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Hissing from vents and slow loss of refrigerant

Q: How to fix Hissing from vents and slow loss of refrigerant in Renault ESPACE V (JR_)?

Replace the damaged, rigid aluminum underbody lines with flexible high-pressure rubber barrier hoses along the entire underbody length. This definitive workshop fix completely eliminates galvanic corrosion and prevents future line cracking. Alternative repairs include cutting out the corroded section and installing repair connectors (e.g., Lokring) or replacing with new OEM lines while electrically isolating them from the steel brackets.

in Renault ESPACE V (JR_) (2015-2023)

Symptoms

Slow loss of refrigerant

DTC error codes

DF090

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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

V (JR_)

Refrigerant: R1234yf Amount (g): 480 (+/- 35)g Oil: PAG YF ISO 46 (SP-A2) Oil (ml): 110ml

V (JR_) z tylnym parownikiem

Refrigerant: R1234yf Amount (g): 700 (+/- 35)g Oil: PAG YF ISO 46 (SP-A2) Oil (ml): 180ml

IV (JKO) 1,9 D dCi/2,0 i/2,0 i Turbo

Refrigerant: R134a Amount (g): 965 –1035g Oil: SP 10 PAO 68 lub PAG ISO 46 Oil (ml): 190 – 210ml

See full specification

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