What are the symptoms of Blower vents emit warm air when A/C is turned on in Renault Trafic 3?

No cold air from vents. A/C does not react to control panel settings

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Blower vents emit warm air when A/C is turned on

Q: How to fix Blower vents emit warm air when A/C is turned on in Renault Trafic 3?

Replacing the pressure switch (OEM 214680361R) and clearing the errors with a computer.

in Renault Trafic 3 (2014-2023)

Symptoms

No cold air from vents
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

2,0 D dCi

Refrigerant: R134a Amount (g): 650g Oil: PAG PAO 68 Oil (ml): 230ml

1,9 D dCi (F9Q762)/2,0 i/2,5 D dCi

Refrigerant: R134a Amount (g): 720 –780g Oil: Planetelf PAG 488 PAO 68 lub PAG ISO 150 Oil (ml): 220 – 235ml

2,0 i/2,5 D dCi

Refrigerant: R134a Amount (g): 730g Oil: PAG PAO 68 Oil (ml): 230ml

See full specification

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