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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 Maserati LEVANTE?

Replace the internal evaporator core with an upgraded, corrosion-resistant unit. This intensive repair requires complete removal of the center console, dashboard structure, and HVAC casing. It is highly recommended to replace the thermal expansion valve (TXV), all O-rings, and thoroughly clean the HVAC box of oil residue during this process.

in Maserati LEVANTE (2016-2026)

Symptoms

Slow loss of refrigerant

DTC error codes

B10A9

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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

M161 - Układ standardowy dla nadwozia typu SUV

Refrigerant: R134a / R1234yf Amount (g): 750g Oil: PAG ISO 46 YF Oil (ml): 130ml

See full specification

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