How to fix No cooling (total) in Lincoln Aviator?

Proper seating of the pin in the BCMC plug and securing the harness. Before purchasing a new BCM, physically check the plug for any pushed out pins. This is an assembly defect described in SSM 51380.

High Priority 98% confidence

No cooling (total)

in Lincoln Aviator (2020-2023)

Symptoms

No cold air from vents

DTC error codes

P0645

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Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

od 2020 (nowsze generacje)

Refrigerant: R1234yf Amount (g): 850 - 1100g Oil: PAG ISO 46 YF Oil (ml): 150ml

2003–2005 (1 parownik)

Refrigerant: R134a Amount (g): 1306g Oil: PAG ISO 46 Oil (ml): 120ml

2003–2005 (2 parowniki)

Refrigerant: R134a Amount (g): 1588g Oil: PAG ISO 46 Oil (ml): 220ml

See full specification

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