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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 Saab 9-5 (I)?

EVAPORATOR: Removing the board, replacing the OEM or Delphi evaporator. COIL: Remove the clutch disc, replace the coil (PLN 85-150) without unsealing the system. COMPRESSOR: Sanden or Denso replacement for GM platforms. Saab no longer has an authorized dealership - look for parts at: autodoc.pl (Delphi replacements), e-bay (UK demolition warehouses). The Saab clutch coil fits many Delphi compressors from GM platforms.

in Saab 9-5 (I) (1997-2011)

Symptoms

Slow loss of refrigerant

DTC error codes

Low pressure / Clutch open circuit

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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

1,9 D TiD

Refrigerant: R134a Amount (g): 825g Oil: 16 4759 106 PAO 68 lub PAG ISO 46 Oil (ml): 120ml

2,0 i/2,3 i BioPower/2,0 i + 2,3 i Turbo/2,3 Aero

Refrigerant: R134a Amount (g): 825g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 145ml

Standard

Refrigerant: R134a Amount (g): 875g Oil: ND8 PAO 68 lub PAG ISO 46 Oil (ml): 145ml

See full specification

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