air filter.
  • On portable units, remove the upper housing screws to expose the evaporator (cold) coil.
• Step 2 – Locate coil sensor:
  • Find a small probe or clip-on sensor attached to the evaporator fins or tubing, usually with two wires leading to the PCB.
  • Ensure it is firmly clipped to the coil and not hanging loose.
• Step 3 – Inspect and reseat:
  • Trace the sensor wires back to the main PCB and confirm the connector is fully seated.
  • Look for insulation damage or corrosion at the connector.
• Step 4 – Replace sensor if faulty:
  • If the sensor is physically damaged or tests open/short with a multimeter, replace it with a Pro Breeze Evaporator Temperature Sensor / NTC Thermistor specified for your model.
  • Clip the new sensor securely to the coil in the same location to ensure proper defrost and freeze protection.

If E2 persists after sensor replacement, the main control PCB may not be reading the sensor correctly and should be evaluated by a technician.