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Home >> Infiniti >> 2021 >> QX50 Essential, 4WD >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater & Air Conditioning Control System (Diagnostics, Service Information) >> System Description >> System >> Automatic Air Conditioning System >> Fail-safe >> Fail-Safe Function
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Fail-Safe Function

If a communication error exists between the A/C auto amp. and AV control unit for 30 seconds or longer, air conditioning is controlled under the following conditions:

When ambient temperature is less than 3 deg. C (37 deg. F) and engine coolant temperature is less than 56 deg. C (133 deg. F)

Compressor

: ON

Air outlet

: DEF

Air inlet

: FRE (Fresh air intake)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

When ambient temperature is 3 deg. C (37 deg. F) or more, or engine coolant temperature is 56 deg. C (133 deg. F) or more

Compressor

: ON

Air outlet

: AUTO

Air inlet

: FRE (Fresh air intake)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

NOTE: When ambient temperature is less than 3 deg. C (37 deg. F) and engine coolant temperature is less than 56 deg. C (133 deg. F), low coolant temperature starting control do not operated.