Medium priority 89% confidence

No airflow from specific vents or clicking noise behind dashboard

Q: What are the symptoms of No airflow from specific vents or clicking noise behind dashboard in Cadillac DeVille?

Different temperature on both sides of the cabin. Clicking or rattling behind dashboard. A/C does not react to control panel settings

Q: How to fix No airflow from specific vents or clicking noise behind dashboard in Cadillac DeVille?

Replace the failed blend door actuator assembly (ACDelco / GM OEM 604-106 or equivalent) on the affected driver or passenger side. Access requires removing the lower trim panels in the footwell area.

in Cadillac DeVille (2000-2011)

Symptoms

Different temperature on both sides of the cabin
Clicking or rattling behind dashboard
A/C does not react to control panel settings

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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

Refrigerant specifications for this model are available in the catalog.

Open refrigerant database

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