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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 Suzuki AZ-Wagon?

Replacing the evaporator with a new, modified, corrosion-resistant evaporator and replacing a blocked compressor, along with flushing the system with solvent. Covered by official Suzuki recall no. 3162. Before installing the new compressor, pour the appropriate amount of fresh PAG oil into it, having previously poured out the transport oil.

in Suzuki AZ-Wagon (2008-2015)

Symptoms

Slow loss of refrigerant

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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

R (MM) 1,3 i

Refrigerant: R134a Amount (g): 450 – 500g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 135ml

R (EM)

Refrigerant: R134a Amount (g): 500 – 600g Oil: PAG PAO 68 b.d. Wagon Oil (ml): b.d.ml

See full specification

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