Error Code AMBIENT_SENSOR

Ambient air temperature sensor reading is out of normal range

Minor

Usually easy to fix - may resolve on its own

Also displayed as: F and R blink

What This Means

Connector CN60 pins 3/5 loose or damaged; Ambient sensor open or shorted; HUM-TEMP sensor assembly failure

What actually causes this:

The sensor measuring room temperature (used for efficiency adjustments) has failed or lost its connection.

First Thing to Check

Remove the top table cover and check that the sensor connector is firmly clipped in.

Parts Involved

Ambient sensor (Assy Top Table)MAIN PCB CN60

How to Fix

  1. 1

    Verify voltage at MAIN PCB CN60 pins 3 and 5 is between 1.0V and 4.5V

  2. 2

    Measure resistance at Ambient: CN60 '5' ↔ '3'

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