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FAQ Answer


Error Code E3:


Outdoor Sensor:  (Heat Pump Only) this code means that the PC board is not receiving a signal from the copper sensing bulb mounted to the copper tubing near the condenser coil.

Diagnosis:  visually inspect and/or use an ohmmeter to check the following:

  • Sensor has come unplugged from the PC board.  OR.
  • Sensor has failed and must be replaced.  OR.
  • Sensor wire has shorted or opened necessitating the repair of the wire, since this wire runs through one or more walls, the likelihood of the wire being cut is probable.

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